Rebound Hammer test : - The non-destructive tests are the group of useful methods to evaluate the strength of construction materials without causing damage. It is not always possible to do destructive tests for the materials of construction like concrete, block and clay bricks, etc. particularly when they are already laid. They are independent tests sufficient to make the structural engineering decisions after establishing figurative substantiation through its application. Rebound hammer test procedure is used to examine the hardness of concrete particularly when you want to carry out repairs of RCC structure.