31. Which substance is used to retard the setting action of cement? A.CaO B.Al2O3 C.CaSO4.2H2O D.Na2O + K2O

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Abhishek Mishra

2 years ago

Answer: Option C Solution: CaSO4.2H2O (Gypsum) is added to cement clinker to retard setting action of cement.

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