ASTM WK21221

    New Practice for indication of early-age mechanical properties of cementitious mixtures by temperature measurements

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    Developed by Subcommittee: C09.23 | Committee C09 | Contact Staff Manager



    WK21221

    1. Scope

    This method is to determine relative difference in time at which a fraction of the temperature rise occurs for mortar or concrete mixtures. The temperature rise associated with the exothermic reaction can be an indication of the development of the early age mechanical properties such as strength development and setting time, which are important when estimating engineering properties such as saw cutting time and finishing time.

    This will be useful it determining relative differences in hydration associated with temperature rise. These differences in temperature rise are related to strength gain and setting. This test is faster, easier to run, and less labor intensive then typical strength and setting tests. It is most useful in cases where the investigator is trying to determine the relative difference of changing mixture design parameters. This is most useful to concrete producers or suppliers to concrete producers technical services.


    Keywords

    fraction of temperature rise time; thermal measurement; calorimetry; setting time

    The title and scope are in draft form and are under development within this ASTM Committee.

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    Work Item Status

    Date Initiated:
    09-10-2008

    Technical Contact:
    Mark Niemuth

    Item:
    001

    Ballot:
    C09.23 (14-02)

    Status:
    In Balloting