ASTM WK42871

    Work Item: ASTM WK42871 - Revision of C204 - 11 Standard Test Methods for Fineness of Hydraulic Cement by Air-Permeability Apparatus

    (What is a Work Item?)

    Active Standard: C204 - 11

    Developed by Subcommittee: C01.25 | Committee C01 | Contact Staff Manager



    1. Rationale

    The current ASTM procedure includes two options for calibration of the permeability cell used in the determination of the specific surface area. Option #1 includes determination by physical measurement and option #2 is a mercury displacement method. It is proposed to remove option #2 from the standard due to possible harmful health effects from exposure to mercury vapors during the calibration. In the Referenced Documents, Section 2.2, the Britsh Standard BS 4359 needs the date changed to 1982.


    Keywords

    air-permeability; apparatus; fineness: Air permeance/permeability; Blaine fineness test; Fineness--hydraulic cement (blended/portland); Hydraulic cement concrete; Portland cement;
    Citing ASTM Standards
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    Work Item Status

    Date Initiated:
    07-17-2013

    Technical Contact:
    Robert Kersey

    Item:
    001

    Ballot:
    C01.25 (13-01)

    Status:
    Withdrawn From Balloting

    Item:
    004

    Ballot:
    C01 (14-01)

    Status:
    Negative Votes Need Resolution