High Alumina Cement (HAC) is also known as calcium aluminate cement (CAC) or aluminous cement, is composed of calcium aluminates. High Alumina Cement was first manufactured by Lafarge, the cement producer, and became available in the UK in 1925.

It has good resistance to be resistant to chemical attacks which are required in marine construction work. It is able to gain high early strength which allows faster construction work. High alumina cement mostly used to manufacture structural concrete such as pre-cast beams.

High Alumina Cement Manufacturing (IS 6452 : 1989):

High alumina cement is manufactured by sintering or fusing a mixture in suitable proportions, of alumina and calcareous materials and grinding the resultant product to a fine powder. There are two main elements used to make high alumina cement are limestone and bauxite. These two ingredients were charged into the furnace.