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The main reason for cracks in masonry joints is:

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in Basic Civil Engineering by (111k points)
The main reason for cracks in masonry joints is:

(a) Moisture

(b) Sulphate

(c) Magnesium

(d) Sodium

This question was addressed to me in an interview for internship.

This key question is from Building Maintenance topic in division Building Construction of Basic Civil Engineering

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Right answer is (b) Sulphate

The explanation: Sulphate content of bricks to be used in masonry should be checked. These attack the mortar and weakens it, leading to development of cracks. They appear after 2-3 years of construction.

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