David Abram Ecology of Magic

Humans are born from and return to earth at death; human beings and nature are bound up each other. Yet, the technological modern world has shaped humans to be oblivious of nature and the ethnocentrism has positioned human beings above all other things. Nature has become resources for people and nothing more than that. David Abram, the author of the Ecology of magic, travels into the wild, traditional land in search of the relation between magic and nature; the meaning nature holds in the traditional cultures. Abram intends to communicate his realization of the magical awareness of the countless nonhuman entities and the necessity of the balance between the human communities and the nature to the readers, hoping the Western technologized people to regard nature with respect and wonder. The perceptional differences Westerners and the traditional people hold in regard of nature should be transcended to achieve equilibrium and consequently bring about a healthier society. What is it that Abram experiences in the traditional land of Indonesia? Abram is also one of the Westerners who lived all his life in the modern technological world; he once was a person who did not know the true value of nature. However, in the traditional, oral land, the author succeeds in overcoming the perceptional differences and realizes the importance nature holds in his life. During the travel, Abram purposefully encounters and befriends the traditional magicians or sorcerers with his sleight of hand magic that buys interest from them. As the author states, â€Å"For magicians – whether modern entertainers or indigenous tribal sorcerers – have in common the fact that they work with the malleable texture of perception† (Abram, 3), the common ground of ‘working with the malleable texture of perception’ has let Abram to look more closely into the activities the magicians perform in the traditional oral land. As Abram works his hands to trick the audience, thereby working with the perceptions of the audiences, the magicians engage in shedding the accepted perceptual logic to enter into relation with other entities. The primary objective of the magicians, at first, seems to be healers as they participate in treating the sicknesses; however, Abram learns that the magicians hold a more important role in the human communities. They act as the intermediaries between the human world and the nature. The diseases that circulate the village originate from the imbalance between the nature and the human world and the magicians work with the primary cause of the sicknesses. The basic concept of treating the illnesses differs from the Western doctors who perform surgeries as the magicians, living at the periphery of the human communities, sought to communicate with the nature, consequently striving to achieve equilibrium. The prayers, praises and the propitiations given to the nature in return for the nourishment and sustenance it provides to human communities do not seem forthright at first, even to Abram; the magician’s primary role only seems as formal traditions that hold no meaning for the villagers who only yearn for visual and direct treatment of the diseases. Yet, as Abram suggests, â€Å"†¦and it was only gradually that I became aware of this more subtle dimension of the native magician’s craft† (8), while living in the remote traditional land and experiencing the diverse, rather different performances, the author was able to notice and learn seeing and hearing things in different manners. ‘To see and hear in a manner I never had before’ (15) was not something that Abram learnt with his head, but rather a feeling obtained with his skin. By shifting out human’s awareness to other various nonhuman beings and thinking in the perspective of those intelligences’ (7), Abram was able to hold respect and awe for nature and realize the importance of the balance. Just by staring into the spiders, the birds, the river and the wind, Abram was able to communicate with these nonhuman entities and see the importance these beings hold in human beings’ daily lives. The basis of the perceptional difference lies in the mere difference in how the traditional and the Westerners regard the relation between magic and nature. In the Western world, magic is defined as the ability to alter one’s consciousness at will. The magicians perform hand tricks to startle the senses and free the audience from the outdated and restricted thoughts by inspiring awe and surprises within the individuals. This is the common image that we bring up when thinking of the word magic and magician. Westerners find no relation between magic and nature as the two are thought as two distinct concepts. However, people of the oral, traditional land conjure up different idea in regard of magic and nature. The two are correlated concepts as magic can be defined as â€Å"humans experience their own consciousness as simply one form of awareness among many others† (7). Magic is shifting out one’s consciousness to put it in others shoes. The others indicate the many beings regarded to have intelligence, the components of nature. By thinking in the perspective of other nonhuman entities, as Abram succeeded in doing in the traditional land, the magicians communicate with the nature. As the author mentions, â€Å"Countless anthropologists have managed to overlook the ecological dimension of the shaman’s craft, while writing at great length of the shaman’s rapport with supernatural entities† (6), the Western people simply fail to recognize the relationship between nature and magic because they have been raised to think of what is beyond human’s will as the â€Å"supernatural† rather than in the dimensions of nature. Human beings, in the technological, modern world, stands above all other things as the ethnocentrism has shaped people to think in human-based terms; the surrounding environment, including the rocks, mountains, and the animals, have been placed there for human use and nothing more than that. They are entities with no senses, no thoughts, and no feelings. Humans are the only beings with intelligence. The busy daily lives formed due to the advanced technology have shaped people to simply deny the existence of other entities and perceive things other than humans as non-meaningful. Abram, too, adjusts to the modern world and returns to his original life as a Westerner who fails to regard nature with respect when he goes back to his homeland from Indonesia. Despite all the feelings and knowledge gained in the traditional land, because of the technology and the ethnocentrism Abram fails to continue his communication with the nature. Yet, the importance of respect for nature and the balance between nature and human beings should be comprehended by the modern society people. As the author has witnessed, â€Å"The sad results of our interactions with the rest of nature were being reported in every newspaper – from the depletion of topsoil due to industrial farming techniques to the fouling of groundwater by industrial wastes†¦Ã¢â‚¬  (20), the damages spurred on the nature due to human’s endless desires result in dire situations of extinction of animals and the rapid destruction of the tropical forests. The broken equilibrium causes diseases to circulate the society. Constant advancements in technology do not work out to correct the damages done to human beings and the nature. What should be taken for human use should be compensated for to the nature; balance is the most fundamental way to end the vicious cycle that constantly damages both human beings and the nature. Modern people should not disregard the relation between magic and nature. Understanding the importance nature holds for human beings would arouse the magical forces of the equilibrium.

Computer negative or positive effect

Using computers everyday can have more ,negative than positive effect on young children. Nowadays computer play a crucial role for young generation. Mostly children dependent on computers for multifarious purposes. But some people believe that it cause obstacle between their healthy life and in acquiring practical knowledge. Lets delve deeper into the topic to seek more clarification. Firstly and most commonly,the advanced technology make the people more lethargic. The children spend their leisure time in playing games on computer which cause paucity of interaction with their friends.Because team work is must to interact with the world. While sitting in front of the monitor screen their eye sight effects badly. ln addition, numerous children suffered from back pain and obesity problem that occurs due to the lack of physical exercise. This problems have create critical health hazards. Furthermore, The use of computers make the life more fast and easy. Students enhance their knowledge and learn the use of technology. Due to the modern era it is must for the children to keep them-self update. today their is a world of cut throat competition .The computer beneficial to improve the general knowledge and IQ evel. lt makes the children more occupied in work and its better to stay away from bad habits. In nutshell, It would safe to say the advantages of the computer over weigh the disadvantages. To conclude, computer meant to make live comfortable and easy but people handle that in complex and abusive manner. lts not possible to keep away the children from computers. The children should allow them to use it in the supervision of parents only. 2. Topic: â€Å"Using a computer everyday can have more negative than positive effects on children.Do you agree ? Explain your opinion with relevant examples . ln today's technologically developed world, the computer is no longer a luxury-{don't use hyphens in a formal essay, use a comma here} but a staple of everyday life. In pe rsonal, professional and academic spheres reliance on the computer is inevitable. Although,{no comma} some would say that use of a computer at an early age has detrimental effects, I content that its benefits outweigh its risk[s {good intro}The current education system places a great amount of mental pressure on students. this is your topic sentence and should give your first reason for your argument} Including omputer and internet with the studies may make the curriculum more interactive and interesting. {try to put this reason first and then explain it} Learning vast syllabus{you don't learn the syllabus really} and diverse topics in different areas can often force a student to opt for rote learning without putting stress on their brain, {this is unclear, do you mean â€Å"to avoid putting stress †¦ â€Å"? } such [a] method further lead[s ] to strait-Jacket [a] child's cognitive skills.In contrast, use of computers and internet for exploring such topics will help them in a chieving an in-depth knowledge nd understanding trom their roots{tnis sounds like you are talking about the children's roots}. It can further stemmed{what can be stemmed? } to make them a good abstract thinker. It is also worthy to galvanize{â€Å"galvanize† sounds odd here} the use of computer during children's leisure time. {once again, try to start with your reason}There are a galore [of] {â€Å"galore† might be a little too informal for this type of essay} strateg[y-]related computer games available in the market.Playing such skill games is a good way of increasing one's concentration level, boosting self-confidence and improving the[one's] thinking capability. In today's Job market, every single openings comes up with a requirement of mandatory computer knowledge with hands-on [training], on the rudiments of computer skills. Having children explored[exposed] to such skills at an early age would ironically{â€Å"ironically† is wrong here} prepare them for mo re profession career. On the other hand, one must not ignore the detrimental effects on health of using computers continuously for extended time periods.Guidance by parents and elders is a must for a child – especially to supervise if{â€Å"verify that† sounds better} they are not addicted to any antalizing, restricted websites that contains in-decent{one word, no hypen} and violent materials. To sum up, I would concede that computer use at an early age is of pinnacle{pinnacle is a noun, not an adjective} importances and its disadvantages can be easily curbed with proper guidance and constant supervision. 3. Using a computer every day can have more negative than positive effects on children. Do you agree or disagree?Give reasons for your answer and include any relevant examples from your own knowledge or experience. Essay 1 – High Score – Band 8-91n today's modern world, computers are an essential part of everyday life. Around the globe, children often us e computers from a very young age. Although it is important for children to participate in various well-balanced activities, in my opinion, children who use the computer daily are actually developing a critical skill for future success. The bases for my views are personal, academic, and professional.From a personal point of view, computers are an invaluable resource to help young people explore the world around them. For example, children who use Internet to satisfy their curiosity about diverse topics are already becoming independent learners. No child with a computer is ever bored! By starting early in their lives, children feel totally at ease around computers; they are also able to take advantage of the wide range of services computers provide. From an academic viewpoint, children have no choice but to master this technological invention.For instance, when I was in university, students brought their laptops to class to take notes, do research and exchange information. They wrote assignments, created presentations and developed databases. Children who build early confidence and experience in these abilities are at a distinct advantage over those who have not. From a rofessional perspective, the computer has found a permanent place in the workplace. Today, employers still pay to provide computer training to their employees. Tomorrow, corporations will expect prospective Job applicants to already possess these critical Job skills.Consequently, parents who encourage their child to use the computer for a reasonable period of time daily are in fact investing in the child's future career. In conclusion, there is no doubt that the computer as a technological tool is nere tos y ta . The sooner children better for many aspects of their future lives. become computer I iterate 4. thank you for your advices 🙂 I posted my re-writing essay. Check it out 🙂 Computers are one of the important thing in our life. It always participates in our various life. E veryday everyone use computers for different interests.We use them for work, for our personal interests. Nowadays basically only children and adults over 16 years old such as students often use PC. Of course students use them or preparing a reports or to learn something curiosity. In this essay I will give academic uses of computers for children, but I will also disagree with children spending too uch leisure time using computers. First of all, I think computers can be useful for three reasons. Firstly, it helps people explore the world around them. For instant, children who use Internet to learn different topics, sooner becoming independent learners.Secondly, from nowadays most school started teaching subjects using computer, owing to it children are going to have more technical skills. We can see each student bringing their laptops to write notes during lectures, share information and do research. Lastly, PCs are found in every kind of office. In the future, ompanies will demand f rom employee skills of using computers well. Therefor kids who have already learnt how to use computer rightly, it will be easy for them in the future. On the other hand, kids should not play computer every time.It seems to me that they need to spend all their free time hanging out with friends, to read more books, newspapers and listen to radio. I like the way of living our parents and grandparents did in the past. Due to those times, children used to evolve better than nowadays. So, parents should be a little bit strict to their kids, permit to spend all heir time with computer. They should be careful and always look after them. Kids need to be close to the Nature! In the end I would like to add that, computers can be 0K but I think children should not use them too much! 26 words! 5. IELTS SAMPLE ESSAYS: Using a computer every day can have more negative than positive effects on your children. Do you agree or disagree? Posted by Muhammad Gulzar on 04:02 I tend to agree that young c hildren can be negatively affected by too much time spent on the computer every day. This is partly because sitting in front of a screen for too ong can be damaging to both the eyes and the physical posture of a young child, regardless of what they are using the computer for. However, the main concern is about the type of computer activities that attract children.These are often electronic games that tend to be very intense and rather violent. The player is usually the ‘hero' of the game and too much exposure can encourage children to be self-centred and insensitive to others. Even when children use a computer for other purposes, such as getting information or emailing friends, it is no substitute for human interaction. Spending time with other children and sharing non-virtual experiences is an important part ot a child's development that cannot be provided by a computer. n spite of this, the obvious benefits of computer skills for young children cannot be denied. Their adult world will be changing constantly in terms of technology and the Internet is the key to all the knowledge and information available in the world today. Therefore it is important that children learn at an early age to use the equipment enthusiastically and with confidence as they will need these skills throughout their studies and working lives. think the main point is to make sure that young children do not overuse computers.Parents must ensure that their children learn to enjoy other kinds of activity and not simply sit at home, learning to live in a virtual world. 6. Using a computer every day can have more negative than positive effects on young children. Do you agree or disagree? Children use computers more than ever before these days. They can be found surfing the internet, playing on-line games and on social network sites. Sometimes, especially when there is no parental control, they can spend too much time daily on computers.

