Volume 38, Issue 4 (July 2010)

    Effect of Variations in Practice of ASTM D7522 Standard Pull-Off Test for FRP-Concrete Interfaces

    (Received 6 August 2009; accepted 8 January 2010)

    Published Online: 2010

    CODEN: JTEOAD

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    Abstract

    The recently promulgated ASTM D7522 Standard Test Method for Pull-Off Strength for FRP Bonded to Concrete Substrate provides a method for quality control and acceptance testing of fiber reinforced polymer (FRP) systems adhesively bonded to a concrete substrate. In the process of developing ASTM D7522, a number of comments and questions were received—some were incorporated as best practices and some were tabled, requiring further investigation. The present study addresses the latter issues and thereby directs future amendments of the ASTM D7522 standard method. Specifically, this study addresses the effects of specimen shape, the effects of variation in specimen cut depth, methods of cutting square specimens, and the impact of retesting specimens that do not fail during their initial test. It is shown that square specimens should be permitted although their results may not be directly compared with round specimens and they may have some other practical considerations affecting their use. Additionally, it is shown that cutting too deeply into the concrete substrate results in lower values of pull-off strength.


    Author Information:

    Eveslage, Troy
    Undergraduate Research Assistant, Dept. of Civil Engineering, Rose Hulman Institute of Technology, Terre Haute, IN

    Aidoo, John
    Assistant Professor, Dept. of Civil Engineering, Rose Hulman Institute of Technology, Terre Haute, IN

    Harries, Kent A.
    Associate Professor, Dept. of Civil and Environmental Engineering, Univ. of Pittsburgh, Pittsburgh, PA

    Bro, William
    Undergraduate Research Assistant, Dept. of Mechanical Engineering, Rose Hulman Institute of Technology, Terre Haute, IN


    Stock #: JTE102682

    ISSN: 0090-3973

    DOI: 10.1520/JTE102682

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    Author
    Title Effect of Variations in Practice of ASTM D7522 Standard Pull-Off Test for FRP-Concrete Interfaces
    Symposium , 0000-00-00
    Committee D30