Design of Masonry Structures
Assertion A : For identical strength, a composite cement-lime mortar is preferred over cement mortar.Reason R : Composite cement-lime mortar has higher drying shrinkage than cement mortar.Select your answer based on the codes given below. Codes:

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

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Design of Masonry Structures
Consider the following statements:
1. Masonry in rich cement mortar though having good strength with high shrinkage is much liable for surface cracks.
2. Lime mortar possesses poor workability and poor water retentivity and also suffers high shrinkage.
3. Masonry in lime mortar has better resistance against rain penetration and is less liable to crack when compared to masonry in cement mortar.
Which of these statements are correct?

1 and 2
1 and 3
2 and 3
1, 2 and 3

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