It is necessary to add gypsum in the final stages of preparation of ce

1.	It is necessary to add gypsum in the final stages of preparation of cement . Explain why ?
Answer» Solution :Gypsum `(CaSO_(4). 2H_(2)O)` is added in the FINAL stages of preparation of cement since when `H_(2)O` is added to cement it slows down the process of setting of cement so that it GETS sufficiently hardened thereby imparting greater strength toit .

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