Volume 17, Issue 1 (June 1995)

    Results of an Interlaboratory Test Program: Compressive Strength of Concrete


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    Although both ASTM and CSA have had standards for testing the compressive strength of concrete cylinders since the 1920s, neither standard contains a statement of the within- and between-laboratory precision of its test method as prescribed by Practice for use of the Terms Precision and Bias in ASTM Test Methods (ASTM E 177). This paper describes an interlaboratory study performed by 16 CSA-certified Ontario testing laboratories in accordance with Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method (ASTM E 691). The analysis shows that the variability of the test results increases with the mean strength of the concrete. A precision statement based on the results reported here is recommended for inclusion in Test Method for Compressive Strength of Cylindrical Concrete Specimens (ASTM C 39) and CSA A23.2-9C (Compressive Strength of Cylindrical Concrete Specimens).

    Author Information:

    Bickley, J
    President, John A. Bickley Associates Ltd., Toronto, Ontario

    Thomas, M
    Assistant professor, University of Toronto, Toronto, Ontario

    Detwiler, R
    Senior engineer, Construction Technology Laboratories, Skokie, IL

    Kennedy, S
    Project coordinator, PCL Constructors, Inc., Nepean, Ontario

    Stock #: CCA10330J

    ISSN: 0149-6123

    DOI: 10.1520/CCA10330J

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    Title Results of an Interlaboratory Test Program: Compressive Strength of Concrete
    Symposium , 0000-00-00
    Committee C09