Looking at the five-thousand-year history of mankind,humans developed a series of technology of building environment,i.e.civil engineering. If we say the development of civil engineering is an epitome of the glorious civilisation,the discovery and enhance of material proclaim the developing civil engineering.People have found many sorts of traditional materials (soil,timber,masonry) and modern materials (concrete,glass,fibre,polymer).Among these,concrete as composite material played the greatest role in engineering over the last two hundred years.
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