Review on Influencing Factors of Mechanical Properties of Fly Ash Geopolymer

Abstract

Abstract: Fly ash geopolymer is prepared by using fly ash as a silico-alumina raw material. It has the advantages of high strength, high-temperature resistance, corrosion resistance, and effective sealing of metal ions. However, its inherent brittleness and the need for high-temperature curing to quickly obtain high strength limits its scope of application, and the use of fiber as a reinforcing material for fly ash geopolymer can not only increase its strength, but also improve its ductility and toughness. Starting from four aspects: the characteristics of fly ash raw materials, alkali activator, curing system and reinforcing materials, the effects of the particle size and chemical composition of fly ash, the type, dosage and modulus of alkali activator, the heating curing time and initial curing temperature on the compressive strength, and the effect of fiber on the compressive strength and flexural performance of fly ash geopolymers were reviewed. Finally, based on the existing research results, how the four influencing factors affect the mechanical properties of fly ash geopolymers were summarized.

Key words: geopolymer, fly ash, alkali activator, curing environment, fiber, mechanical property

CLC Number:

TU526

PENG Yuqing, GUO Rongxin, LIN Zhiwei, ZHANG Min. Review on Influencing Factors of Mechanical Properties of Fly Ash Geopolymer[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(3): 858-866.

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