A standard concrete cylinder 150 times 300 mm was tested to failure and the following loads and strains were recorded: Plot the stress-strain curve for the concrete From the plot, find/estimate its...

A standard concrete cylinder 150 times 300 mm was tested to failure and the following loads and strains were recorded: Plot the stress-strain curve for the concrete From the plot, find/estimate its compressive strength (f_c) and the corresponding strain. Using the same plot, find/estimate the tangent modulus of elasticity at 0 45f_c'. The secant modulus of elasticity at 045f_c' Determine the modulus of elasticity of concrete using the prescribed ACI 318-14's equation for normal weight concrete (w_c = 150 pef) How does it compare with the secant modulus calculated in c.2.