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    Effect of the calcinations temperatures of phosphate washing waste on the structural and mechanical properties of geopolymeric mortar

    TitleEffect of the calcinations temperatures of phosphate washing waste on the structural and mechanical properties of geopolymeric mortar
    Publication TypePapers in International Journals
    Year of Publication2018
    AuthorsDabbebi R., Aguiar, J. B., Camões A., Samet B., and s. Baklouti
    Abstract

    The phosphate industry is facing serious environmental problems. This issue is caused by the waste after
    the extraction of the phosphate ore. The waste termed as phosphate washing waste (PWW) was filtered
    and dried at 105 ºC for 24 h to remove the water. The dried PWW was milled, sieved in a 100 mm sieve
    and characterized by X-ray fluorescence (XRF). The resulting waste was calcined at 600, 700 and 800 ºC, the calcined and uncalcined waste were investigated by X-ray powder diffraction (DRX), Fourier transform infrared (FTIR), simultaneous differential thermal and thermogravimetric analyses (DSC-TG) and scanning electron microscope (SEM). The PWW was activated with sodium hydroxide (NaOH) and sodium silicate to produce geopolymeric materials. It was found that the calcination temperature and the extra water added to the mixture to assure the good workability play an important role on the development of the system’s workability and compressive strength.

    JournalConstruction and Building Materials
    Volume185
    Pagination489 - 498
    Date Published2018-10-01
    PublisherElsevier
    DOI10.1016/j.conbuildmat.2018.07.045
    KeywordsGeopolymeric mortar, Phosphate washing waste, Sodium hydroxide, Sodium silicate
    RightsembargoedAccess (2 Years)
    Peer reviewedyes
    Statuspublished
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    About CTAC

    The Centre for Territory, Environment and Construction (CTAC) is a research unit of the School of Engineering of University of Minho (UMinho), recognised by the “FCT – Fundação para a Ciência e Tecnologia” (Foundation for Science and Technology), associated to the Department of Civil Engineering (DEC), with whom it shares resources and namely human resources.

    Currently CTAC aggregates 25 researchers holding a PhD of which 20 are faculty professors of the Civil Engineering Department. Read more


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