ASTM WK38761

    Revision of C1716 / C1716M - 11 Standard Specification for Compression Testing Machine Requirements for Concrete Masonry Units, Related Units, and Prisms

    (What is a Work Item?)

    Active Standard: C1716 / C1716M - 14

    Developed by Subcommittee: C15.04 | Committee C15 | Contact Staff Manager



    WK38761

    1. Rationale

    Section 4.10 of the standard provides the specific requirements for bearing and support areas for platens and bearing blocks. Annex A1 provides a graphical method for determining compliance with these requirements. While the graphical method is technically correct and exact, it is not easy to apply. A simplified mathematical method for determining compliance with the requirements is proposed. This method is easier to use, but slightly conservative when compared with the graphical solution. Either method is acceptable, and it is not necessary to comply with both (although compliance with the mathematical solution will also be compliant with the graphical solution). This ballot also includes some additional modifications: The current figure A1.2 shows both how to determine usable bearing and support areas for lower platens as well as effect of spacers. This figure is replaced with new figures A1.4 (bearing and support areas) and A1.5 (effect of bearing block and spacer). Current Section A1.3 and Figure A1.3 do not belong in the Annex. They instead relate to the information contained in the Appendix of ASTM C1716 (Maximum Allowable Machinery Capacity Based on Differential Strain). This ballot proposes to move them to the appropriate part of the standard.


    Keywords

    bearing block; bearing surface; load frame; platen; spacer; testing machine;
    Citing ASTM Standards
    Back to Top
    Work Item Status

    Date Initiated:
    08-15-2012

    Technical Contact:
    Ray Henderson

    Item:
    003

    Ballot:
    C15.04 (15-02)

    Status:
    In Balloting

    Item:
    029

    Ballot:
    C15 (12-02)

    Status:
    Ballot Item Approved as C1716/C1716M-2012 and Pending Publication

    Item:
    030

    Ballot:
    C15 (12-02)

    Status:
    Ballot Item Approved as C1716/C1716M-2012 and Pending Publication