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Schmidt hammer test

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This is a rebound hammer method based on the principle that the rebound of an elastic mass depends on the hardness of the surface that it strikes.

The method can be useful in supplementing core testing by locating areas of potential weakness or variability and avoiding destructiveness.

The rebound number obtained from a Schmidt Hammer is correlated with concrete cube crushing strength. This method is used for in-situ concrete strength tests in various structural elements.