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    Preliminary Study of Lime-Pozzolan Based Cement after Exposed to High Temperatures

    Access Status
    Fulltext not available
    Authors
    Lee, H.
    Vimonsatit, Vanissorn
    Date
    2014
    Type
    Journal Article
    
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    Citation
    Lee, H. and Vimonsatit, V. 2014. Preliminary Study of Lime-Pozzolan Based Cement after Exposed to High Temperatures. International Journal of Advances in Agricultural & Environmental Engineering. 1 (1): pp. 6-12.
    Source Title
    Int'l Journal of Advances in Agricultural & Environmental Engg. (IJAAEE)
    DOI
    10.15242/IJCCIE.C1113044
    ISSN
    2349-1523
    School
    Department of Civil Engineering
    URI
    http://hdl.handle.net/20.500.11937/36950
    Collection
    • Curtin Research Publications
    Abstract

    This paper presents a preliminary study on the properties of lime-pozzolan based cement and the effect of high temperatures on these properties. Conventional lime-pozzolan cements (LPC), alkali-activated LPC and hybrid alkali-activated LPC pastes were experimentally investigated. Microstructural analyses were performed based on XRD and SEM tests to identify the hydration products. Based on the results, the strength improvement of hybrid alkali-activated LPC cement, where ordinary Portland cement (OPC) was used to enhance the early age strength, could be due to (i) the dissolution of Ca(OH)2 in the mixtures, and (ii) the pozzolanic effect of pozzolanic materials, which interacted with the free Ca(OH)2 during hydration. The residual strength results indicated that the materials lost the strength gradually when exposed to the temperature up to 400°C, except for hybrid cement which showed a slight increase in strength. The microstructure analysis results indicated that the deterioration of the materials was due to the decomposition of hydration products at high temperature.

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