ASTM WK41977

    Work Item: ASTM WK41977 - Revision of C469 / C469M - 10 Standard Test Method for Static Modulus of Elasticity and Poisson's Ratio of Concrete in Compression

    (What is a Work Item?)

    Active Standard: C469 / C469M - 10

    Developed by Subcommittee: C09.61 | Committee C09 | Contact Staff Manager



    1. Rationale

    There is a requirement in Section 4.3 that the displacement sensor for the horizontal extensometer has to be able to read to the nearest 1.27 m [50 in.]. This is only applicable if the extensometer has a magnification of 2. The governing requirement for the extensometer assembly is that the change in diameter has to be able to be measured to the nearest 0.5 m [25 in]. So the required resolution of the displacement sensor will depend on the design of the extensometer. Revisions are proposed to clarify the text and add a new Note to discuss the required resolution of the sensor.


    Keywords

    compression testing; concrete; modulus of elasticity; Poisson's ratio; Modulus of elasticity--concrete; Poisson's ratio; Static modulus of elasticity; Young's modulus;
    Citing ASTM Standards
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    Work Item Status

    Date Initiated:
    05-02-2013

    Technical Contact:
    Wilma Morrison

    Status:
    Draft Under Development