ASTM WK46094

    Revision of C172 / C172M - 14 Standard Practice for Sampling Freshly Mixed Concrete

    (What is a Work Item?)

    Active Standard: C172 / C172M - 14a

    Developed by Subcommittee: C09.60 | Committee C09 | Contact Staff Manager



    WK46094

    1. Rationale

    This is to address concerns by negative voters that the newly adopted language 5.2.4 Sampling from Continuous MixersSample the concrete after the mixture has achieved uniformity of color and texture following all mix proportioning adjustments. is too subjective. The negatives were withdrawn, with the agreement that we would take this up as new business. This revision provides more precise and objective criteria, that ensures that any samples taken will be after all adjustments have been made, and that adjusted concrete has reached the discharge point.


    Keywords

    air content; batch; composite sample; concrete; slump; temperature; wet-sieving ;
    Citing ASTM Standards
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    Work Item Status

    Date Initiated:
    05-09-2014

    Technical Contact:
    Darrell Elliot

    Status:
    Draft Under Development