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Q: To retard the initial setting time of cement, the compound responsible is ..........
  • A. Tri-Calcium silicate
  • B. Gypsum
  • C. Di-calcium silicate
  • D. Tri calcium aluminate
Correct Answer: Option B - The Gypsum is used in a cement. It is incresed the initial setting time of the cement. Propotions – 2 to 3% Gypsum is a retarder material.
B. The Gypsum is used in a cement. It is incresed the initial setting time of the cement. Propotions – 2 to 3% Gypsum is a retarder material.

Explanations:

The Gypsum is used in a cement. It is incresed the initial setting time of the cement. Propotions – 2 to 3% Gypsum is a retarder material.