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Cement Wikipedia The Free Encyclopedia

simple english wikipedia, the free encyclopedia,concrete. concrete is an important material for making different buildings and structures. it is a composite made of portland cement, sand, gravel or aggregate, and water in varying proportions depending on the task. hadrian 's pantheon in rome is an example of roman concrete construction. outer view of the roman pantheon, still the largest (43.wikipedia, the free encyclopedia,cement kiln - wikipedia, the free encyclopedia - free download as pdf file (.pdf), text file (.txt) or read online for free..

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