ASTM WK30440

    Revision of C91 - 05 Standard Specification for Masonry Cement

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    Developed by Subcommittee: C01.11 | Committee C01 | Contact Staff Manager



    WK30440

    1. Rationale

    Certain directions in several cement specifications appear to mandate a fixed mass of cement for (lab) trial batches. If a specific mass of material is called for, it may be more or less than the intended volume of material, setting up a potential conflict in the directions. The mass of cement for mixing trial batches in the lab was always intended to be dependent on the bag weight of the material, as this can vary from one product to another. To correct this confusion, remove the statements that set an exact mass for a given volume of masonry cement and replace this with a statement to obtain bulk density from the bag or material supplier in order to determine the correct mass of cement for trial batches. Because the calculation example is non-mandatory information, remove it from the body of the text and place it in a new appendix along with explanatory language.


    Keywords

    masonry; masonry cement; mortar;
    Citing ASTM Standards
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    Work Item Status

    Date Initiated:
    09-27-2010

    Technical Contact:
    James Farny

    Status:
    Draft Under Development