Concept: As per IS 456:2000, the modulus of elasticity of concrete is given by: E=5000√fck Where, fck= characteristic strength of concrete (
N
mm2
) and E= Modulus of elasticity of concrete (MPa) Long term elastic modulus of concrete is given by: Effective modulus left(Ec) of elasticity is given by:
Ec
1+θ
Where theta is the creep coefficient depending upon the age of the concrete.