### ALL ABOUT CIVIL: Compressive strength of concrete

Mar 21, 2013· These specimens are tested by compression testing machine after 7 days curing or 28 days curing. Load should be applied gradually at the rate of 140 kg/cm2 per minute till the Specimens fails. Load at the failure divided by area of specimen gives the compressive strength of concrete.

### What Is Concrete Compressive Strength? (with pictures)

Jun 23, 2019· While concrete has a fairly high compressive strength, it generally has a poor tensile strength. Many installers add reinforcement steel or rebar to improve the tensile strength of concrete. To increase compressive strength, it is often necessary to .