Question

To control corrosion, concrete with _________ is used.

(a) Low permeability

(b) Low thermal coefficient

(c) More cement content

(d) More coarse aggregates

I have been asked this question at a job interview.

I would like to ask this question from Building Maintenance in chapter Building Construction of Basic Civil Engineering

Answer 1

The correct choice is (a) Low permeability

To explain: If the concrete is less permeable, then there is less chance of moisture, chemical absorption which leads to corrosion of steel bars.