A Rapid Autoclave Mortar Bar Method to Determine the Potential Alkali-Silica Reactivity of St. Lawrence Lowlands Carbonate Aggregates (Quebec, Canada)

    Volume 13, Issue 1 (July 1991)

    ISSN: 0149-6123

    CODEN: CCAOAD

    Page Count: 14


    Fournier, B
    Research scientist, Concrete Technology Section, CANMET, Ottawa, Ontario

    Bergeron, G
    Graduate student, Laval University, Quebec City,

    Berubé, M-A
    Professeur titulaire, Laval University, Quebec City,

    Abstract

    An autoclave mortar bar method is proposed to evaluate the potential alkali-silica reactivity of the limestone and dolostone aggregates produced in the St. Lawrence Lowlands. The influence of various parameters on the test results and the precision of the adopted test procedure were first evaluated. The method was then applied to 40 carbonate aggregates sampled along the St. Lawrence Lowlands. Expansion limits are suggested based on the behavior of these aggregates under standard testing conditions and on field performance. The reaction products developed in the mortar bars during the test, as observed under the SEM, were also investigated.


    Paper ID: CCA10550J

    DOI: 10.1520/CCA10550J

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    Author
    Title A Rapid Autoclave Mortar Bar Method to Determine the Potential Alkali-Silica Reactivity of St. Lawrence Lowlands Carbonate Aggregates (Quebec, Canada)
    Symposium , 0000-00-00
    Committee C01