Q.

Purpose of adding gypsum during the manufacture of cement is

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By Expert Faculty of Sri Chaitanya

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.

(Detailed Solution Below)

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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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