1.

Cement is essentially a finely powdered mixture of calcium silicates and aluminates along with small quantities of gypsum which sets into a hard stone-like mass when treated with water. Which of the following important ingredients present in Portland cement contributes to the maximum extent?A. Dicalcium silicateB. Tricalcium silcateC. Tricalcium aluminateD. Both (1) and (2)

Answer» Correct Answer - B
Dicalcium silicate `(Ca_(2)SiO_(4))` is 26% trricalcium silicate `(Ca_(3)SiO_(5))` is 51% ad tricalcium aluminate `(Ca_(3)Al_(2)O_(6))` is 11%


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