alleryStart learning →Modulus of elasticity for concrete (per IS 456):
ANo formula
B10 GPa
CE_c = 5000 √f_ck (MPa) — for M25, E_c = 25 GPa
D100 GPa
Answer & Solution
Correct answer: C. E_c = 5000 √f_ck (MPa) — for M25, E_c = 25 GPa
**IS 456 approximate:** E_c = 5000 √f_ck MPa. Short-term modulus. For M25: 25 GPa.
Real concrete shows nonlinear, creep, shrinkage behavior — actual modulus varies.
Used as approximation in elastic analysis.
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