Surface hardenss of large areas of concrete may be surveyed systematically and quickly. A rebound hammer adopts the principle that a mass impacts the concrete surface with a standardised energy and causes local indent. The amount of rebound of the mass is measured and expressed as a resultant indicator of the strength of the concrete...
Hammond Conctrete stock a variety of original 'Schmidt' hammers including the Type N, intended for the non-destructive testing of the quality of the concrete.