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Q: Gypsum is one of the constituents of cement which is added to the cement during its manufacturing. What is the purpose of adding gypsum?
  • A. colour
  • B. delaying the setting time
  • C. strength
  • D. reducing the setting time
Correct Answer: Option B - Gypsum is calcium sulphate dihydrate (CaSO₄.2H₂O) and a mineral used in cement manufacturing. The purpose of adding gypsum in cement is delaying the setting time of cement. It helps in controlling the rate of hardening of cement.
B. Gypsum is calcium sulphate dihydrate (CaSO₄.2H₂O) and a mineral used in cement manufacturing. The purpose of adding gypsum in cement is delaying the setting time of cement. It helps in controlling the rate of hardening of cement.

Explanations:

Gypsum is calcium sulphate dihydrate (CaSO₄.2H₂O) and a mineral used in cement manufacturing. The purpose of adding gypsum in cement is delaying the setting time of cement. It helps in controlling the rate of hardening of cement.