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Chemical Composition of Cement

Deficiency of...

Question

Deficiency of which of the following oxide causes reduction in setting time of cement :

A

C a O

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B

A l_{2} O_{3}

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C

F e_{2} O_{3}

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D

M g O

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Solution

The correct option is A $C a O$
CaO (lime) i.e., calcium oxide which is present in large (62-67%) form when decrease results decrease in setting-time of cement. When in excess Unsoundness- Increase or decrease in volume.

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