Euphemism in Cross-Cultural Communication

Cross-Cultural Communication Vol. 8, No. 6, 2012, pp. 66-70 DOI:10. 3968/j. ccc. 1923670020120806. 1356 ISSN 1712-8358[Print] ISSN 1923-6700[Online] www. cscanada. net www. cscanada. org Cross-Cultural Contrastive Study of English and Chinese Euphemisms WANG Xiaoling[a]; ZHANG Meng[a],*; DONG Hailin[a] [a] College of Foreign Languages, Hebei United University, West Xinhua Road, Tangshan, China. * Corresponding author.Supported by Study on Application of Cross-Cultural Teaching Concept in New Standard College English Teaching; Key Project of Ministry of Education for the Year 2010, the Eleventh Five-year Plan for Educational Sciences (Grant No. gpa105030). Received 18 August 2012; accepted 7 December 2012 Abstract The use of euphemisms is a common linguistic phenomenon in all languages. By using euphemisms, people can indirectly and politely express their ideas, without making the listeners feel awkward and unpleasant. As a mirror of culture, the generation and development of euphemis ms are closely related to culture.Euphemisms in English and Chinese are also abundant, but they have both differences and similarities in expressions and cultural connotations. The cross-cultural contrastive study of English and Chinese euphemisms can help people correctly understand the deep meaning in English and Chinese languages and overcome the obstacles in crosscultural communications. Key words: Euphemisms; Culture; Cross-culture; Contrastive study WANG Xiaoling, ZHANG Meng, DONG Hailin (2012). CrossCultural Contrastive Study of English and Chinese Euphemisms.CrossCultural Communication, 8 (6), 66-70. Available from: http://www. cscanada. net/index. php/ccc/article/view/j. ccc. 1923670020120806. 1356 DOI: http://dx. doi. org/10. 3968/j. ccc. 1923670020120806. 1356. â€Å"speech†, so the word â€Å"euphemism† literally means â€Å"word of good omen†. Routledge Dictionary of Language and Linguistics (2000) defines â€Å"euphemism† as â€Å"A kind of expressing method which aims at making people feel less embarrassed by using some words with vague and ambiguous meaning instead of those which may make people feel unpleasant and not respected†.The generation of euphemism has its social foundation. While communicating with others, people often face the situation where they can not directly express what they want to say, or sometimes a direct expression will cause the listeners awkward and unpleasant. In these cases, people tend to choose an indirect and roundabout way to express their ideas and thoughts, so as to avoid the embarrassment. With this purpose, euphemisms come into being. Whereas the use of euphemisms is not only a social phenomenon, it is also a cultural one.The generation of euphemism is also closely related to culture. Due to the low social productivity in the early stage of human society, people were lack of scientific and cultural knowledge, thus there existed a superstitious belief that the direct call of t he name of God or a ghost will bring them bad fortune. Then the names of God and ghosts became language taboo and people found substitutes of these names. These substitutes then became euphemisms of that time. With the development of the society, euphemisms in all languages also changed.And this on-going change has always being relying on culture. Different nations possess different natural environment, social patterns, ideological systems, modes of production and values. All these can be reflected in the use of language, including the use of euphemisms. 1. EUPHEMISM AND ITS RELATION WITH CULTURE The word â€Å"euphemism† originated from a Latin word. Its prefix â€Å"eu† means â€Å"good†, and â€Å"phemism† means 2 . C U LT U R A L S I M I L A R I T I E S A N D DIFFERENCES REFLECTED BY ENGLISH AND CHINESE EUPHEMISMS When we compare different cultures, we will find that theCopyright  © Canadian Academy of Oriental and Occidental Culture 66 WANG Xiaolin g; ZHANG Meng; DONG Hailin (2012). Cross-Cultural Communication, 8 (6), 66-70 similarities and differences of the developing course of human society are manifested in cultures. Language is not only the mirror of culture, but also a part of culture. So the similarities and differences of cultures are undoubtedly reflected by English and Chinese languages, including euphemisms. 2. 1 Cultural Similarities Reflected by Euphemisms Euphemism as a cultural phenomenon has its specific role to play in culture.Cultural similarities reflected by English and Chinese euphemisms can be concluded by the functions of euphemisms. Basically speaking, the functions of English and Chinese euphemisms are the same, which can be divided as taboo-avoiding function, politeness function, and deception function. These functions show the universal characters of human culture. 2. 1. 1 Taboo-Avoiding Function In English and Chinese, there are some words that cannot be directly said out.For example, during the ti me when Christianity was prevalent in the western countries, the name of God â€Å"Jehovah† became the biggest taboo, so many euphemisms were created to replace the name, such as â€Å"the Almighty†, â€Å"the Supreme Being†, â€Å"Holy one†, â€Å"the Eternal†, â€Å"the Creator†, â€Å"the Maker†, â€Å"the Savior†, â€Å"the light of the world†, â€Å"the Sovereign of the Universe†, â€Å"Our Father†, etc.. In ancient China, the names of emperors are also tabooed. For example, Qin Shi Huang, the first emperor of China, changed â€Å" † (the first month of a lunar year) into â€Å" † so as to avoid the pronunciation of the character â€Å"? which is the same as the character â€Å"? † used in his name. Another example is the euphemistic expression of â€Å"death†. People generally believe that the greatest misfortune is nothing than death, so there are taboos and euphemisms ab out death both in English and Chinese. The word â€Å"death† cannot be directly mentioned, and euphemisms about death are various. In English, the word â€Å"die† can be replaced by â€Å"to pass away†, â€Å"to expire†, â€Å"to be no more†, â€Å"to breathe one’s last†, â€Å"to come to an end†, â€Å"to join the majority†, â€Å"to go to one’s rest†, â€Å"to sleep the final sleep†, â€Å"to be gathered to one’s father†, â€Å"return to dust†, â€Å"run one’s race†, â€Å"be no onger with us†, â€Å"to be at peace†, â€Å"to be at rest†, â€Å"to be asleep in the arms of God/ Jesus†, â€Å"pay the debt of nature†, etc.. In Chinese, the word â€Å"? † can be replaced by â€Å" † etc.. 2. 1. 2 Politeness Function It is a normal human psychology for everybody to be respected and keep dignity before the others. So to avoid hurting others’ feelings and pride in a conversation, people often use euphemistic expressions in stead of words that will lead to the unwanted result. For instance, in Chinese, people will call those who are physical handicapped â€Å"? ?† in stead of â€Å" . Similarly, in English, the word â€Å"handicapped† is euphemistically expressed by â€Å"disabled† to show people’s respect. The â€Å"deaf† people are described as â€Å"hard of listening†, and â€Å"blind† people are â€Å"the visually challenged†. At present, euphemisms about body figure are more often used than ever before. As more and mo re people pay attention to their figure, you need to be careful while talking to those who have much weight. The word â€Å"fat† could never be used. But you can use words like â€Å"plump, stout, out-size, over-weight† to describe such person. In Chinese, it is also more polite to use words like â€Å" † etc..The politeness function of euphemisms is well demonstrated by the description of these low or humble occupations. To some extent, the occupations people are engaged in can show their social status, so people in the low hierarchy are usually sensitive towards their jobs. A decent and respectful call of their occupation will show respect for such persons. Therefore, â€Å"sanitation engineer† is created for â€Å"garbage collector†, â€Å"cleaning operative† is created for â€Å"road-sweeper†, â€Å"domestic help† is created for â€Å"maid† and â€Å"security officer† is created for â€Å"janitor†. In modern Chinese, there are also similar euphemisms about occupations.For example, people call â€Å" † in stead of â€Å" †, and â€Å" ?† or â€Å" † in stead of â€Å" †. These euphemisms about occupations not only show the raise of civilization level, but also people’s awaren ess of social equity. 2. 1. 3 Deception Function With the development of the society, the use of euphemisms is not only limited in avoiding taboos and caring for the listeners’ feelings. On many occasions, it is also employed to hide the facts, and to achieve some ulterior goals. Euphemisms of this kind are widely seen in political and economic areas to deceive the public or distort the pacts.For example, words used in war, such as â€Å"invasion† and â€Å"raid† are disguised as â€Å"incursion†, â€Å"involvement† and â€Å"military action†; Failure in a war is disguised as â€Å"break off contact with enemy†; The thousands of homeless people in the war are called â€Å"transfer of population†; â€Å"Attack† is disguised as â€Å"active defense†, etc.. These cosmetic words conceal the nature and cruelty of war, and provide reasonable excuse for waging wars. For politicians, these euphemistic words are good tools to whitewash themselves and protect themselves from being excused or charged. Euphemisms in the economic area are also widely seen.For example, â€Å"economic crisis† is replaced by â€Å"depression† or â€Å"recession†; â€Å"poor nations† is replaced by â€Å"underdeveloped nations†, â€Å"developing nations†, or â€Å"emerging nations†. These words all cover up the reality to some extent, and the real meaning of these words need careful thinking. 2. 2 Cultural Differences Reflected by Euphemisms Due to the culture difference between English and Chinese, a topic often being talked about in one culture 67 Copyright  © Canadian Academy of Oriental and Occidental Culture Cross-Cultural Contrastive Study of English and Chinese Euphemisms ay be tabooed in another culture, and something unacceptable in one culture may be quite normal in another. 2. 2. 1 Different Attitudes Towards â€Å"Old Age† The westerners are afraid of old age. In their opinion, old age indicates decay. So in many western countries, inquiring others’ age is seen to be an offense, because â€Å"age† is a sensitive topic. There are many euphemisms describing old age, such as â€Å"senior citizen, advantage in age, the mature, seasoned man, full of ages, be feeling one’s ages, past one’s prime† etc.. On the contrary, it is a tradition for Chinese people to respect the old.As far as Chinese people are concerned, â€Å"old age† stands for wisdom and experience. In Chinese, people often add the word â€Å"? † after a person’s family name to show his respect, such as â€Å" † and â€Å" †. Besides, the word â€Å"? † can also be added before a person’s family name to show intimacy with this person, such as â€Å" †, â€Å" †. If a person has much experience in an occupation and is respected by others, people will call him or her â€Å" ?† â€Å" † or â€Å" † etc.. Other words indicating old age like â€Å" † all show respect to these old people. 2. 