Question

In design of R.C.C. structures, the tensile strength of concrete is taken as:

(a) 5N/mm^2

(b) 2N/mm^2

(c) 0.3N/mm^2

(d) 0N/mm^2

I have been asked this question in unit test.

Enquiry is from Properties of Concrete in chapter Building Construction of Basic Civil Engineering

Answer 1

Right answer is (d) 0N/mm^2

The best explanation: Since concrete does not take up tensile loads, it is taken as zero. But IS 456-2000 recommends the tensile strength to be calculated using Ft = 0.7√fck  N/mm^2.