ASTM WK64552

    Revision of C231 / C231M - 17a Standard Test Method for Air Content of Freshly Mixed Concrete by the Pressure Method

    (What is a Work Item?)

    Active Standard: C231 / C231M - 17a

    Developed by Subcommittee: C09.60 | Committee C09 | Contact Staff Manager



    WK64552


    Keywords

    air content; calibration; concrete; correction factor; measuring bowl; meter; pressure; pump; unit weight ;;

    Rationale

    Current calibration wording does not specify that the cover assembly and measuring bowl are not interchangeable between different meters (unless a new calibration is performed). This ballot is to clarify that only air meter parts calibrated together are valid for testing.

    Citing ASTM Standards
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    Work Item Status

    Date Initiated:
    07-26-2018

    Technical Contact:
    Frances Griffith

    Status:
    Draft Under Development