General and Specialized Use of the Break-Off Concrete Strength Testing Method

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Title: General and Specialized Use of the Break-Off Concrete Strength Testing Method

Author(s): Einar Dahl-Jorgensen and Randulf Johansen

Publication: Special Publication

Volume: 82

Issue:

Appears on pages(s): 293-308

Keywords: bonding; break-off tests; compressive strength; concretes; nondestructive tests.

Date: 9/1/1984

Abstract:
A reliable in-situ testing method such as break-off provides a more accurate estimate of the concrete strength of the structure than site-cured and laboratory-cured standard specimens. Considerable discrepancy was observed between strength measured in the structure and on separate specimens cast from the same mix. The test method also proved to be useful when testing bonding strength of concrete overlays and epoxy coating to concrete.