Rebound Hammer Test-Non Destructive testing on Concrete
Non destructive testing for concrete Non Destructive Testing is the process of detecting the quality without destructing the material or without changing its actual properties. Rebound Hammer is also called as Schmidt hammer or Swiss Hammer or Concrete hammer test. This NDT method is used to detect the strength of Concrete Slab or rock, by identifying the hardness or elastic property. Principle of Rebound Hammer Test. Schmidt’s hammer test is based on the principle of “rebound of a spring loaded mass depends on the hardness of the concrete mass on which the mass strikes”. This rebound distance of the rebounded Plunger mass is noted down in the graduated scale as Rebound number / rebound index. The graph in the body of hammer is used to found out the respective compressive strength. The concrete with low energy and low stiffness absorbs more energy from plunger and produces a low rebound value on the scale. Objective of Hammer rebound test...
