Super-sulphate cement

This cement is made by grinding a mixture of well granulated blast furnance slag ( 80 to 85 percent ) calcium sulphate  (10 to 15 percent ) and ordinary cement ( 1 to 2 percentg ) . This cement is ground finer than the Portland cement .  One of the significant properties of this cement is its low total heat of hydration . It is therefore very useful for mass concrete works . This cement is highly restaint to chemical attack . Concrete made from this type of cement expands if curing is done under water and shrinks if curing is done in air .