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    Effects of seawater-neutralised bauxite refinery residue on properties of concrete

    Access Status
    Fulltext not available
    Authors
    Barbhuiya, Salim
    Basheer, P.
    Clark, M.
    Rankin, G.
    Date
    2011
    Type
    Journal Article
    
    Metadata
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    Citation
    Barbhuiya, S. and Basheer, P. and Clark, M. and Rankin, G. 2011. Effects of seawater-neutralised bauxite refinery residue on properties of concrete. Cement and Concrete Composites. 33 (6): pp. 668-679.
    Source Title
    Cement and Concrete Composites
    DOI
    10.1016/j.cemconcomp.2011.03.010
    ISSN
    0958-9465
    School
    Department of Civil Engineering
    URI
    http://hdl.handle.net/20.500.11937/39780
    Collection
    • Curtin Research Publications
    Abstract

    Various industrial by-products, such as fly ash, ground granulated blast-furnace slag and silica fume, have been used in concrete to improve its properties. This also enables any environmental issues associated with their disposal. Another material that is available in large quantities and requiring alternative methods of disposal is the Bauxite Refinery Reside (BRR) from the Bayer process used to extract alumina from bauxite. As this is highly caustic and causes many health hazards, Virotec International Ltd. developed a patented technology to convert this into a material that can be used commercially, known as Bauxsol™, for various environmental remediation applications. This use is limited to small quantities of seawater-neutralised BRR and hence an investigation was carried out to establish its potential utilisation as a sand replacement material in concrete. In addition to fresh properties of concrete containing seawater-neutralised BRR up to 20% by mass of Portland cement, mechanical and durability properties were determined. These properties indicated that seawater-neutralised BRR can be used to replace natural sand up to 10% by mass of cement to improve the durability properties of concrete without detrimentally affecting their physical properties. Combining these beneficial effects with environmental remediation applications, it can be concluded that there are specific applications where concretes containing seawater-neutralised BRR could be used. © 2011 Elsevier Ltd. All rights reserved.

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