Article

International Journal of Minerals, Metallurgy, and Materials

, Volume 21, Issue 1, pp 89-94

Fabrication and properties of foam geopolymer using circulating fluidized bed combustion fly ash

  • Ze LiuAffiliated withSchool of Chemical and Environmental Engineering, China University of Mining & Technology Email author 
  • , Ning-ning ShaoAffiliated withSchool of Chemical and Environmental Engineering, China University of Mining & Technology
  • , Dong-min WangAffiliated withSchool of Chemical and Environmental Engineering, China University of Mining & Technology
  • , Jun-feng QinAffiliated withSchool of Chemical and Environmental Engineering, China University of Mining & Technology
  • , Tian-yong HuangAffiliated withSchool of Chemical and Environmental Engineering, China University of Mining & Technology
  • , Wei SongAffiliated withSchool of Chemical and Environmental Engineering, China University of Mining & Technology
  • , Mu-xi LinAffiliated withSchool of Chemical and Environmental Engineering, China University of Mining & Technology
  • , Jin-sha YuanAffiliated withSchool of Chemical and Environmental Engineering, China University of Mining & Technology
  • , Zhen WangAffiliated withSchool of Chemical and Environmental Engineering, China University of Mining & Technology

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Abstract

In recent years, circulating fluidized bed combustion fly ash (CFA) is used as a raw material for geopolymer synthesis. Hydrogen peroxide was employed as a foaming agent to prepare CFA-based foam geopolymer. The particle distribution, mineral composition, and chemical composition of CFA were examined firstly. Geopolymerization products were characterized by mechanical testing, scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray fluorescence (XRF). The CFA-based foam geopolymer was successfully fabricated with different contents of hydrogen peroxide and exhibited uncompleted alkali reaction and reasonable strength with relative low atomic ratios of Si/Al and Si/Na. Type-C CFA in this research could be recycled as an alternative source material for geopolymer production.

Keywords

fly ash geopolymers foamed products microstructure hydrogen peroxide