STP1240: Influence of Silica Fume on the Immobilization Properties of Cementitious Mortars Exposed to Freeze-Thaw Cycles

    Quaresima, R
    Professors, University of L'Aquila,

    Scoccia, G
    Professors, University of L'Aquila,

    Volpe, R
    Professors, University of L'Aquila,

    Medici, F
    Professors, University of Rome “La Sapienza”, Rome,

    Merli, C
    Professors, University of Rome “La Sapienza”, Rome,

    Pages: 12    Published: Jan 1996


    Abstract

    This study deals with the durability of immobilization matrices, drawing comparisons among the release characteristics of cementitious mortars with or without silica fume, before and after freezing-thawing cycles. Three different dosages of silica fume have been experimented, using silica fume as a substitute of cement. The results obtained from the leaching tests have emphasized, in all the matrices which had undergone the freeze-thaw cycles, an increase of the percentage of tracer released with respect to the same matrices before the freezing-thawing cycles. As a consequence of the freezing-thawing cycles, the velocity of release has also increased in all the experimented matrices. However, the tests have reconfirmed the positive effect of the addition of silica fume.

    Keywords:

    hazardous wastes, immobilization, cementitious matrices, silica fume, freeze-thaw durability


    Paper ID: STP14109S

    Committee/Subcommittee: D34.01

    DOI: 10.1520/STP14109S


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