Question

How many types of sulphates attack occur in concrete?

(a) 1

(b) 2

(c) 3

(d) 4

I had been asked this question in unit test.

I would like to ask this question from Mass Concrete and Chemical Action in chapter Durability of Concrete of Concrete Technology

Answer 1

The correct option is (b) 2

Explanation: There are two types of sulphates attack in concrete and mortar i.e., internal attack and external attack.