2. Attitudes Towards Privacy The westerners attach much importance to privacy, which includes age, marriage, income, religious belief, political tendency etc. , and they do not want the others to know much about these contents. For example, a western lady will take an immediate aversion if she is asked about her age and marriage state. While in China, you can often hear people around talking about age, marriage and even income. Topics like â€Å" †, â€Å" †, â€Å" †, â€Å" † are not forbidden either. Inquiring others’ salary or the price of some private belongings is also seen as impolite in the west.If you really want to know the price of an item, you can ask â€Å"It is expensive? † in stead of directly asking â€Å"How much is it? † But in China, you will have no worry to ask the price. Religious belief and political tendency are also private in the west. Questions like â€Å"What party do you vote for? † and â€Å"What’s your religion? † cannot be asked. But in China, these questions are also free to ask. 2. 2. 3 Naming and Appellation Chinese people attach more importance to family than people in the west, and their respect for the elder generation is also shown in naming and appellation.The name of a young should not be the same as his or her elder generation, even the pronunciation should be different. Young people could not directly call the name of the elderly ones; Instead they call them according to the rank in the family such as â€Å" , , , ? ?† etc.. Comparatively, English-speaking people do not have such strong sense of family rank and social stratum. In the western countries, there is no taboo in naming and appellation. People of different rank in the family hierarchy and social status could call each other’s name directly. It is common to hear children call their parents and even grandparents’ names.And it is also very common for a younger person to have a same name with the elder generation. The westerners believe this kind of appellation and naming is a way of showing intimacy and will draw close the relationship between people. To some extent, it reflects the westerners’ pursuit of equality. 2. 2. 4 The Use of Numbers Cultures about numbers exist in both Chinese and English. There are different taboos about number in different cultures. In the western culture, the number 13 is seen as an unlucky number which people tend to avoid in their daily life.For example, it is rare to see 13 people gather around the same table while having dinner or meetings. It is also forbidden to have 13 dishes on the dinner table. House number, storey number and other number marks all avoid using this number. In Chinese, the pronunciation of â€Å"4† is similar to the character â€Å"? † (die) , so people are unwilling to use this number in doorplate, story number, phone number etc.. The pronunciation of number â€Å"3† is similar to the character â€Å"? †, so weddings and birthday parties are not held on this day.Besides, there is a saying in Chinese that good things should be in pairs, so it is also a tradition to hold important things on even number days, so as to wish that good luck could come. 3. EUPHEMISMS AND CROSSCULTURAL COMMUNICATION 3. 1 The Definition of Cross-Cultural Communication Chinese scholar JIA Yuxin and GUAN Shijie defined cross-cultural communication as â€Å"communication between people from different cultural background† (JIA, 1997) and â€Å"communication between people or group from one cultural background and people or group from another cultural background† (GUAN, 1996).Larry offered his definition of â€Å"intercultural communication† as â€Å"Intercultural communication is communication between people whos e cultural perceptions and symbol systems are distinct enough to alter the communication event† (Larry, 2009). In conclusion, inter-cultural communication, which is a kind of communication behavior, is the communication between people from different cultural background, social psychology, and people speaking different languages. 3. The Influence of Culture Differences on Cross-Cultural Communication While communicating with a person of another language, people always carry out the communication process on the basis of their own language and culture. Obviously culture differences will manifest themselves in the understanding and use of euphemisms throughout cross-cultural Copyright  © Canadian Academy of Oriental and Occidental Culture 68 WANG Xiaoling; ZHANG Meng; DONG Hailin (2012). Cross-Cultural Communication, 8 (6), 66-70 communication. Thus cross-cultural understanding barrier or improper use of euphemisms will lead to pragmatic failures. . 2. 1 Pragmatic Failures Cause d by Different Expression Modes English and Chinese euphemisms are typically different in structure and expression mode. Because of these differences, speakers of one language often have difficulty in grasping the information of another language. For example, Chinese speakers will be confused when they hear those English euphemisms consisted by numbers like â€Å"go to the fourth† (go to the toilet) and â€Å"a forty-four† (a prostitute). There are also some euphemisms in the form of abbreviation, like B. O. (body odor), V. D. C. (venereal disease), and T. B. tuberculosis), which will lead to understanding difficulty if the readers are lack of relative background information. Similarly, the profound Chinese culture has given birth to quantities of unique expressions, such as â€Å" †, â€Å" †, â€Å" †, which also make the westerners confused. Besides, the use of twopart allegorical sayings, such as â€Å" — (? )†, â€Å" — à ¢â‚¬ , and â€Å" — (? )† etc. is also a unique feature of Chinese euphemisms. The use of this special structure can help release the mood in an over straightforward Chinese expression, and help readers guess the meaning inside it.But the English readers are not familiar with this kind of Chinese expressions, so they can only sigh towards the contained meaning inside this kind of euphemisms. 3. 2. 2 Pragmatic Failures Caused by Different Value Orientations in Euphemisms The cultural value difference of euphemisms is best illustrated by words in political and social area. Many euphemistic words in political area are used to conceal the real political purpose. For example, in the Vietnam War, the U. S. government called the invasion â€Å"U. S. nvolvement in Vietnam†; The air raid to Libya is called â€Å"surgical strikes†; Civilian casualties in the Iraq War are understated as â€Å"collateral damage†. These euphemisms reflect the subtle attitude of the U. S. government to some extent, and at the same time, they show the handiness and concealment of political words. It is easy to be cheated by these diplomatic words without enough cross-cultural study. For another example, in the western countries, the word â€Å"sexy† is used to describe an attractive and charming person. If a lady is described as â€Å"sexy†, she will take it as praise and will be very happy.But in traditional Chinese culture, the connotation of â€Å"sexy† is somewhat close to â€Å"coquettish†. If a westerner who does not know much about Chinese culture describes a Chinese lady as â€Å"sexy†, she must feel uncomfortable and take it as an insult rather than praise. But with China enhancing its communication with the western countries, more and more Chinese people have accepted the western culture and began to praise others as â€Å"sexy†. 3. 2. 3 Pragmatic Failures Caused by Different Class Concept Many words in our daily life such as â€Å"big and small†, â€Å"high and low†, â€Å"good and bad†, â€Å"rich and poor† all indicates social rank.Compared with Chinese, English euphemisms about social rank are larger in quantity and more alert in usage. For example, in the western countries, people advocate democracy and pursuit gender equality, so they have much difficulty in understanding males in Chinese feudal society calling their wives â€Å" † and â€Å" †. English-speaking people are also alert to the rank below â€Å"the first class†. So in 1989, when West Germany held the 56th World Foundry Congress, the English instruction classified hotels as follows: A) Deluxe B) First Class C) Standard D) Private rooms.This kind of ranking criteria does not define the hotels below the first class into â€Å"the second class† and â€Å"the third class†, thus avoiding people’s psychological gap. At the same time, it upgrades each class invisibly. However this kind of ranking is difficult for Chinese people to understand and use. In cross-cultural communication, in order to avoid these pragmatic failures, language user of both English and Chinese need to sharpen their cross-cultural awareness. It is also necessary to acquire as many as possible euphemistic expressions in another language.The more characteristics we know about the culture and its euphemisms, the less barriers and pragmatic failures we will encounter. Of course, we should also bear in mind the proper situation where a certain euphemism is used; otherwise the overuse of euphemisms will appear to be pretentious and unnatural. CONCLUSION To sum up, euphemism is a common and long-standing linguistic as well as socio-cultural phenomenon in both English speaking countries and China. As a mirror of culture, euphemisms strongly reflected similarities and differences between English and Chinese cultures.These similarities and differences have brought ab out conveniences and difficulties in the process of crosscultural communication. Only when people from different cultures are fully aware of the different cultural background, cultural value orientations and cultural conventions, can they remove pragmatic barriers and carry out smooth and harmonious communication successfully. REFERENCES Bussmann (2000). Routledge Dictionary of Language and Linguistics. Beijing: Foreign Language Teaching and Research Press. CAI, Yan (2005). Similarities in Communicative Functions Between English and Chinese Euphemism.Journal of Xihua University, (1). 69 Copyright  © Canadian Academy of Oriental and Occidental Culture Cross-Cultural Contrastive Study of English and Chinese Euphemisms CHEN, Junsen (2000). Foreign Cultures and International Communication. Wuhan: Huazhong University of Science and Technology Press. DENG, Xinghua (1996). Contrastive Study on Chinese and English Taboos and Euphemisms. Journal of Liuzhou Teachers College, (1). DENG, Yanc hang, & LIU, Runqing (2001). Language and Culture. Beijing: Foreign Language Teaching and Research Press. GUAN, Shijie (1996). Intercultural Communication. Beijing: Peking University Press.GUO, Hongmei (2005). English and Chinese Euphemisms and the Development of Western and Chinese Cultures. Journal of Taiyuan University, (12), 61-62. HU, Yonghong (2001). On English and Chinese Euphemisms. Journal of Mianyang Teachers College, (8), 53-54. JIA, Yuxin (1997). Intercultural Communication. Shanghai: Shanghai Foreign Language Education Press. Larry, A. Samovar, Richard, E. Porter, & Edwin, R. McDaniel (2009). Communication Between Cultures. Beijing: Peking University Press. LI, Zhongsheng (1991). Taboos and Customs in Chinese Language. Xi’an: Shanxi People’s Press. PAN, Min (2004).Comparative Analysis of English and Chinese Euphemism. Journal of Huaiyin Institute of Technology, (8), 42-44. XUE, Yan (2001). On English Euphemisms. Journal of Lanzhou Commercial College, (12), 108-111. Copyright  © Canadian Academy of Oriental and Occidental Culture 70 Copyright of Cross-Cultural Communication is the property of Canadian Academy of Oriental & Occidental Culture and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use.

