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Question
How much water is added in cement mortar to determine compressive strength of cement?
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A.
B.
0.4 times the mass of cement 
C.
Equal to 0.85 P percent of total mass of cement and sand, where P is water required for standard consistency.
D.
0.28 times the mass of cement mortar
Answer ( Option A)

Solution

Consistency: Vicat's Apparatus is used to find out the consistency, initial setting time and final setting time of the cement. In the normal consistency test we have to find out the amount of water to be added to the cement to form a cement paste of normal consistency
            Type of test

Water to be added

(Consistency)

Setting time (both initial and final)

0.85P

Compressive strength test

(P/4 + 3)%

Soundness test

0.78P

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