ASTM WK32544

    Revision of C457 / C457M - 10a 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 - 12

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


    1. Rationale

    To update or revise miscellaneous areas of the standard. Where appropriate, to revise values to agree with ACI documents.


    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); sample preparation for microscopical analysis; spacing factor; specific surface; void frequency; water void; Air content--concrete; Air voids; Hardened concrete; Linear traverse (Rosiwal) method; Microscopic examination--concrete; Modified point-count method; Petrographic analysis; Pore structure; Spacing factor; Surface analysis--concrete;
    Citing ASTM Standards
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    Work Item Status

    Date Initiated:

    Technical Contact:
    Nick Scaglione


    C09 (12-04)

    Ballot Item Approved as C457/C457M-2012 and Pending Publication