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Diversity, equality and inclusion in a work setting Essay Example for Free

Diversity, equality and inclusion in a work setting Essay Diversity means variety. The concept of diversity encompasses acceptance and respect. It means understanding that each individual is unique, and recognizing our individual differences. These can be along the dimensions of race, ethnicity, gender, sexual orientation, socio-economic status, age, physical abilities, religious beliefs, political beliefs, or other ideologies. It is the exploration of these differences in a safe, positive, and nurturing environment. It is about understanding each other and moving beyond simple tolerance to embracing and celebrating the rich dimensions of diversity contained within each individual. Diversity is a reality created by individuals and groups from a broad spectrum of demographic and philosophical differences. It is extremely important to support and protect diversity because by valuing individuals and groups free from prejudice, and by fostering a climate where equity and mutual respect are intrinsic. Diversity means more than just acknowledging and/or tolerating difference. Diversity is a set of conscious practices that involve: ï‚ §Understanding and appreciating interdependence of humanity, cultures, and the natural environment. ï‚ §Practicing mutual respect for qualities and experiences that are different from our own. ï‚ §Understanding that diversity includes not only ways of being but also ways of knowing; ï‚ §Recognizing that personal, cultural and institutionalized discrimination creates and sustains privileges for some while creating and sustaining disadvantages for others; ï‚ §Building alliances across differences so that we can work together to eradicate all forms of discrimination. Diversity includes, therefore, knowing how to relate to those qualities and conditions that are different from our own and outside the groups to which we belong, yet are present in other individuals and groups. These include but are not limited to age, ethnicity, class, gender, physical abilities/qualities, race, sexual orientation, as well as religious status, gender expression, educational background, geographical location, income, marital status, parental status, and work experiences. Finally, we acknowledge that categories of difference are not always fixed but also can be fluid, we respect individual rights to self-identification, and we recognize that no one culture is intrinsically superior to another. Health and social care settings reflect the diversity of the population at large. Residents in a care home for elderly people – men and women, possibly gay and lesbian may range in age from 60 to well into their ninth decade. Each will have their own set of personal expe riences and in locations with an immigrant community, may hail from a variety of different countries. And preferences, for example for food and music, will vary from one person to another, as will attitudes, for example to staff and fellow residents, beliefs, for example political ideas and religious faiths, health status and physical and intellectual ability. Apart from differences in age, sex and gender, physical characteristics, ability, experiences and personal attributes, people also differ in respect of their: Diet, for example different health conditions mean that some people have specific dietary needs, and vegetarians and vegans can’t take medication that is derived from animals. Religious faith, for example some religions have specific requirements with respect to diet and method of worship, others require the use of running water to maintain personal hygiene, the right hand for eating and the left for personal cleansing after using the toilet, and so on. Need for modesty and dignity, for example some people aren’t comfortable being touched or seen undressed by someone of the opposite sex or that they don’t know; and different people have different ideas about how to be addressed when being spoken to. Communication, for example different physical and mental health conditions require the use of different methods of communication; some people express their fear, pain and grief freely and openly whilst others are more reserved; and different people have different ideas about the extent of their personal space. Working with and getting to know a diverse range of people – service users, patients, their friends and family, colleagues and other professionals enables health and social care workers to develop their knowledge and understanding of different ways of thinking and living and the reasons for different behaviours. As a consequence, tolerance of and respect for others develops, both of which are essential for meeting diverse – and individual – needs. And having their differences acknowledged and understood helps people to develop a sense of belonging. In addition, learning about different ways of thinking and living can be life-enriching. We become more open-minded to new experiences, opportunities and challenges, and are able to develop new relationships. As a result we grow as human beings and are able to achieve our full potential. Equality Equality is about treating people fairly, regardless of their differences, by ensuring that they have access to the same life opportunities as everyone else, ie that they have equal opportunities. Life opportunities include: Housing. Warmth and shelter are basic human needs. Education and employment. Just about everybody is capable of learning, and education not only enables us to find employment, it helps us to realize our full potential as human beings. Transport, without which we couldn’t get to work, to the shops, to see friends and family, to gp and hospital appointments, and so on. Health and social care, which all of us need at some point in our lives. Having enough money to buy a decent quality of life and not live in poverty. Being able to buy goods and services, in person, by telephone or online using cash, cheques, credit or debit cards or electronic transfer. Some people need extra help to access life opportunities. For example, having a physical or sensory disability can impact on gaining an education, a job, using public transport, getting to the doctors; and being elderly or mentally ill can affect an individual’s ability to maintain a decent standard of living, buy goods and services, speak up for themselves and have others listen to them. For this reason, equality is also about giving people help, providing them with appropriate services, so that they are not disadvantaged or treated less fairly than anyone else. People are disadvantaged for many reasons, but usually because they are different with respect to their: Appearance. Racial harassment and attacks are usually acted out on people whose appearance, for exam ple their skin colour and style of dress, is different from that of the perpetrator. Sex. Men are still more likely to be better paid than women and to reach the top of the career ladder, and some jobs are still perceived and advertised as being ’women’s’ or ‘men’s’ work. Sexual orientation. Gays and lesbians remain subject to physical and verbal abuse. Age. Older people often describe themselves as invisible, undervalued and a burden because of the way society treats them. Ability. A general lack of understanding about the needs of people with physical or mental disabilities results in them finding it very difficult to make the most of life’s opportunities. Imposing disadvantage on people can prevent them from entering into the everyday life of their community and of society. In other words they can become socially and financially excluded. Inclusion The term inclusion is seen as a universal human right and aims at embracing all people irrespective of race, gender, disability, medical or other need. It is about giving equal access and opportunities and getting rid of discrimination and intolerance. Inclusion nurtures a sense of wellbeing and of confidence in ones own identity and abilities. And it ensures that everyone can achieve their potent ial and take their rightful place in society. The potential effects of discrimination A prejudice is an attitude or way of thinking based on an unfounded, unreasonable pre-judgement of an individual, particular group of people or situation, rather than on a factual assessment. Prejudices can be positive or negative. If we are positively prejudiced towards someone, we think well of them. On the other hand, if we are negatively prejudiced against someone, we tolerate them less. In the main, negative prejudices develop against people who are different in some way. Discrimination happens when we act out our negative prejudices. Discriminatory behaviour results in unfair, unjust treatment. The people most likely to be discriminated against are those who are different in respect of their: Age. Age discrimination, or ageism, isn’t only targeted at elderly people – youngsters can also be on the receiving end of bullying, harassment and undeserved criticism. Sex. Men and women continue to be treated unfairly in certain walks of life, in particular in the workplace. Discrimination based on sex is known as sexism. Nationality, ethnic background, religion. Some people consider themselves superior to those from different backgrounds and faiths. Victimisation, bullying and harassment of people for such reasons is known as racism. Ability. Barriers that prevent disabled people from accessing the same opportunities as able-bodied people and the ignorant acting out of negative prejudices against physically or intellectually disabled people, for example through namecalling and damage of their property, is known as disablism. Size. Some of us are guilty of judging people by their size and treating them unfairly as a result. This behaviour is known as sizeism. Financial status. Discrimination against people on the grounds of their income, for example treating people living in poverty as inferior, is known as povertyism. There are two forms of discrimination, direct and indirect. Direct discrimination occurs when someone is intentionally treated unfairly, for example harassment on the basis of skin colour or religion. Indirect discrimination occurs when rules or guidelines meant to apply to everyone unintentionally affect one group of people more than others. For example, a company policy requiring everyone to work night shifts indirectly discriminates against single parents or people who care for elderly relatives, and menus that fail to offer a selection of food indirectly discriminates against people with specific dietary needs or preferences. Discrimination takes place in a variety of settings, for example within educational establishments, where learners may not be given support and encouragement if it’s assumed that their disability or advancing years affects their ability to learn; in the workplace, when people are persecuted on the basis of their skin colour or sexual preference. In housing, when landlords refuse to let their property to someone because of their refugee status or ethnic background; and in health and social care, when people are denied access to care on the basis of where they live – the postcode lottery. Inclusive work practice Inclusive practice is about the attitudes, approaches and strategies take n to ensure that people are not excluded or isolated. It means supporting diversity by accepting and welcoming people’s differences, and promoting equality by ensuring equal opportunities for all. Inclusive practice is best practise. Health and social care workers demonstrate inclusive practice by working in ways that recognise, respect, value and make the most of all aspects of diversity. Having a sound awareness of and responding sensitively to an individual’s diverse needs supports them in developing a sense of belonging, wellbeing and confidence in their identity and abilities. And it helps them to achieve their potential and take their rightful place in society. In addition, inclusive practice involves having an understanding of the disastrous impact that discrimination, inequality and social exclusion can have on an individual’s physical and mental health. Having such an understanding ensures appropriate, personalised care and support, thereby enabling an individual to develop selfrespect and maintain a valued role in society. Because people who fail to support diversity or promote equality are usually entirely unaware of their attitudes and the impact of their behaviour, inclusive practice in volves reflecting on and challenging ones own prejudices, behaviours and work practices. It also involves challenging those of colleagues and other service providers, with a view to adapting ways of thinking and working and to changing services to build on good practice and to better support diversity and promote equality. Discrimination is an injustice and has devastating effects. The UK has in place numerous pieces of legislation (laws), rules, regulations, guidance documents and statutory codes of practice, all of which are intended to promote diversity, ensure equality and end discrimination. In other words they are in place to promote everyone’s right to fair and equal treatment, regardless of their differences. Acts of Parliament and regulations include: ï€  Ã¯â‚¬  The Human Rights Act 1998. This covers many different types of discrimination, including some that are not covered by other discrimination laws. Rights under the Act can be used only against a public authority, for example, the police or a local council, and not a private company. However, court decisions on discrimination usually have to take into account what the Human Rights Act says. The Equality Act became law in October 2010. It replaces previous legislation (such as the Race Relations Act 1976 and the Disability Discri mination Act 1995) and ensures consistency in what you need to do to make your workplace a fair environment and to comply with the law. The Equality Act covers the same groups that were protected by existing equality legislation age, disability, gender reassignment, race, religion or belief, sex, sexual orientation, marriage and civil partnership and pregnancy and maternity but extends some protections to groups not previously covered, and also strengthens particular aspects of equality law. The Equality Act is a mixture of rights and responsibilities that have: Stayed the same for example, direct discrimination still occurs when someone is treated less favourably than another person because of a protected characteristic Changed for example, employees will now be able to complain of harassment even if it is not directed at them, if they can demonstrate that it creates an offensive environment for them Been extended for example, associative discrimination (direct discrimination against someone because they associate with another person who possesses a protected characteristic) will cover age, disability, gender reassignment and sex as well as race, religion and belief and sexual orientation Been introduced for the first time for example, the concept of discrimination arising from disability, which occurs if a disabled person is treated unfavourably because of something arising in consequence of their disabilit. Other pieces of legislation that protect the rights of people who use care services include: The NHS and Community Care Act 1980. This protects the rights of older and disabled people to receive care at home and in the community in ways that take account of their choices. The Children Act 2004. This protects children’s rights by requiring Local Authorities to be flexible in meeting their needs. Health and Social Care Act 2008. This Act established the Care Quality Commission (CQC), the remit of which is to protect and promote the right of people using health and social care services in England to quality care and to regulate its provision. CQC took over the roles of the Healthcare Commission, Commission for Social Care Inspection and the Mental Health Act Commission in March 2009. These pieces of legislation have helped us move forward on equality, but in 2009, women were still earning, on average, 23% less per hour than men; less able but better off children were overtaking m ore able, poorer children at school by the age of six; people with disabilities were still more than twice as likely to be out of work than able bodied people; and one in five older people was unsuccessful in getting quotations for motor insurance, travel insurance and car hire.

