Limestone Calcite CaCO3 90% Dolomite CaMg(CO3)2 5% Quartz SiO2 5% Clinker Alite C3S 58% Belite C2S 23% Aluminate C3A 9% Ferrite C4AF 7% Periclase MgO 1% Arcanite K2SO4 1% Free lime CaO 1%