Method for in situ determination of concrete strength

摘要

A method is provided for assessing the strength of a concrete structure by determining the flexural strength at a test section at the base of a concrete core projection established by disposing a tubular form element in the freshly poured and levelled concrete and removing the tubular form when the concrete has hardened sufficiently. A special load cell is inserted in the surface opening of the slit left in the concrete by the tubular form and the load cell activated to apply a recordable, gradually increasing force to the top of the core projection until rupture occurs at the base of the core projection. The flexural strength of the test section is then derived from recordings of the applied force at the moment of rupture.