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    Room temperature alkali activation of fly ash: The effect of Na2O/SiO2 ratio

    Access Status
    Fulltext not available
    Authors
    Bignozzi, M.
    Manzi, S.
    Natali, M.
    Rickard, William
    Van Riessen, Arie
    Date
    2014
    Type
    Journal Article
    
    Metadata
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    Citation
    Bignozzi, M. and Manzi, S. and Natali, M. and Rickard, W. and Van Riessen, A. 2014. Room temperature alkali activation of fly ash: The effect of Na2O/SiO2 ratio. Construction and Building Materials. 69: pp. 262-270.
    Source Title
    Construction and Building Materials
    DOI
    10.1016/j.conbuildmat.2014.07.062
    ISSN
    0950-0618
    School
    Department of Imaging and Applied Physics
    URI
    http://hdl.handle.net/20.500.11937/40039
    Collection
    • Curtin Research Publications
    Abstract

    Alkali activation of fly ash can be considered as one of the more promising alternative systems to traditional hydraulic binders, particularly if the process can be carried out at room temperature. With the aim of finding the best solution chemistry for room temperature activation, two types of fly ash have been activated using Na2O/SiO2 molar ratio ranging from 0.12 to 0.20. It was found that the behaviour of the resultant geopolymer and mortars in the fresh and hardened state is more influenced by the type of fly ash, in particular by their fineness and mineralogical composition, than by the increasing proportion of sodium silicate solution in the mix.

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