Major elements in inorganic cementitious materials

Inorganic cementitious materials always rely on alkaline and alkaline earth metals, no matter it is a hydraluic or air-hardening material, The chemical compounds employed in the cementitious products usually were picked up from one of more of CaO, SiO2, Al2O3, MgO, Na2O and CaSO4, but the oxides Ca, Mg, Na play a key role in the materials.