Natural Recycling of Aggregate

Natural Recycling of Aggregate Introduction For many years peoples have been trying to keep the environmental clean and mention the natural balance of life. The scientific studies provide us the information and methods to achieve these objectives and the recycling of waste and by product materials represent the main role in these studies [1-4]. As a result of reconstruction of existing buildings and pavements, wars and natural disasters such as earthquakes the amount of construction and demolition materials are increasing every year. At the same time approval of additional facilities for waste disposal or treatment are become more difficult to obtain. Furthermore increasing restrictive environmental regulations have made waste disposal more difficult and expensive. Also the available natural aggregate in some countries decreases and may be become insufficient for the construction projects in these countries in the future [5]. So, the reuse of construction and demolition materials in construction has benefits not only in reducing the amount of materials requiring disposal but also can provide construction materials with significant saving of the original materials. According to the third Building Waste Monitoring Report [6], there is an increase in the recorded amount of building waste in the sectors of the building debris, road scarification and building site waste. It has arisen in Germany by 11.5 million tons, from 77.1 million tons in the period 1997/1998 to 88.6 million tons in the period 1999/2000. According to Rahlwes and Schmidt [7, 8], for concrete only, the annual crushed concrete quantity in west Germany only is about 30 million tones and in the European Union is approximately 130 million ton. Due to intensive building activities in the last decades, these amounts are expected to considerably increase after the year 2000. The properties of recycled coarse aggregate with a grain size above 4 mm and its reuse in concrete production and pavements construction have been evaluated and described in many. It has been estimated that approximately 50 million tons of concrete are currently demolished each year in the European Economic Communities [1], Equivalent figures are 60 million tons in the United States ([2], [3]), and in Japan [12] the total quantity of concrete debris available for recycling on some scale is about 10 to 12 million tons. Very little demolished concrete is currently recycled or reused anywhere in the world. The small quantity which is recovered is mainly reused as unstabilized base or subbase in highway construction. The rest is dumped or disposed of as fill. For Environmental and other reasons the number of readily accessible disposal sites around major cities in the world has decreased in recent years. Both disposals volume and maximum sizes of wastes have been restricted. In Japan disposal charges from USD 3 to 10 per ton are not uncommon. Moreover, distances between demolition sites and disposal areas have become larger and transportation costs higher. At the same time critical shortages of good natural aggregate is developing in many urban areas, and distances between deposits of natural material and sites of new construction have grown larger, and transportation costs have become correspondingly higher, It is estimated that between now and year 2,000, three times more demolished concrete will be generated each year than is today. For these reasons it can be foreseen that demolition contractors will come under considerable economic and other pressure to process demolished concrete for reuse as unscreened gravel, base and subbase materials, aggregates for production of new concrete or for other useful purposes. Large-scale recycling of demolished concrete will contribute not only to the solution of a growing waste disposal problem. It will also help to conserve natural resources of sand and gravel and to secure future supply of reasonably priced aggregates for building and road construction purposes within large urban areas of the world. Applications of Recycled Aggregate The recycled concrete aggregate shown in Figure 1.1 can be defined as crushed concrete composed of aggregate fragments coated with cement paste or cement mortar from the demolition of the old structures or pavements that has been processed to produce aggregates suitable for use in new concrete. The processing, as with many natural aggregates, generally involves crushing, grading and washing. This removes contaminant materials such as reinforcing steel, remnants of formwork, gypsum board, and other foreign materials. The resulting coarse aggregate is then suitable for use in concrete. The fine aggregate, however, generally contains a considerable amount of old cement paste and mortar. This tends to increase the drying shrinkage and creep properties of the new concrete, as well as leading to problems with unworkable mix and strength. Therefore, many transportation departments have found that using 100% coarse recycled aggregate but with only about 10% to 20% recycled fines works well. Regarding the results of most of the previous research that has been done so far, the application of Recycled Aggregate is mostly currently in low quality/strength concrete, for example, pavement base and slab rather than used in structural concrete. The most common application of Recycled Concrete Aggregate is the use in concrete sub-base in road construction, bank protection, noise barriers and embankments, many types of general bulk fills and fill materials for drainage structures. After the removal of contaminants through selective demolition, screening, and/or air separation and size reduction in a crusher to aggregate sizes, crushed concrete can be used as new concrete for pavements, shoulders, median barriers, sidewalks, curbs and gutters, and bridge foundations; structural grade concrete; soil-cement pavement bases; moulded concrete bricks and blocks; bituminous concrete etc. However, there is an example of recycled concrete being used for part of the structural slabs in a high-rise building in Japan but there was no too much detail available on this project. According to research that has been conducted in Australia, current use of recycled aggregates is still only around 7% of road construction material in South Australia. Victoria Road also use recycled aggregate for their road base construction projects in Victoria but MainRoads in Queensland does not currently. Traditionally, the application of recycled aggregate is used as landfill. Nowadays, the applications of recycled aggregate in construction areas are wide. The applications are different from country to country. Concrete Kerb and Gutter Mix Recycled aggregate have been used as concrete kerb and gutter mix in Australia. According to Building Innovation Construction Technology (1999), Stone says that the 10mm recycled aggregate and blended recycled sand are used for concrete kerb and gutter mix in the Lent hall Street project in Sydney. Granular Base Course Materials According to Market Development Study for Recycled Aggregate Products (2001), recycled aggregate are used as granular base course in the road construction. It also stated that recycled aggregate had proved that better than natural aggregate when used as granular base course in roads construction. They also found that when the road is built on the wet sub grade areas, recycled aggregate will stabilize the base and provide an improved working surface for pavement structure construction. Embankment Fill Materials Market Development Study for Recycled Aggregate Products (2001) stated that recycled aggregate can be used in embankment fill. The reason for being able to use in embankment fill is same as it is used in granular base course construction. The embankment site is on the wet sub grade areas. Recycled aggregate can stabilize the base and provide an improved working surface for the remaining works. Paving Blocks Recycled aggregate have been used as paving blocks in Hong Kong. According to Hong Kong Housing Department (n.d.), recycled aggregate are used as typical paving blocks. A trial project had been started to test the long – term performance of paving blocks made with recycled aggregate in 2002. Backfill Materials Recycled aggregate can be used as backfill materials. Mehus and Lillestol (n.d) found that Norwegian Building Research Institute (n.d) mentioned that recycled concrete aggregate can be used as backfill materials in the pipe zone along trenches after having testing in laboratory. Building Blocks Recycled aggregate used as building blocks. Mehus and Lillestol (n.d) stated that Optiroc AS had used recycled aggregate to produce the masonry sound insulation blocks. The masonry sound insulation blocks that produced had met all the requirements during the laboratory testing. International Status Mehus and Lillestol (n.d.) stated that RESIBA had constructed a new high school in Sorumsand, outside the city of Oslo, Norway in 2001. Recycled concrete aggregate had been used in this project. Thirty – five percent of coarse aggregate were replaced by recycled concrete aggregate in the foundations, half of the basement walls and columns. Several tests were conducted based on fresh and hardened concrete properties and the results shown that the concrete with thirty – five percent of recycled concrete aggregate have good freeze – thaw resistance. The use of recycled concrete aggregate did not shown any noticeable increase in cracking. According to Grubl, Nealen and Schmidt (n.d.), there is a building project, the â€Å"Waldspirale† by Friedensreich Hundertwasser, made from concrete with recycled aggregate in Darmstadf from November 1998 to September 1999. Numerous tests were evaluated for freshly missed and also hardened concrete properties. The result shown that the consistency controlled method for concrete with recycled aggregate is applicable. And it leads to concrete of equal quality when compared with concrete made from natural aggregate. According to Regain (1993/94), recycled aggregate were used as capping and sub-base layers in housing development at North Bracknell, UK in 1993/94. Visual inspections and condition surveys were carried out by using the falling weight deflectometer in 1998. The result shown that the sections with recycled aggregate did not show any difference in appearance compared to the sections that using natural aggregate. The tests gave the larger values of elastic modulus in the recycled aggregate sections. According to Regain (2001), footway paving slabs are being replaced gradually in London Borough of Bexley. Recycled aggregate are used as coarse aggregate in the concrete mix with a 12:1 aggregate to cement mix Advantages There are many advantages through using the recycled aggregate. The advantages that occur through usage of recycled aggregate are listed below. Environmental Gain The major advantage is based on the environmental gain. According to CSIRO (n.d.), construction and demolition waste makes up to around 40% of the total waste each year (estimate around 14 million tones) going to land fill. Through recycled these material, it can keep diminishing the resources of urban aggregated. Therefore, natural aggregate can be used in higher –grade applications. Save Energy The recycling process can be done on site. According to Kajima Technical Research Institute (2002), Kajima is developing a method of recycling crushed concrete that used in the construction, known as the Within-Site Recycling System. Everything can be done on the construction site through this system, from the process of recycled aggregate, manufacture and use them. This can save energy to transport the recycled materials to the recycling plants. Cost Secondly is based on the cost. The cost of recycled aggregate is cheaper than virgin aggregate. According to PATH Technology Inventory (n.d.), the costs of recycled concrete aggregate are sold around $3.50 to $7.00 per cubic yard. It depends on the aggregate size limitation and local availability. This is just around one and half of the cost for natural aggregate that used in the construction works. The transportation cost for the recycled aggregate is reduced due to the weight of recycled aggregate is lighter than virgin aggregate. Concrete Network (n.d) stated that recycling concrete from the demolition projects can saves the costs of transporting the concrete to the land fill (around $0.25 per ton/ mile), and the cost of disposal (around $100 per ton). Beside that, Aggregate Advisory Service (n.d.) also state that the recycling site may accept the segregates materials at lower cost than landfill without tax levy and recycled aggregate can be used at lower prices than primary aggregate in the construction works. Job Opportunities There will be many people involved in this new technology, such as specialized and skilled persons, general workers, drivers and etc. According to Scottish Executive (2004), a Scottish Market Development Program is developed. The purpose of this program is to recycle the materials that arising in Scotland. This program will provide 150 new jobs in the Scottish industry. Sustainability The amount of waste materials used for landfill will be reducing through usage of recycled aggregate. This will reduce the amount of quarrying. Therefore this will extend the lives of natural resources and also extend the lives of sites that using for landfill. Market is Wide The markets for recycled concrete aggregate are wide. According to Environmental Council of Concrete Organization (n.d), recycled concrete aggregate can be used for sidewalk, curbs, bridge substructures and superstructures, concrete shoulders, residential driveways, general and structural fill. It also mentioned that recycled concrete aggregate can be used in sub bases and support layers such as unstabilized base and permeable bases. Disadvantages Although there are many advantages by using recycled aggregate. But there are still some disadvantages in recycled aggregate. Hard to have permit Jacobsen (1999) stated that it is hard to get the permit for the machinery that needed air permit or permit to operate during the recycling process. These has to depend on the local or state regulations whether this technology is implemented or not. Lack of Specification and Guidelines According to Kawano (n.d), there is no specification or any guideline when using recycled concrete aggregate in the constructions. In many cases, the strength characteristic will not meet the requirement when using recycled concrete aggregate. Therefore, more testing should be considered when using recycled concrete aggregate. Water Pollution The recycled process will cause water pollution. Morris of National Ready Mix Concrete Association (n.d) had mentioned that the wash out water with the high pH is a serious environmental issue. According to Building Green (1993), the alkalinity level of wash water from the recycling plants is pH12. This water is toxic to the fish and other aquatic life. Project Aim The aim for this on – going project is to determine the strength characteristic of recycled aggregate for application in high strength structural concrete, which will give a better understanding on the properties of concrete with recycled aggregate, where can be an alternative material to coarse aggregate in structural concrete. Project Scope Review and research of recycled aggregate. Construct the concrete specimens by using different percentage of recycled aggregate. Investigation and laboratory testing on high strength concrete with recycled aggregate. Analysis the results and recommendation for further research area. Dissertation Overview