Question

The only drawback of lightweight concrete is that the ___________

(a) Depth of carbonation

(b) Heavy absorption

(c) Desalination

(d) Oxidation

The question was asked in class test.

This question is from Different Types of Concrete in chapter Cement Concrete Construction of Construction & Building Materials

Answer 1

The correct answer is (a) Depth of carbonation

To explain I would say: The depth within which collision can occur under suitable conditions, is nearly twice than that of normal concrete. Hence special care will have to be taken to provide sufficient cover to the reinforcement of lightweight structure to grant protection against corrosion.