Survey of Practice to Determine Strength of In Situ Concrete from Core Tests
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VIEW THE REPLYPublication: Journal of Performance of Constructed Facilities
Volume 21, Issue 1
Abstract
Practitioners were invited to respond to a problem statement published in the November 2000 issue of the Journal of the Performance of Constructed Facilities asking for an estimate of the compressive strength of in situ concrete based on hypothetical results of compressive tests on ten cores. Responses were received from 23 persons. Several respondents provided more than one estimate. It was found that there were wide variations in practice for determination of compressive strength from cores. Estimates varied from . The most frequent estimate was . The paper presents background information on code provisions relating to core testing, summarizes and discusses the responses, and offers observations based on the responses regarding investigations where compressive strength of concrete in an existing structure is determined from test of cores.
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References
ACI Committee 318. (2002). “Building code requirements for structural concrete (ACI 318-02) and commentary (318R-02).” American Concrete Institute, Farmington Hills, Mich.
ACI Committee 214.4R. (2003). “Guide for obtaining cores and interpreting compressive strength results.” American Concrete Institute, Farmington Hills, Mich.
ACI Committee 437R. (2003). “Strength evaluation of existing concrete buildings.” American Concrete Institute, Farmington Hills, Mich.
Bartlett, F. M., and MacGregor, J. G. (1995). “Equivalent specified concrete strength from core test data.” Concr. Int., 17(3), 52–58.
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© 2007 ASCE.
History
Received: Nov 1, 2005
Accepted: Mar 28, 2006
Published online: Feb 1, 2007
Published in print: Feb 2007
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