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Table 1 Chemical composition of cement

From: Study the effect of partially replacement sand by waste pistachio shells in cement mortar

Compound composition Chemical composition Percentage by weight Limits of IQS 5:1984
Lime CaO 60.77 _
Silica SiO2 19.35 _
Alumina Al2O3 5.2 _
Iron oxide Fe2O3 3.6 _
Magnesia MgO 2.95 < 5
Sulfate SO3 2.5 < 2.8
Loss on ignition L.O.I 1.15 < 4
Insoluble residue I.R 0.2 < 1.5
Lime saturation factor L.S.F 0.5 0.66–1.02
Main compounds (Bogue’s equation) percentage by weight of cement
Tricalcium silicate (C3S) 53.0569
Dicalcium silicate (C2S) 15.5296
Tricalcium aluminate (C3A) 7.696
Tetraclcium aluminoferrite (C4AF) 10.944