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Table 2 Approximate value for concrete initial modulus of elasticity

From: Numerical simulation of the experimental behavior of RC beams at elevated temperatures

Modulus of Elasticity (MPa) References
E0 = 4700 (σcu).5 [34]
E0 = 124.31 σcu + 22,636 [35]
E0 = 22,000 (0.1 σcu).3 [36]