Inclusion of geopolymers derivate from fly ash and pumice in reinforced concrete

A. M. Montaño, C. P. González, D. Castro, G. Gualdron, R. Atencio

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    This paper presents results of a research project related to the development of alkali-activated geopolymers, synthesized from alumina-silicate minerals (fly ash and pumice) which are added to concrete. Alkali sources used in geopolymer synthesis were sodium hydroxide and sodium silicate solution. New materials were structurally characterized by Infra-Red spectroscopy (IR) and X-Ray Diffraction (XRD). Concretes obtained after geopolymers addition as Portland cement substitutes at 10%, 20% and 30%, were mechanically analysed by compression resistance at 7, 14, 28 and 90 drying days. Results were referred to standard (concrete of Portland cement) allows to know cementitious characteristics of geopolymers are lower than those for standard, but it keeps growing at longer drying time than Portland cement. By Electrochemical Impedance Spectroscopy (EIS) it is found that this new material shows high electrical resistance and have been proved as a protection agent against corrosion in reinforced concrete exhibiting anticorrosive properties higher than those showed by the conventional concrete mixture.

    Original languageEnglish
    Article number012016
    JournalJournal of Physics: Conference Series
    Issue number1
    StatePublished - 29 Dec 2017
    Event4th International Meeting for Researchers in Materials and Plasma Technology, IMRMPT 2017 - Santa Marta, Colombia
    Duration: 23 May 201726 May 2017

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