This dissertation is structured in the following format. Chapter 2 provides a review of relevant literature, overview of recycling process, as well as comparison of recycled aggregate and natural aggregate. This chapter also discussed the previous investigation and testing done with recycled aggregate. Chapter 3 includes the preliminary design and information on the recycled  aggregate testing and design of the concrete mix. Chapter 4 describes the experimental methodology carried out in order to obtain the required data. Chapter 5 discusses the results and analysis of all experimental results obtained from the testing procedures. Chapter 6 contains the conclusions of the research and recommendations on further work. Literature review of Recycled Aggregate Literature review of Recycled Aggregate Conventional concrete aggregate consists of sand (fine aggregate) and various sizes and shapes of gravel or stones. However, there is a growing interest in substituting alternative aggregate materials, largely as a potential use for recycled materials. While there is significant research on many different materials for aggregate substitutes (such as granulated coal ash, blast furnace slag or various solid wastes including fiberglass waste materials, granulated plastics, paper and wood products / wastes, sintered sludge pellets and others), the only two that have been significantly applied are glass cullet and crushed recycled concrete itself. Even though aggregate typically accounts for 70% to 80% of the concrete volume, it is commonly thought of as inert filler having little effect on the finished concrete properties. However, research has shown that aggregate in fact plays a substantial role in determining workability, strength, dimensional stability, and durability of the concrete. Also, aggregates can have a significant effect on the cost of the concrete mixture. Certain aggregate parameters are known to be important for engineered-use concrete: hardness, strength, and durability. The aggregate must be clean, without absorbed chemicals, clay coatings, and other fine materials in concentrations that could alter the hydration and bond of the cement paste. It is important to note the difference between aggregate and cement, because some materials have found use both as a cementitious material and as aggregate (such as certain blast furnace slags). Materials that have been researched or applied only as cement substitutes are addressed in another Technology Inventory article Cement Substitutes. Aggregate composed of recycled concrete generally has a lower specific gravity and a higher absorption than conventional gravel aggregate. New concrete made with recycled concrete aggregate typically has good workability, durability and resistance to saturated freeze-thaw action. The compressive strength varies with the compressive strength of the original concrete and the water-cement ratio of the new concrete. It has been found that concrete made with recycled concrete aggregate has at least two-thirds the compressive strength and modulus of elasticity of natural aggregate concrete. Field-testing has shown that crushed and screened waste glass may be used as a sand substitute in concrete. Nearly all waste glass can be used in concrete applications, including glass that is unsuitable for uses such as glass bottle recycling. Some of the specific glass waste materials that have found use as fine aggregate are non-recyclable clear window glass and fluorescent bulbs with very small amounts of contaminants. Possible applications for such waste-glass concrete are bike paths, footpaths, gutters and similar non-structural work. Lack of widespread reliable data on aggregate substitutes can hinder its use. To design consistent, durable recycled aggregate concrete, more testing is required to account for variations in the aggregate properties. Also, recycled aggregate generally has a higher absorption and a lower specific gravity than conventional aggregate. Research has revealed that the 7-day and 28-day compressive strengths of recycled aggregate concrete are generally lower than values for conventional concrete. Moreover, recycled aggregates may be contaminated with residual quantities of sulfate from contact with sulfate rich soil and chloride ions from marine exposure. Glass aggregate in concrete can be problematic due to the alkali silica reaction between the cement paste and the glass aggregate, which over time can lead to weakened concrete and decreased long-term durability. Research has been done on types of glass and other additives to stop or decrease the alkali silica reaction and thereby maintain finished concrete strength. However, further research is still needed before glass cullet can be used in structural concrete applications. The applications of recycled aggregate in highway construction as a road base material are very board and have been in use for almost 100 years. There has been much research based on the use of recycled aggregate that has been carried out all around the world. The research on recycled aggregate that has been carried out indicated that the successful application of crushed aggregate in concrete can be achieved. This successful research has been achieved in many countries, in particular in Europe; United States; Japan and China. This chapter presents literature reviews on the effects of various factors on the recycled aggregate from research from those countries. The major objective of most of the experiments or research on recycled aggregate is to find out the results in the strength characteristic area and what is the best method to achieve high strength concrete with recycled aggregate. Strengths of Recycled Aggregate Concrete Made Using Field- Demolished Concrete as Aggregate Tavakoli M. (1996) studied the compressive; splitting tensile and flexural strengths of 100% recycled coarse aggregate concrete and 100% natural sand to compare them with normal concrete made of natural crushed stone. The water-cement ratio was 0.3 and 0.4 in the concrete mix design. The test result shows the compressive, tensile and flexural strengths of RCA are little higher than the natural aggregate at the same size of 25.4mm at 28-day specimen. This indicates that if the compressive strength of the original concrete that is being recycled is higher than that of the control concrete, then the recycled aggregate concrete can also be made to achieve higher compressive strength than the control concrete. The results also indicates increase L.A. abrasion loss and water absorption capacity of recycled aggregates, which partly reflect the increased amount of water, adhering to the original stone aggregate, generally lead to reduced compressive strength of recycled aggregate concrete. Dhir et al. (1998) studied the effect of the cleanliness and percentage of the replacement of RCA. They found out that the degree of cleanliness of aggregate has significantly affected on the results of the properties of both the plastic and hardened concrete. The workability and compressive strengths both were lower than the quarried aggregate from 17% to 78% depending on the percentage of replacement of RCA. The results also indicated recycled aggregate has very high air content. Limbachiya and Leelawat (2000) found that recycled concrete aggregate had 7 to 9% lower relative density and 2 times higher water absorption than natural aggregate. According to their test results, it shown that there was no effect with the replacement of 30% coarse recycled concrete aggregate used on the ceiling strength of concrete. It also mentioned that recycled concrete aggregate could be used in high strength concrete mixes with the recycled concrete aggregate content in the concrete. Sagoe, Brown and Taylor (2002) stated that the difference between the characteristic of fresh and hardened recycled aggregate concrete and natural aggregate concrete is relatively narrower than reported for laboratory crush recycled aggregate concrete mixes. There was no difference at the 5% significance level in concrete compressive and tensile strength of recycled concrete and control normal concrete made from natural aggregate. Limbachiya (2003) found that there is no effect by using up to 30% of coarse recycled concrete aggregate on the standard 100mm concrete cube compressive strength. But when the percentage of recycled concrete aggregate used increased, the compressive strength was reducing. Behavior of Construction and Demolition Debris in Base and Subbase Application Pappjr et al (1998) studied using recycled aggregates in Base and Subbase applications. They found that recycled concrete yielded higher resilient modulus than the dense graded aggregate currently used. Furthermore, the results have been shown that recycled concrete have less permanent deformation than dense graded aggregate. They concluded that recycled concrete could be a valuable alternative to natural materials for base and subbase applications. Influence of recycled aggregate quality on concrete properties Sanchez de Juan et al. (2000) studied what is the maximum percentage, from 20% to 100%, replacement of recycled aggregate in concrete. The results showed that the compressive strength of recycled concrete is lower than that of a control concrete with equal water/cement ratio and same cement content. Recycled concretes with a percentage of recycled coarse aggregate lower than 50% show decreases in the range 5-10%, while for concretes with 100% recycled aggregates, decreases ranged from 10-15%. Experimental results also indicated that properties of conventional concretes and recycled concretes with same compressive strength when less than 20% of recycled coarse aggregate are used. The exception being modulus of elasticity was decreased until 10% can be found in recycled concretes. When the percentage of recycled aggregate is lower than 50%, tensile strength and drying shrinkage of recycled concrete is similar to conventional concrete with same compressive strength. As a result of the testing, all properties of concrete with a 100% of recycled coarse aggregate are affected. Some studies on durability of recycled aggregate concrete Mandal et al. (2002) studied the durability of recycled aggregate concrete and found that recycled aggregate had less durability than natural aggregate. However, when 10 percent replacement of cement by fly ash was used with recycled aggregate, the durability observed was increased. It significantly improved the compressive strength up to 46.5MPa, reduced shrinkage and increased durability to a level comparable to natural aggregate. Therefore, the results of this study provide a strong support for the feasibility of using recycled aggregate instead of natural aggregate for the production of concrete. Use of recycled aggregates in molded concrete bricks and Blocks Poon et al. (2002) developed a technique to produce concrete bricks and paving blocks from recycled aggregates. The test result showed that replacing natural aggregate by 25% to 50% had little effect on the compressive strength, but higher levels of replacement reduced the compressive strength. The transverse strength increased as the percentage of recycled aggregate increased. The concrete paving blocks with a 28-day compressive strength of at least 49MPa can be produced without the incorporation of fly ash by using up to 100% recycled aggregate. According to the study, recycled aggregate has been used in structural engineering. For example, a viaduct and marine loch in the Netherlands in 1998 and an office building in England in 1999. The project in the Netherlands had shown that 20 percent of the coarse aggregate was replaced by recycled aggregate. The project also indicated even there are some disadvantage of recycled aggregate such as being too weak, more porous and that it has a very higher value of water absorption. However, the study showed that these weaknesses could be avoided by using mechanized moulded concrete bricks. The workability also could be improved by poring the mix into the mould. Therefore, the performance of the bricks and blocks was also satisfactory in the shrinkage and skid resistance tests. Concrete with Recycled materials as Coarse Aggregates: Shrinkage and Creep Behavior Tawrwe et al. (1999) compared limestone aggregate with concrete rubble. They found the concrete rubble had a very high water absorption compared to the limestone aggregate (0.74% against 6.83% of dry mass). Furthermore the porous aggregate absorbed water slowly in some tests. For example, it was difficult to determine accurately the amount of water that had to be added to obtain suitable workability. The critical shrinkage of the limestone aggregate concrete was higher than the concrete rubble, but after a year the shrinkage was greater for the concrete rubble based aggregate. Treatments for the improvement of recycled aggregate Katz (2004) stated two methods to improve the quality of the recycled aggregates. The superplasticizer (1% weight of silica fume) was added to the solution of 10L of water and 1 kg raw silica fume to ensure proper ispersion of silica fume particles. After the silica fume impregnation, the SF treatment seems to improve significantly the compressive strength up to 51MPa at ranged from 23% to 33% at 7 days of the recycled aggregate concrete. Ultrasonic cleaning of the recycled aggregate to remove the loose particles and improve the bond between the new cement paste and the recycled aggregate, which, in turn, increased 7% of strength. Kantawong and Laksana (1998) mentioned that the fineness modulus and percentage of water absorption used instead with the recycled aggregate is higher than natural aggregate. The results of compressive strength of added reduce water admixture concrete is higher than the one that not added reduce water admixture concrete, ane the compressive strength of concrete produced that using recycled aggregate is higher than concrete using natural coarse aggregate. Sawamoto and Takehino (2000) found that the strength of the recycled aggregate concrete can be increased by using Pozzolanic material that can absorb the water. Mandal (2002) stated that adjusted the water/cement ratio when using recycled concrete aggregate during the concrete mixing can improved the strength of the recycled aggregate concrete specimens. From the obtained result, recycled aggregate concrete specimens had the same engineering and durability performance when compared to the concrete specimens made by natural aggregate within 28days design strength. Chen and Kuan (2003) found that the strength of the concrete specimens was affected by the unwashed recycled aggregate in the concrete. The effect will more strange at the low water cement ratio. These effects can be improved by using the washed recycled aggregate. Construction and Demolition Waste Recycling Reuse as Aggregate in Concrete Production Limbachiya (2004) studied the properties of recycled aggregate compared with natural aggregates and found out the density of RCA is typically 4-8% lower and water absorption 2-6 times higher. The results showed that a reduction in slump value with increasing RCA concrete mix. The results also slowed that up to 30% coarse RCA has no effect on the standard concrete cube strength but thereafter a gradual reduction with increasing RCA content occurs. This means that some adjustment is necessary of the water/cement ratio to achieve the equivalent strength with high proportions of RCA. Review on Recycled Process This section discusses the recycling process and method. Recycling Plant Recycling plant normally located in the suburbs of cities due to the noise pollution that make by