A New Method for Evaluating the Risk of DEF

    Volume 26, Issue 2 (December 2004)

    ISSN: 0149-6123


    Page Count: 6

    Tagnit-Hamou, A
    Professor, Université de Sherbrooke, Sherbrooke, Québec

    Petrov, N
    (presently Research Assistant), Université de Sherbrooke, Sherbrooke, Québec

    (Received 24 January 2003; accepted 8 December 2003)


    A new method involving a slight acceleration of curing is proposed to evaluate the sensitivity of a particular cement or particular mortars to DEF and consequent expansion. It can be used to determine the maximum concrete temperature below which the risk of DEF is minimal and acceptable. After a heat curing, the specimens were kept in lime-saturated water. On the seventh day, they were submitted to six daily thermal cycles (+50 to +10°C). Expansion is greater when thermal cycles are applied compared to control specimens. Therefore, the absence of expansion of some mortars submitted to thermal cycles enables us to accept the mix, even if the curing temperature is 90°C. This method has been applied successfully in mortar specimens. It is presently being applied on concrete specimens.

    Paper ID: CCA11864

    DOI: 10.1520/CCA11864

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    Title A New Method for Evaluating the Risk of DEF
    Symposium , 0000-00-00
    Committee C01