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    Results comparison of alkali-reactivity tests for same aggregates, using a kinetic model

    TitleResults comparison of alkali-reactivity tests for same aggregates, using a kinetic model
    Publication TypePapers in International Journals
    Year of Publication2015
    AuthorsGonzalez L. M., Santos Silva A., and Jalali S.
    Abstract

    A kinetic based comparison between expansion tests for alkali-aggregate reactivity was
    carried out deriving critical rates from test criteria, in an earlier paper. The present paper checks the
    assumptions and models of that earlier comparison against results with real aggregates varying in
    alkali reactivity. Using the same approach, for each aggregate, expansion rates for three expansion
    tests were estimated, corrected for alkalinity and depicted as an Arrhenius plot. The relationship
    used data from NF P18-590, ASTM C 1260 and ASTM C 227 expansion test-methods and shows
    linear Arrhenius plots for several aggregates, aligned almost parallel to the line obtained for test
    criteria. Aspects related to the different experimental conditions on test-methods and their effects
    are discussed. The proposed conclusion is that both standards and aggregate results, in the given
    conditions, are not inconsistent from the kinetic point of view. Some suggestions are made for
    improving the accuracy of the relationship obtained.

    JournalKey Engineering Materials
    Volume634
    Pagination498-505
    Date Published2015-02-01
    PublisherTrans Tech Publications Ltd
    ISSN1013-9826
    DOIdoi:10.4028/www.scientific.net/KEM.634.498
    KeywordsAggregates, alkali-silica reaction, Expansion tests, reactivity
    RightsopenAccess
    Peer reviewedyes
    Statuspublished
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    About CTAC

    The Centre for Territory, Environment and Construction (CTAC) is a research unit of the School of Engineering of University of Minho (UMinho), recognised by the “FCT – Fundação para a Ciência e Tecnologia” (Foundation for Science and Technology), associated to the Department of Civil Engineering (DEC), with whom it shares resources and namely human resources.

    Currently CTAC aggregates 24 researchers holding a PhD of which 20 are faculty professors of the Civil Engineering Department. Read more


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