ASTM WK64786

    Revision of D2639 / D2639M - 16 Standard Test Method for Plastic Properties of Coal by the Constant-Torque Gieseler Plastometer

    (What is a Work Item?)

    Active Standard: D2639 / D2639M - 21

    Developed by Subcommittee: D05.15 | Committee D05 | Contact Staff Manager



    WK64786


    Keywords

    carbonization; contraction; dial divisions; expansion; fluidity; gieseler; plasticity; rheology;;

    Rationale

    The following revisions are being proposed in order to attempt to standardize the reported measurements for maximum DDPM, and solidification temperature. The figures for the loading devices depicted in the current standard are incorrect. A new figure for the drop weight loading device is proposed. A majority of users have indicated that under normal laboratory operations samples prepared for analysis are not air-dried to constant mass. There is no statistical basis for the current procedure of running a third determination if duplicate analyses fail repeatability and eliminating of one of the three determinations.

    Citing ASTM Standards
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    Work Item Status

    Date Initiated:
    08-14-2018

    Technical Contact:
    Michael Carmon

    Item:
    001

    Ballot:
    D05 (21-05)

    Status:
    In Balloting

    Item:
    002

    Ballot:
    D05 (21-05)

    Status:
    In Balloting

    Item:
    003

    Ballot:
    D05 (21-05)

    Status:
    In Balloting

    Item:
    004

    Ballot:
    D05 (21-05)

    Status:
    In Balloting

    Item:
    005

    Ballot:
    D05 (21-05)

    Status:
    In Balloting

    Item:
    005

    Ballot:
    D05 (18-04)

    Status:
    Ballot Item Approved as D2639/D2639M-2019 and Pending Publication

    Item:
    005

    Ballot:
    D05 (21-01)

    Status:
    Ballot Item Approved as D2639/D2639M-2021 and Pending Publication

    Item:
    006

    Ballot:
    D05 (21-01)

    Status:
    Ballot Item Approved as D2639/D2639M-2021 and Pending Publication

    Item:
    007

    Ballot:
    D05 (21-01)

    Status:
    Ballot Item Approved as D2639/D2639M-2021 and Pending Publication

    Item:
    008

    Ballot:
    D05 (21-01)

    Status:
    Ballot Item Approved as D2639/D2639M-2021 and Pending Publication

    Item:
    009

    Ballot:
    D05 (21-01)

    Status:
    Ballot Item Approved as D2639/D2639M-2021 and Pending Publication

    Item:
    010

    Ballot:
    D05 (21-01)

    Status:
    Ballot Item Approved as D2639/D2639M-2021 and Pending Publication

    Item:
    011

    Ballot:
    D05 (21-01)

    Status:
    Ballot Item Approved as D2639/D2639M-2021 and Pending Publication