Applying fly ash as a high strength water-resistant precast construction material through geopolymerization

J. Zhang, Q. Feng

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Study has been carried out to apply fly ash as a high strength, water-resistant precast construction material through geopolymerization. Experiment results show that the working conditions such as water content, the concentration of NaOH, curing temperature and curing time, significantly affect the mechanical property of geopolymer matrix. Through optimization, an above 100 MPa compressive strength has been achieved with the geopolymerization products. Water soaking tests show that the geopolymerization product has a very high water resistance without losing noticeable compressive strength even after a one month soaking time. To elucidate the geopolymerization mechanism, microscopic techniques such as SEM/EDS and XRD are also applied to investigate the microstructure, the elemental and phase composition of geopolymerization products. The findings of the present work provide a novel method to apply fly ash as a high strength water-resistant precast construction material.

Original languageEnglish (US)
Title of host publication2019 SME Annual Conference and Expo and CMA 121st National Western Mining Conference
PublisherSociety for Mining, Metallurgy and Exploration
ISBN (Electronic)9781510884663
StatePublished - 2019
Event2019 SME Annual Conference and Expo and CMA 121st National Western Mining Conference - Denver, United States
Duration: Feb 24 2019Feb 27 2019

Publication series

Name2019 SME Annual Conference and Expo and CMA 121st National Western Mining Conference

Conference

Conference2019 SME Annual Conference and Expo and CMA 121st National Western Mining Conference
CountryUnited States
CityDenver
Period2/24/192/27/19

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology

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