Gypsum Just another WordPress site Mineral IRAN
Although gypsum of 75% to 85% purity is used in the manufacture of cement, yet a minimum of 82% CaSO 2 O is preferred. Nearly to tonne of gypsum is required per tonne of cement produced. It is mixed with the clinker in the end and then crushed to form cement. It acts as retarder in quick setting of cement.