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    Effect of cooling regime on the residual performance of high-volume palm oil fuel ash concrete exposed to high temperatures

    Access Status
    Fulltext not available
    Authors
    Awal, A.
    Shehu, I.
    Ismail, Mohamed
    Date
    2015
    Type
    Journal Article
    
    Metadata
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    Citation
    Awal, A. and Shehu, I. and Ismail, M. 2015. Effect of cooling regime on the residual performance of high-volume palm oil fuel ash concrete exposed to high temperatures. Construction and Building Materials. 98: pp. 875-883.
    Source Title
    Construction and Building Materials
    DOI
    10.1016/j.conbuildmat.2015.09.001
    ISSN
    0950-0618
    School
    Curtin Malaysia
    URI
    http://hdl.handle.net/20.500.11937/71596
    Collection
    • Curtin Research Publications
    Abstract

    This paper presents the experimental findings of a study on the effect of cooling method on the residual performance of concrete containing a high volume of palm oil fuel ash (POFA) exposed to high temperatures. In this study, concrete samples were made in which the ordinary Portland cement was replaced by 50%, 60% and 70% POFA. The test specimens were then thermally treated to elevated temperatures of 200, 400, 600 and 800 °C in an electric furnace for a period of 1 h. The specimens were cured by air cooling or water cooling and examined for ultrasonic pulse velocity and changes in weight and residual compressive strength. At higher temperatures, the reduction in the ultrasonic pulse velocity of concrete was higher for all of the mixes. Along with the loss of weight, the residual compressive strength of concrete was also reduced. Of the two regimes, the air-cooling system exhibited better performance in recovering the structural properties of concrete containing a high volume of POFA.

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