Q.
Purpose of adding gypsum during the manufacture of cement is
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a
To Increase the crystalline nature of cement
b
To increase the rate of setting
c
To decrease the time of setting
d
To decrease the rate of setting
answer is D.
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Detailed Solution
Setting of cement must be carried out slowly. 2-3 % gypsum added to cement slows down the process of setting so that cement sets into a stable hard mass.
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