Friday, August 16, 2013

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Composition of Portland cement

The basic components of cement are:

SiO₂	17-25 %
Al₂O₃	4-8%
Fe₂O₃	0.5-0.6 %
CaO	61-63 %
MgO	0.1-4.0 %
SO₃	1.3-3.0 %
Na₂ + K₂O	0.4-1.3 %
Cl	0.01-0.1%
IR	0.6-1.75 %

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