Green_Concrete - Concrete and the Environment oncrete and...

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Unformatted text preview: Concrete and the Environment oncrete and The Environment P.K. Mehta and P.J.M. Monteiro, Concrete: Microstructure, Properties, and Materials Concrete and the Environment here is increasing concern now that the choice of construction aterials must also be governed by ecological considerations oncrete and The Environment P.K. Mehta and P.J.M. Monteiro, Concrete: Microstructure, Properties, and Materials Population Growth At the beginning of the 20 th Century, the world population was 1.5 billion; by the end of the 20 th Century it had risen to 6 billion. Considering that it took 10,000 years after of the last ice age for the population to rise to the 1.5 billion mark, the rate of growth from 1.5 to 6 billion people oncrete and The Environment P.K. Mehta and P.J.M. Monteiro, Concrete: Microstructure, Properties, and Materials Urbanization At the beginning of the 20 th Century, approximately ten percent of the people lived in cities; in the year 2001 nearly three of the six billion inhabitants live in and around the cities. oncrete and The Environment P.K. Mehta and P.J.M. Monteiro, Concrete: Microstructure, Properties, and Materials Technology Choices Unfortunately, our technology choices have turned out to be wasteful because decisions are based on short term and narrow goals of the enterprise rather than a holistic view of the full range of consequences from the use of a technology. oncrete and The Environment P.K. Mehta and P.J.M. Monteiro, Concrete: Microstructure, Properties, and Materials Waste Only 6% of the total global flow of materials, some 500 billion tons a year, actually ends up in consumer products whereas much of the virgin materials are being returned to the environment in the form of harmful solid, liquid, and gaseous wastes oncrete and The Environment P.K. Mehta and P.J.M. Monteiro, Concrete: Microstructure, Properties, and Materials Environmental Impact of Technology Choices The greatest environmental challenge today is that of the human-made climate change due to global warming caused by steadily rising concentration of green-house gases in the earth's atmosphere during the past 100 years oncrete and The Environment P.K. Mehta and P.J.M. Monteiro, Concrete: Microstructure, P....
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Green_Concrete - Concrete and the Environment oncrete and...

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