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    Mica platelet-reinforced geopolymer composites

    Access Status
    Fulltext not available
    Authors
    Keane, P.
    Kutyla, G.
    Wight, J.
    Rickard, William
    Kriven, W.
    Date
    2017
    Type
    Book Chapter
    
    Metadata
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    Citation
    Keane, P. and Kutyla, G. and Wight, J. and Rickard, W. and Kriven, W. 2017. Mica platelet-reinforced geopolymer composites., 13-20.
    DOI
    10.1002/9781119321811.ch2
    ISBN
    9781119040439
    School
    John de Laeter Centre
    URI
    http://hdl.handle.net/20.500.11937/67069
    Collection
    • Curtin Research Publications
    Abstract

    © 2017 by The American Ceramic Society. Composites of phlogopite mica platelets of composition KMg 3 AlSi 3 O 10 (F,OH) 2 dispersed in potassium-based potassium geopolymer were fabricated. The platelet additions of up to 25 wt% were achieved which increased the flexure strength and thermal conductivity of pure potassium-based geopolymer. A maximum 3-point flexure strength at room temperature was measured as 11.4 MPa with a standard deviation of 0.34 MPa for 25 wt% mica additions. Heat treatments caused chemical decomposition and water loss at temperatures up to 700 °C and eventual formation of glassy and crystalline leucite at 1000°C. A maximum post-treatment strength of 10.7 MPa with a standard deviation of 0.52 MPa was obtained for the 1000°C heat-treated samples. The thermal conductivity increased from 0.24 ± 0.000 W/mK for pure K-based geopolymer to 0.30 ± 0.008 W/mK, as a function of mica platelet additions up to 10 wt %.

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