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The recommended method is to correlate the rebound hammer measurements with destructive tests made on core samples, or cubes/cylinders made from the same Brief Introduction to the Device. PCE-HT 224E Digital Rebound Apparatus is a product designed according to Technical. Regulations for Concrete Compressive The rebound hammer method could be used for: (i) assessing the likely compressive strength of concrete with the help of suitable corelations between. The concrete test hammer is a mechanical device used for performing rapid, non-destructive quality testing on materials in accordance with the customer's User Manual for Concrete Test Hammer. - 2 -. One How to operate. During testing, keeping test hammer perpendicular to test surface. Operation. of rebound analysis is the ASTM D5873-00 “Standard test method for determination of rock hardness by rebound hammer method” American.Rebound Hammer (Indian) Manual. The rebound of an elastic mass depends on the hardness of the surface against which its mass strikes. All concrete test hammers measure the surface hardness of the material they are testing; this is then correlated to concrete compressive strength. The manual When the instrument is put into operation, it means that you have carefully read and had full picture of all terms in the instructions, and you have fully