The effect of calcination time upon the slaking properties of quicklime

Dorn Carran, John Hughes, Alick Leslie, Craig J Kennedy

    Research output: Chapter in Book/Report/Conference proceedingChapter (peer-reviewed)

    1 Citation (Scopus)

    Abstract

    An experiment was conducted to determine how the slaking characteristics of quicklime produced from the calcination of selected limestones relates to the calcination time. The experiment also permitted the determination of the optimum calcination time by determining when each limestone was under or over burnt (as indicated by minimum water reactivity values). Four limestones, three from Scotland Dornie, Parkmore, Trearne and one from England - Ham Hill, were calcined at 900oC for a range of times between 2 and 5 h. The limestones used include both granoblastic metamorphic and bioclastic-micritic limestones with variable silicate contents. The resulting quicklimes were tested for reactivity by recording temperature rise and rate of temperature rise during slaking. Sieve analysis of the residue after slaking was performed on some samples. The Dornie limestone was the most reactivewith an optimum calcination time of 4 h. Ham Hill was the second most reactive with an optimum calcination time of 3.5 h. Trearne followed at 4 h and the least reactive was the Parkmore sample with an optimum calcination time of 4.5 h. Dornie, Ham Hill and Trearne limestones underwent complete calcination with a weight loss greater than 40%. The experiment showed that the determination of the optimum calcination time through the examination of water reactivity was possible.
    Original languageEnglish
    Title of host publicationHistoric Mortars
    Subtitle of host publicationCharacterisation, Assessment and Repair
    EditorsJan Valek, John J. Hughes, Caspar J.W.P. Groot
    PublisherSpringer
    Pages283-295
    Number of pages13
    ISBN (Electronic)978-94-007-4635-0
    ISBN (Print)978-94-007-4634-3
    DOIs
    Publication statusPublished - 2012

    Publication series

    NameRILEM Bookseries
    Volume7
    ISSN (Print)2211-0844

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