Question

Long term elastic modulus in terms of creep coefficient $\left(\theta \right)$ and 28-days characteristic strength $\left(f_{ck}\right)$ is given by

• A. $\frac{5000\sqrt{f_{ck}}}{1+\theta }MPa$
• B. $\frac{50000\sqrt{f_{ck}}}{1+\theta }MPa$
• C. $\frac{5000f_{ck}}{1+\sqrt{\theta }}MPa$
• D. $\frac{5000\sqrt{f_{ck}}}{\sqrt{1+\theta }}MPa$

Answer 1

The correct option is A $\frac{5000\sqrt{f_{ck}}}{1+\theta }MPa$

Long term modulus of elasticity
$=\frac{E_c}{1+\theta }=\frac{5000\sqrt{f_{ck}}}{(1+\theta )}MPa$