1.

In portland cement what enhances the settling time?(a) CaSO4, 1/2 2H2O(b) CaSO4, 2H2O(c) CaCO3(d) CaSO4

Answer»

(b) CaSO4, 2H2O

Gypsum (CaSO4, 2H2O) is usually added to prevent early hardening and increase the settling time



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