Disintegration of bricks masonry walls is primarily due to&n

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Civil Engineering

5

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Disintegration of bricks masonry walls is primarily due to
1) Efflorescence
2) Magnesium sulphate in bricks
3) Calcined clay admixtures
4) Kankar nodules
Which of the a above statements are correct?

[ESE (IES) CE 2016 P1]

A 1, 2 and 3 only

B 1, 2 and 4 only

C 3 and 4 only

D 1, 2, 3 and 4