Aluminate cement is a hydraulic cementitious material made from bauxite and limestone through calcination, resulting in clinker with calcium aluminate as the main component and an alumina content of approximately 50%, which is then ground. Aluminate cement is typically yellow or brown, but can also be gray. The main minerals in aluminate cement are monocalcium aluminate (CaO·Al₂O₃, abbreviated CA) and other aluminates, as well as small amounts of dicalcium silicate (2CaO·SiO₂