alleryStart learning →Modulus of elasticity of concrete (IS code) is approximately:
A100 × f_ck
BRandom
CE_c = 5000 × √f_ck (in MPa)
Df_ck
Answer & Solution
Correct answer: C. E_c = 5000 × √f_ck (in MPa)
**Per IS 456:** E_c = 5000 × √f_ck MPa.
**For M25:** E_c = 5000 × 5 = 25,000 MPa = 25 GPa. M20: ~22.4 GPa.
Concrete's E_c varies with strength, age, mix.
Note this is short-term modulus.
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