Building Materials
Assertion A : Pure lime takes a long time to develop adequate strength.Reason R : Pure lime has slow hardening characteristics.Select your answer according to the coding system given below:

A is true but R is false
A is false but R is true
Both A and R is true and R is not a correct explanation of A
Both A and R is true and R is correct explanation of A

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Building Materials
Rapid hardening cement attains early strength due to

Larger proportion of lime grounded finer than normal cement
Lesser proportion of lime grounded coarser than normal cement
Lesser proportion of lime grounded finer than normal cement
Excess percentage of gypsum

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