Method for in situ determination of concrete strength

Details Method for in situ determination of concrete strength Method for in situ determination of concrete strength

1976-05-26

1977-08-30

Myracle, Jerry W.

Measuring and testing

Ductility or brittleness

G01N 320

Patent

active

040446085

ABSTRACT:
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.

REFERENCES:
patent: 69737 (1867-10-01), Wood
patent: 368508 (1887-08-01), Bishop
patent: 3595071 (1971-07-01), Da Rocha

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