Behaviour of Concrete under compression and tension
T he behaviour of concrete is different when it comes to compression and tension. Usually, concrete performs very well under compressive stresses, but when it is subjected to tensile stresses, its performance is considered inferior. Let us look one by one how concrete behaves under different stresses and what are some terms related to it. The behaviour of concrete under uniaxial compression: IS 456:2000 has stated that to test the compressive strength of concrete specimen of 150 mm cube should be tested after 28 days of curing. Then the testing on the concrete cube is performed. The loading test of the concrete cube is strain-controlled, and the uniform strain rate applied is 0.001 mm/mm/min. IS 456:2000 also recommends testing of 3 samples and the average value of maximum stress should be noted as compressive strength. Now many people may ask why we perform the strain-controlled test and why not stress-controlled test. The answer to this question when we perform a st...