Enhanced properties of graphene/fly ash geopolymeric composite cement

Saafi, Mohamed and Tang, Pik Leung and Fung, Jason and Rahman, Mahbubur and Liggat, John (2015) Enhanced properties of graphene/fly ash geopolymeric composite cement. Cement and Concrete Research, 67. 292–299. ISSN 0008-8846 (https://doi.org/10.1016/j.cemconres.2014.08.011)

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Abstract

This paper reports for the first time the incorporation of in-situ reduced graphene oxide (rGO) into geopolymers. The resulting rGO-geopolymeric composites are easy to manufacture and exhibit excellent mechanical properties. Geopolymers with graphene oxide (GO) concents of 0.00, 0.10, 0.35 and 0.50% by weight were fabricated. The functional groups, morphology, void filling mechanisms and mechanical properties of the composites were determined. The Fourier transform infrared (FTIR) spectra revealed that the alkaline solution reduced the hydroxyl/carbonyl groups of GO by deoxygenation and/or dehydration. Concomitantly, the spectral absorbance related to silica type cross-linking increased in the spectra. The scanning electron microscope (SEM) micrographs indicated that rGO altered the morphology of geopolymers from a porous nature to a substantially pore filled morphology with increased mechanical properties. The flexural tests showed that 0.35-wt% rGO produced the highest flexural strength, Young’s modulus and flexural toughness and they were increased by 134%, 376% and 56%, respectively

  • Item type:Article
    ID code:50150
    Dates:
    Date
    Event
    January 2015
    Published
    1 November 2014
    Published Online
    27 August 2014
    Accepted
    Notes:NOTICE: this is the author's version of a work that was accepted for publication in Cement and Concrete Research. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Cement and Concrete Research, [VOL 67, (1/1/15)] DOI: 10.1016/j.cemconres.2014.08.011
    Subjects:Technology > Engineering (General). Civil engineering (General)
    Department:Faculty of Engineering > Civil and Environmental Engineering
    Faculty of Science > Pure and Applied Chemistry
    Depositing user: Pure Administrator
    Date deposited:05 Nov 2014 09:41
    Last modified:08 Apr 2024 21:47
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/50150
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