ASTM WK69761

    Revision of C457 / C457M - 16 Standard Test Method for Microscopical Determination of Parameters of the Air-Void System in Hardened Concrete

    (What is a Work Item?)

    Active Standard: C457 / C457M - 16

    Developed by Subcommittee: C09.65 | Committee C09 | Contact Staff Manager



    WK69761


    Keywords

    air content; air void parameters of hardened concrete; area-prepared surface required; average chord-length of voids; determination of air-void parameters; entrained void; entrapped void; grits for lapping hardened concrete; index point; lapping; length of traverse required; linear-traverse method; microscopical; number of points required; paste-air ratio; paste-air ratio modification; paste content; point-count method (modified); specimen preparation for microscopical analysis; spacing factor; specific surface; void frequency; water void ;;

    Rationale

    Revision to the standard to include the results from the ILS study with regards to Precision and Bias.

    Citing ASTM Standards
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    Work Item Status

    Date Initiated:
    09-03-2019

    Technical Contact:
    Jamison Langdon

    Status:
    Draft Under Development