From Civil Engineering Formulas

MODULUS OF ELASTICITY OF CONCRETE

The modulus of elasticity of concrete E c adopted in modified form by the ACI Code is given by


With normal-weight, normal-density concrete these two relations can be simplified to


where E c = modulus of elasticity of concrete, lb/in 2 (MPa); and = specified 28-day compressive strength of concrete, lb/in 2 (MPa).

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