t Natural Recycling of Aggregate Natural Recycling of Aggregate Introduction For many years peoples have been trying to keep the environmental clean and mention the natural balance of life. The scientific studies provide us the information and methods to achieve these objectives and the recycling of waste and by product materials represent the main role in these studies [1-4]. As a result of reconstruction of existing buildings and pavements, wars and natural disasters such as earthquakes the amount of construction and demolition materials are increasing every year. At the same time approval of additional facilities for waste disposal or treatment are become more difficult to obtain. Furthermore increasing restrictive environmental regulations have made waste disposal more difficult and expensive. Also the available natural aggregate in some countries decreases and may be become insufficient for the construction projects in these countries in the future [5]. So, the reuse of construction and demolition materials in construction has benefits not only in reducing the amount of materials requiring disposal but also can provide construction materials with significant saving of the original materials. According to the third Building Waste Monitoring Report [6], there is an increase in the recorded amount of building waste in the sectors of the building debris, road scarification and building site waste. It has arisen in Germany by 11.5 million tons, from 77.1 million tons in the period 1997/1998 to 88.6 million tons in the period 1999/2000. According to Rahlwes and Schmidt [7, 8], for concrete only, the annual crushed concrete quantity in west Germany only is about 30 million tones and in the European Union is approximately 130 million ton. Due to intensive building activities in the last decades, these amounts are expected to considerably increase after the year 2000. The properties of recycled coarse aggregate with a grain size above 4 mm and its reuse in concrete production and pavements construction have been evaluated and described in many. It has been estimated that approximately 50 million tons of concrete are currently demolished each year in the European Economic Communities [1], Equivalent figures are 60 million tons in the United States ([2], [3]), and in Japan [12] the total quantity of concrete debris available for recycling on some scale is about 10 to 12 million tons. Very little demolished concrete is currently recycled or reused anywhere in the world. The small quantity which is recovered is mainly reused as unstabilized base or subbase in highway construction. The rest is dumped or disposed of as fill. For Environmental and other reasons the number of readily accessible disposal sites around major cities in the world has decreased in recent years. Both disposals volume and maximum sizes of wastes have been restricted. In Japan disposal charges from USD 3 to 10 per ton are not uncommon. Moreover, distances between demolition sites and disposal areas have become larger and transportation costs higher. At the same time critical shortages of good natural aggregate is developing in many urban areas, and distances between deposits of natural material and sites of new construction have grown larger, and transportation costs have become correspondingly higher, It is estimated that between now and year 2,000, three times more demolished concrete will be generated each year than is today. For these reasons it can be foreseen that demolition contractors will come under considerable economic and other pressure to process demolished concrete for reuse as unscreened gravel, base and subbase materials, aggregates for production of new concrete or for other useful purposes. Large-scale recycling of demolished concrete will contribute not only to the solution of a growing waste disposal problem. It will also help to conserve natural resources of sand and gravel and to secure future supply of reasonably priced aggregates for building and road construction purposes within large urban areas of the world. Applications of Recycled Aggregate The recycled concrete aggregate shown in Figure 1.1 can be defined as crushed concrete composed of aggregate fragments coated with cement paste or cement mortar from the demolition of the old structures or pavements that has been processed to produce aggregates suitable for use in new concrete. The processing, as with many natural aggregates, generally involves crushing, grading and washing. This removes contaminant materials such as reinforcing steel, remnants of formwork, gypsum board, and other foreign materials. The resulting coarse aggregate is then suitable for use in concrete. The fine aggregate, however, generally contains a considerable amount of old cement paste and mortar. This tends to increase the drying shrinkage and creep properties of the new concrete, as well as leading to problems with unworkable mix and strength. Therefore, many transportation departments have found that using 100% coarse recycled aggregate but with only about 10% to 20% recycled fines works well. Regarding the results of most of the previous research that has been done so far, the application of Recycled Aggregate is mostly currently in low quality/strength concrete, for example, pavement base and slab rather than used in structural concrete. The most common application of Recycled Concrete Aggregate is the use in concrete sub-base in road construction, bank protection, noise barriers and embankments, many types of general bulk fills and fill materials for drainage structures. After the removal of contaminants through selective demolition, screening, and/or air separation and size reduction in a crusher to aggregate sizes, crushed concrete can be used as new concrete for pavements, shoulders, median barriers, sidewalks, curbs and gutters, and bridge foundations; structural grade concrete; soil-cement pavement bases; moulded concrete bricks and blocks; bituminous concrete etc. However, there is an example of recycled concrete being used for part of the structural slabs in a high-rise building in Japan but there was no too much detail available on this project. According to research that has been conducted in Australia, current use of recycled aggregates is still only around 7% of road construction material in South Australia. Victoria Road also use recycled aggregate for their road base construction projects in Victoria but MainRoads in Queensland does not currently. Traditionally, the application of recycled aggregate is used as landfill. Nowadays, the applications of recycled aggregate in construction areas are wide. The applications are different from country to country. Concrete Kerb and Gutter Mix Recycled aggregate have been used as concrete kerb and gutter mix in Australia. According to Building Innovation Construction Technology (1999), Stone says that the 10mm recycled aggregate and blended recycled sand are used for concrete kerb and gutter mix in the Lent hall Street project in Sydney. Granular Base Course Materials According to Market Development Study for Recycled Aggregate Products (2001), recycled aggregate are used as granular base course in the road construction. It also stated that recycled aggregate had proved that better than natural aggregate when used as granular base course in roads construction. They also found that when the road is built on the wet sub grade areas, recycled aggregate will stabilize the base and provide an improved working surface for pavement structure construction. Embankment Fill Materials Market Development Study for Recycled Aggregate Products (2001) stated that recycled aggregate can be used in embankment fill. The reason for being able to use in embankment fill is same as it is used in granular base course construction. The embankment site is on the wet sub grade areas. Recycled aggregate can stabilize the base and provide an improved working surface for the remaining works. Paving Blocks Recycled aggregate have been used as paving blocks in Hong Kong. According to Hong Kong Housing Department (n.d.), recycled aggregate are used as typical paving blocks. A trial project had been started to test the long – term performance of paving blocks made with recycled aggregate in 2002. Backfill Materials Recycled aggregate can be used as backfill materials. Mehus and Lillestol (n.d) found that Norwegian Building Research Institute (n.d) mentioned that recycled concrete aggregate can be used as backfill materials in the pipe zone along trenches after having testing in laboratory. Building Blocks Recycled aggregate used as building blocks. Mehus and Lillestol (n.d) stated that Optiroc AS had used recycled aggregate to produce the masonry sound insulation blocks. The masonry sound insulation blocks that produced had met all the requirements during the laboratory testing. International Status Mehus and Lillestol (n.d.) stated that RESIBA had constructed a new high school in Sorumsand, outside the city of Oslo, Norway in 2001. Recycled concrete aggregate had been used in this project. Thirty – five percent of coarse aggregate were replaced by recycled concrete aggregate in the foundations, half of the basement walls and columns. Several tests were conducted based on fresh and hardened concrete properties and the results shown that the concrete with thirty – five percent of recycled concrete aggregate have good freeze – thaw resistance. The use of recycled concrete aggregate did not shown any noticeable increase in cracking. According to Grubl, Nealen and Schmidt (n.d.), there is a building project, the â€Å"Waldspirale† by Friedensreich Hundertwasser, made from concrete with recycled aggregate in Darmstadf from November 1998 to September 1999. Numerous tests were evaluated for freshly missed and also hardened concrete properties. The result shown that the consistency controlled method for concrete with recycled aggregate is applicable. And it leads to concrete of equal quality when compared with concrete made from natural aggregate. According to Regain (1993/94), recycled aggregate were used as capping and sub-base layers in housing development at North Bracknell, UK in 1993/94. Visual inspections and condition surveys were carried out by using the falling weight deflectometer in 1998. The result shown that the sections with recycled aggregate did not show any difference in appearance compared to the sections that using natural aggregate. The tests gave the larger values of elastic modulus in the recycled aggregate sections. According to Regain (2001), footway paving slabs are being replaced gradually in London Borough of Bexley. Recycled aggregate are used as coarse aggregate in the concrete mix with a 12:1 aggregate to cement mix Advantages There are many advantages through using the recycled aggregate. The advantages that occur through usage of recycled aggregate are listed below. Environmental Gain The major advantage is based on the environmental gain. According to CSIRO (n.d.), construction and demolition waste makes up to around 40% of the total waste each year (estimate around 14 million tones) going to land fill. Through recycled these material, it can keep diminishing the resources of urban aggregated. Therefore, natural aggregate can be used in higher –grade applications. Save Energy The recycling process can be done on site. According to Kajima Technical Research Institute (2002), Kajima is developing a method of recycling crushed concrete that used in the construction, known as the Within-Site Recycling System. Everything can be done on the construction site through this system, from the process of recycled aggregate, manufacture and use them. This can save energy to transport the recycled materials to the recycling plants. Cost Secondly is based on the cost. The cost of recycled aggregate is cheaper than virgin aggregate. According to PATH Technology Inventory (n.d.), the costs of recycled concrete aggregate are sold around $3.50 to $7.00 per cubic yard. It depends on the aggregate size limitation and local availability. This is just around one and half of the cost for natural aggregate that used in the construction works. The transportation cost for the recycled aggregate is reduced due to the weight of recycled aggregate is lighter than virgin aggregate. Concrete Network (n.d) stated that recycling concrete from the demolition projects can saves the costs of transporting the concrete to the land fill (around $0.25 per ton/ mile), and the cost of disposal (around $100 per ton). Beside that, Aggregate Advisory Service (n.d.) also state that the recycling site may accept the segregates materials at lower cost than landfill without tax levy and recycled aggregate can be used at lower prices than primary aggregate in the construction works. Job Opportunities There will be many people involved in this new technology, such as specialized and skilled persons, general workers, drivers and etc. According to Scottish Executive (2004), a Scottish Market Development Program is developed. The purpose of this program is to recycle the materials that arising in Scotland. This program will provide 150 new jobs in the Scottish industry. Sustainability The amount of waste materials used for landfill will be reducing through usage of recycled aggregate. This will reduce the amount of quarrying. Therefore this will extend the lives of natural resources and also extend the lives of sites that using for landfill. Market is Wide The markets for recycled concrete aggregate are wide. According to Environmental Council of Concrete Organization (n.d), recycled concrete aggregate can be used for sidewalk, curbs, bridge substructures and superstructures, concrete shoulders, residential driveways, general and structural fill. It also mentioned that recycled concrete aggregate can be used in sub bases and support layers such as unstabilized base and permeable bases. Disadvantages Although there are many advantages by using recycled aggregate. But there are still some disadvantages in recycled aggregate. Hard to have permit Jacobsen (1999) stated that it is hard to get the permit for the machinery that needed air permit or permit to operate during the recycling process. These has to depend on the local or state regulations whether this technology is implemented or not. Lack of Specification and Guidelines According to Kawano (n.d), there is no specification or any guideline when using recycled concrete aggregate in the constructions. In many cases, the strength characteristic will not meet the requirement when using recycled concrete aggregate. Therefore, more testing should be considered when using recycled concrete aggregate. Water Pollution The recycled process will cause water pollution. Morris of National Ready Mix Concrete Association (n.d) had mentioned that the wash out water with the high pH is a serious environmental issue. According to Building Green (1993), the alkalinity level of wash water from the recycling plants is pH12. This water is toxic to the fish and other aquatic life. Project Aim The aim for this on – going project is to determine the strength characteristic of recycled aggregate for application in high strength structural concrete, which will give a better understanding on the properties of concrete with recycled aggregate, where can be an alternative material to coarse aggregate in structural concrete. Project Scope Review and research of recycled aggregate. Construct the concrete specimens by using different percentage of recycled aggregate. Investigation and laboratory testing on high strength concrete with recycled aggregate. Analysis the results and recommendation for further research area. Dissertation Overview