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    Mix design, properties and cost analysis of fly ash-based geopolymer foam

    TitleMix design, properties and cost analysis of fly ash-based geopolymer foam
    Publication TypePapers in International Journals
    Year of Publication2015
    AuthorsAbdollahnejad Z., Pacheco-Torgal, F., Felix T., Tahri W., and Aguiar, J. B.
    Abstract

    This study has investigated the joint effect of several mix parameters on the properties of foam geopolymers. The mix parameters analysed through a laboratory experiment of 54 different mortar mixes were, sodium silicate/sodium hydroxide mass ratio (2.5, 3.5, 4.5), activator/binder mass ratio (0.6, 0.8, 1.0), chemical foaming agent type (hydrogen peroxide (H2O2) and sodium perborate (NaBO3)) and foaming agent mass ratio content (1%, 2%, 3%). Properties, SEM and FTIR analysis and cost analysis are included. The results show that the sodium perborate over performs hydrogen peroxide leading to a lower overall thermal conductibility of foam geopolymers. Mixtures with a low thermal conductivity of around 0.1 W/ (m K) and a compressive strength of around 6 MPa were achieved. The cost analysis show that the foaming agents are responsible for a small percentage of foam geopolymers total cost being that the alkaline activators are responsible for more than 80%.

    JournalConstruction and Building Materials
    Volume80
    Pagination18-30
    Date Published2015-04-01
    PublisherElsevier
    ISSN0950-0618
    DOI10.1016/j.conbuildmat.2015.01.063
    KeywordsEnergy Efficiency, Foam geopolymers, Mix design; Cost analysis, Thermal insulators
    Citation

    Abdollahnejad et al.

    RightsopenAccess
    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 24 researchers holding a PhD of which 20 are faculty professors of the Civil Engineering Department. Read more


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