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The rebound hammer method could be used for: assessing the likely compressive strength of concrete with the help of suitable corelations between rebound index and compressive strength, assessing the uniformity of concrete, assessing the quality of the concrete in relation to standard requirements, and.
A Rebound hammer test graph is prepared after obtaining the correlation between compressive strength and rebound number (rebound index), the strength of the structure can be assessed.
NOTE - The rebound hammer method can be used with greater confidence for differentiating between the questionable and acceptable parts of a structure
The rebound hammer test is currently the most common method of testing the hardness of concrete and was first developed in Switzerland in the 1950s as the Schmidt rebound hammer (sometimes known as the Swiss hammer) [11]. In 1950 Ernst Schmidt created the first rebound hammer, which proved to
Rebound hammer test method is based on the principle that the rebound of an elastic mass depends on the hardness of the concrete surface against which the mass strikes. The operation of the rebound hammer is shown in figure-1.
The Rebound Hammer has been around since the late 1940’s and today is a commonly used method for estimating the compressive strength of in-place concrete. Developed in 1948 by a Swiss engineer named Ernst Schmidt, the device measures the hardness of concrete surfaces using the rebound principle. The device is often referred to as a Swiss Hammer.
UTC-3028 Concrete Test Hammer (Schmidt Hammer N Type) is used to measure the compressive strength characteristics of hardened concrete non-destructively, control uniform concrete quality and detect weak spots in the concrete.
