One of the main ingredients of cement.
Natural Gypsum is a sulfate mineral compound of Calcium Sulfate Dihydrate. It has a wide variety of uses. Probably the major consumers of Gypsum at present is the Cement Industry.
By weight about 4% to 6% Gypsum in crushed condition is utilized in Portland Cement Manufacture after mixing with Cement/Clinker Gypsum acts as a retarder and controls the setting time of cement.