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    Thermal properties and residual strength after high temperature exposure of cement mortar using ferronickel slag aggregate

    74915.pdf (1.574Mb)
    Access Status
    Open access
    Authors
    Saha, Ashish
    Sarker, Prabir
    Golovanevskiy, Vladimir
    Date
    2019
    Type
    Journal Article
    
    Metadata
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    Citation
    Saha, A. and Sarker, P. and Golovanevskiy, V. 2019. Thermal properties and residual strength after high temperature exposure of cement mortar using ferronickel slag aggregate. Construction and Building Materials. 199: pp. 601-612.
    Source Title
    Construction and Building Materials
    DOI
    10.1016/j.conbuildmat.2018.12.068
    ISSN
    0950-0618
    School
    School of Civil and Mechanical Engineering (CME)
    Funding and Sponsorship
    http://purl.org/au-research/grants/arc/LE130100053
    URI
    http://hdl.handle.net/20.500.11937/74630
    Collection
    • Curtin Research Publications
    Abstract

    This study evaluates the thermal properties of cement mortar using by-product ferronickel slag (FNS) fine aggregate and its residual strength after high temperature exposure. Compressive strength of mortar increased when FNS was used up to 50% replacement of sand and then reduced with further increase of FNS. Volume of permeable voids (VPV) increased by 4% and 7% respectively for using 50% and 100% FNS fine aggregate. Thermal conductivity of mortar decreased from 2.34 W/m.K for using 100% sand to 1.65 W/m.K and 1.16 W/m.K for 50% and 100% FNS, respectively. Similarly, specific heat increased from 2.18 MJ/m3.K to 2.43 MJ/m3.K for 100% replacement of sand by FNS. These changes of VPV and thermal properties are attributed to the cavity of FNS particles, and their larger size and angular shape. Residual strengths of mortar after exposure to 800 °C were found marginally less for using FNS aggregate. This is attributed to the decrease of thermal conductivity of mortar by FNS. Overall, FNS aggregate showed improved thermal insulating properties and thermal mass of mortar without compromising compressive strength. Therefore, FNS can be considered for use as an energy efficient sustainable building material.

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