This dissertation is structured in the following format. Chapter 2 provides a review of relevant literature, overview of recycling process, as well as comparison of recycled aggregate and natural aggregate. This chapter also discussed the previous investigation and testing done with recycled aggregate. Chapter 3 includes the preliminary design and information on the recycled  aggregate testing and design of the concrete mix. Chapter 4 describes the experimental methodology carried out in order to obtain the required data. Chapter 5 discusses the results and analysis of all experimental results obtained from the testing procedures. Chapter 6 contains the conclusions of the research and recommendations on further work. Literature review of Recycled Aggregate Literature review of Recycled Aggregate Conventional concrete aggregate consists of sand (fine aggregate) and various sizes and shapes of gravel or stones. However, there is a growing interest in substituting alternative aggregate materials, largely as a potential use for recycled materials. While there is significant research on many different materials for aggregate substitutes (such as granulated coal ash, blast furnace slag or various solid wastes including fiberglass waste materials, granulated plastics, paper and wood products / wastes, sintered sludge pellets and others), the only two that have been significantly applied are glass cullet and crushed recycled concrete itself. Even though aggregate typically accounts for 70% to 80% of the concrete volume, it is commonly thought of as inert filler having little effect on the finished concrete properties. However, research has shown that aggregate in fact plays a substantial role in determining workability, strength, dimensional stability, and durability of the concrete. Also, aggregates can have a significant effect on the cost of the concrete mixture. Certain aggregate parameters are known to be important for engineered-use concrete: hardness, strength, and durability. The aggregate must be clean, without absorbed chemicals, clay coatings, and other fine materials in concentrations that could alter the hydration and bond of the cement paste. It is important to note the difference between aggregate and cement, because some materials have found use both as a cementitious material and as aggregate (such as certain blast furnace slags). Materials that have been researched or applied only as cement substitutes are addressed in another Technology Inventory article Cement Substitutes. Aggregate composed of recycled concrete generally has a lower specific gravity and a higher absorption than conventional gravel aggregate. New concrete made with recycled concrete aggregate typically has good workability, durability and resistance to saturated freeze-thaw action. The compressive strength varies with the compressive strength of the original concrete and the water-cement ratio of the new concrete. It has been found that concrete made with recycled concrete aggregate has at least two-thirds the compressive strength and modulus of elasticity of natural aggregate concrete. Field-testing has shown that crushed and screened waste glass may be used as a sand substitute in concrete. Nearly all waste glass can be used in concrete applications, including glass that is unsuitable for uses such as glass bottle recycling. Some of the specific glass waste materials that have found use as fine aggregate are non-recyclable clear window glass and fluorescent bulbs with very small amounts of contaminants. Possible applications for such waste-glass concrete are bike paths, footpaths, gutters and similar non-structural work. Lack of widespread reliable data on aggregate substitutes can hinder its use. To design consistent, durable recycled aggregate concrete, more testing is required to account for variations in the aggregate properties. Also, recycled aggregate generally has a higher absorption and a lower specific gravity than conventional aggregate. Research has revealed that the 7-day and 28-day compressive strengths of recycled aggregate concrete are generally lower than values for conventional concrete. Moreover, recycled aggregates may be contaminated with residual quantities of sulfate from contact with sulfate rich soil and chloride ions from marine exposure. Glass aggregate in concrete can be problematic due to the alkali silica reaction between the cement paste and the glass aggregate, which over time can lead to weakened concrete and decreased long-term durability. Research has been done on types of glass and other additives to stop or decrease the alkali silica reaction and thereby maintain finished concrete strength. However, further research is still needed before glass cullet can be used in structural concrete applications. The applications of recycled aggregate in highway construction as a road base material are very board and have been in use for almost 100 years. There has been much research based on the use of recycled aggregate that has been carried out all around the world. The research on recycled aggregate that has been carried out indicated that the successful application of crushed aggregate in concrete can be achieved. This successful research has been achieved in many countries, in particular in Europe; United States; Japan and China. This chapter presents literature reviews on the effects of various factors on the recycled aggregate from research from those countries. The major objective of most of the experiments or research on recycled aggregate is to find out the results in the strength characteristic area and what is the best method to achieve high strength concrete with recycled aggregate. Strengths of Recycled Aggregate Concrete Made Using Field- Demolished Concrete as Aggregate Tavakoli M. (1996) studied the compressive; splitting tensile and flexural strengths of 100% recycled coarse aggregate concrete and 100% natural sand to compare them with normal concrete made of natural crushed stone. The water-cement ratio was 0.3 and 0.4 in the concrete mix design. The test result shows the compressive, tensile and flexural strengths of RCA are little higher than the natural aggregate at the same size of 25.4mm at 28-day specimen. This indicates that if the compressive strength of the original concrete that is being recycled is higher than that of the control concrete, then the recycled aggregate concrete can also be made to achieve higher compressive strength than the control concrete. The results also indicates increase L.A. abrasion loss and water absorption capacity of recycled aggregates, which partly reflect the increased amount of water, adhering to the original stone aggregate, generally lead to reduced compressive strength of recycled aggregate concrete. Dhir et al. (1998) studied the effect of the cleanliness and percentage of the replacement of RCA. They found out that the degree of cleanliness of aggregate has significantly affected on the results of the properties of both the plastic and hardened concrete. The workability and compressive strengths both were lower than the quarried aggregate from 17% to 78% depending on the percentage of replacement of RCA. The results also indicated recycled aggregate has very high air content. Limbachiya and Leelawat (2000) found that recycled concrete aggregate had 7 to 9% lower relative density and 2 times higher water absorption than natural aggregate. According to their test results, it shown that there was no effect with the replacement of 30% coarse recycled concrete aggregate used on the ceiling strength of concrete. It also mentioned that recycled concrete aggregate could be used in high strength concrete mixes with the recycled concrete aggregate content in the concrete. Sagoe, Brown and Taylor (2002) stated that the difference between the characteristic of fresh and hardened recycled aggregate concrete and natural aggregate concrete is relatively narrower than reported for laboratory crush recycled aggregate concrete mixes. There was no difference at the 5% significance level in concrete compressive and tensile strength of recycled concrete and control normal concrete made from natural aggregate. Limbachiya (2003) found that there is no effect by using up to 30% of coarse recycled concrete aggregate on the standard 100mm concrete cube compressive strength. But when the percentage of recycled concrete aggregate used increased, the compressive strength was reducing. Behavior of Construction and Demolition Debris in Base and Subbase Application Pappjr et al (1998) studied using recycled aggregates in Base and Subbase applications. They found that recycled concrete yielded higher resilient modulus than the dense graded aggregate currently used. Furthermore, the results have been shown that recycled concrete have less permanent deformation than dense graded aggregate. They concluded that recycled concrete could be a valuable alternative to natural materials for base and subbase applications. Influence of recycled aggregate quality on concrete properties Sanchez de Juan et al. (2000) studied what is the maximum percentage, from 20% to 100%, replacement of recycled aggregate in concrete. The results showed that the compressive strength of recycled concrete is lower than that of a control concrete with equal water/cement ratio and same cement content. Recycled concretes with a percentage of recycled coarse aggregate lower than 50% show decreases in the range 5-10%, while for concretes with 100% recycled aggregates, decreases ranged from 10-15%. Experimental results also indicated that properties of conventional concretes and recycled concretes with same compressive strength when less than 20% of recycled coarse aggregate are used. The exception being modulus of elasticity was decreased until 10% can be found in recycled concretes. When the percentage of recycled aggregate is lower than 50%, tensile strength and drying shrinkage of recycled concrete is similar to conventional concrete with same compressive strength. As a result of the testing, all properties of concrete with a 100% of recycled coarse aggregate are affected. Some studies on durability of recycled aggregate concrete Mandal et al. (2002) studied the durability of recycled aggregate concrete and found that recycled aggregate had less durability than natural aggregate. However, when 10 percent replacement of cement by fly ash was used with recycled aggregate, the durability observed was increased. It significantly improved the compressive strength up to 46.5MPa, reduced shrinkage and increased durability to a level comparable to natural aggregate. Therefore, the results of this study provide a strong support for the feasibility of using recycled aggregate instead of natural aggregate for the production of concrete. Use of recycled aggregates in molded concrete bricks and Blocks Poon et al. (2002) developed a technique to produce concrete bricks and paving blocks from recycled aggregates. The test result showed that replacing natural aggregate by 25% to 50% had little effect on the compressive strength, but higher levels of replacement reduced the compressive strength. The transverse strength increased as the percentage of recycled aggregate increased. The concrete paving blocks with a 28-day compressive strength of at least 49MPa can be produced without the incorporation of fly ash by using up to 100% recycled aggregate. According to the study, recycled aggregate has been used in structural engineering. For example, a viaduct and marine loch in the Netherlands in 1998 and an office building in England in 1999. The project in the Netherlands had shown that 20 percent of the coarse aggregate was replaced by recycled aggregate. The project also indicated even there are some disadvantage of recycled aggregate such as being too weak, more porous and that it has a very higher value of water absorption. However, the study showed that these weaknesses could be avoided by using mechanized moulded concrete bricks. The workability also could be improved by poring the mix into the mould. Therefore, the performance of the bricks and blocks was also satisfactory in the shrinkage and skid resistance tests. Concrete with Recycled materials as Coarse Aggregates: Shrinkage and Creep Behavior Tawrwe et al. (1999) compared limestone aggregate with concrete rubble. They found the concrete rubble had a very high water absorption compared to the limestone aggregate (0.74% against 6.83% of dry mass). Furthermore the porous aggregate absorbed water slowly in some tests. For example, it was difficult to determine accurately the amount of water that had to be added to obtain suitable workability. The critical shrinkage of the limestone aggregate concrete was higher than the concrete rubble, but after a year the shrinkage was greater for the concrete rubble based aggregate. Treatments for the improvement of recycled aggregate Katz (2004) stated two methods to improve the quality of the recycled aggregates. The superplasticizer (1% weight of silica fume) was added to the solution of 10L of water and 1 kg raw silica fume to ensure proper ispersion of silica fume particles. After the silica fume impregnation, the SF treatment seems to improve significantly the compressive strength up to 51MPa at ranged from 23% to 33% at 7 days of the recycled aggregate concrete. Ultrasonic cleaning of the recycled aggregate to remove the loose particles and improve the bond between the new cement paste and the recycled aggregate, which, in turn, increased 7% of strength. Kantawong and Laksana (1998) mentioned that the fineness modulus and percentage of water absorption used instead with the recycled aggregate is higher than natural aggregate. The results of compressive strength of added reduce water admixture concrete is higher than the one that not added reduce water admixture concrete, ane the compressive strength of concrete produced that using recycled aggregate is higher than concrete using natural coarse aggregate. Sawamoto and Takehino (2000) found that the strength of the recycled aggregate concrete can be increased by using Pozzolanic material that can absorb the water. Mandal (2002) stated that adjusted the water/cement ratio when using recycled concrete aggregate during the concrete mixing can improved the strength of the recycled aggregate concrete specimens. From the obtained result, recycled aggregate concrete specimens had the same engineering and durability performance when compared to the concrete specimens made by natural aggregate within 28days design strength. Chen and Kuan (2003) found that the strength of the concrete specimens was affected by the unwashed recycled aggregate in the concrete. The effect will more strange at the low water cement ratio. These effects can be improved by using the washed recycled aggregate. Construction and Demolition Waste Recycling Reuse as Aggregate in Concrete Production Limbachiya (2004) studied the properties of recycled aggregate compared with natural aggregates and found out the density of RCA is typically 4-8% lower and water absorption 2-6 times higher. The results showed that a reduction in slump value with increasing RCA concrete mix. The results also slowed that up to 30% coarse RCA has no effect on the standard concrete cube strength but thereafter a gradual reduction with increasing RCA content occurs. This means that some adjustment is necessary of the water/cement ratio to achieve the equivalent strength with high proportions of RCA. Review on Recycled Process This section discusses the recycling process and method. Recycling Plant Recycling plant normally located in the suburbs of cities due to the noise pollution that make by t