Question

What is the ratio of flexural strength $\left(f_{cr}\right)$ to the characteristic compressive strength of concrete $\left(f_{ck}\right)$ for M25 grade concrete?

• A. 0.08
• B. 0.11
• C. 0.14
• D. 0.17

Answer 1

The correct option is C 0.14

$f_{cr}=0.7\sqrt{f_{ck}}$

$\therefore \frac{f_{cr}}{f_{ck}}=\frac{0.7\sqrt{25}}{25}=0.14$