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PERCENTAGE COMPOSITION OF CEMENT (OPC)

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Function of Cement is first to bind the sand and course aggregate together, to fill the voids between sand and course aggregate.

Oxide composition of Cement (OPC) is


Oxide Composition of Cement



Lime (CaO) : 60% to 65%


Silica (SiO2) : 17% to 25%

Alumina (Al2O) : 33% to 8%


Ferrous Oxide (Fe2O3) : 0.5% to 6%


Magnesia (MgO) : 0.5% to 4%


Sulphur Trioxide (SO3) : 1% to 2%


Alkali+Potash(Na2O + K2O) : 0.5% to 1.3



Major Component of Cement=Lime=63%

Minor Component of Cement=Alkali=1%


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