(A) gypsum ()
(B) calcium chloride (X)
(C) calcium carbonate (X)
(D) none of the above (X)
Answers: The most commonly used retarder in cement is gypsum.
(A) gypsum ()
(B) calcium chloride (X)
(C) calcium carbonate (X)
(D) none of the above (X)
Answers: The most commonly used retarder in cement is gypsum.
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