What is chemical composition of portland cement?
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Composition :Portland cement consists essentially of compounds of lime( calcium oxide, Cao) mixed with silica(silicon dioxide, Sio2) and alumina(aluminum oxide, Al2O3). The lime is obtain from a calcareous (lime containing) raw material, and the other oxide are from an argillaceous(clayey) material.
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Explanation:
Portland cement where inside the house is kept
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