Gypsum is a mineral and is hydrated calcium sulphate in chemical form Gypsum plays a very important role in controlling the rate of hardening of the cement so its is generally termed as retarding agent of cement It is mainly used for regulating the setting time of cement and is an indispensable component
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During setting and hardening of cement some amount of heat is liberated due to hydration and hydrolysis reactions The quantity of heat evolved during Complete hydration of cement is 500 KJKg Function of gypsum in cement Tri calcium aluminate C3A combines with water very rapidly
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Gypsum is a mineral and is hydrated calcium sulfate in chemical form Gypsum plays a very important role in controlling the rate of hardening of the cement During the cement manufacturing process upon the cooling of clinker a small amount of gypsum is introduced during the final grinding process
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