Consider the following statements concerning elasticity of concrete
1. Stress-strain behaviour of concrete is a straight line up to 10% of ultimate stress.
2. Strain determination is obtained from tangent modulus.
3. Modulus of elasticity, of concrete is also called as secant modulus.
Which of the above statements are correct?1
1, 2 and 3
2
1 and 3 only
3
1 and 2 only
4
2 and 3 only