A Schmidt hammer, also known as a rebound hammer, is a device to measure the elastic properties or strength of concrete or rock, mainly surface hardness and penetration resistance

The hammer measures the rebound of a spring-loaded mass impacting against the surface of a sample. The test hammer hits the concrete at a defined energy. Its rebound is dependent on the hardness of the concrete and is measured by the test equipment. By reference to a conversion chart, the rebound value can be used to determine the concrete’s compressive strength.

BHP provides INAB accredited Schmidt hammer testing to evaluate in situ Concrete strength to clients within the construction industry.