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Experimental Research on the Properties and Formulation of Fly Ash Based Geopolymer Grouting Material

Zeng, Qingwei ; Gao, Peiwei ; Li, Kuan ; Dong, Guoqing ; Jin, Guanglai ; Sun, Xuewei ; Zhao, Jingwei ; Chen, Lifeng

Buildings (Basel), 2022-05, Vol.12 (5), p.503 [Periódico revisado por pares]

Basel: MDPI AG

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Título:
Experimental Research on the Properties and Formulation of Fly Ash Based Geopolymer Grouting Material
Autor: Zeng, Qingwei ; Gao, Peiwei ; Li, Kuan ; Dong, Guoqing ; Jin, Guanglai ; Sun, Xuewei ; Zhao, Jingwei ; Chen, Lifeng
Assuntos: Blast furnace slags ; Caustic soda ; Cement ; Compressive strength ; Drying ; Experimental research ; Fly ash ; geopolymer ; Geopolymers ; granulated blast furnace slag ; Granulation ; Grouting ; Heat resistance ; Mechanical properties ; Mercury ; microstructure ; Performance tests ; Pore size ; Pore size distribution ; Porosity ; Rheology ; Scanning electron microscopy ; Shrinkage ; Silica ; Size distribution ; Slag ; Sodium ; sodium silicate modulus ; Sodium silicates ; Test methods ; X-ray diffraction ; X-ray spectroscopy
É parte de: Buildings (Basel), 2022-05, Vol.12 (5), p.503
Descrição: This paper experimentally investigated the effects of varying contents of Na2O in a modified sodium silicate, sodium silicate moduli (Ms), and contents of granulated blast furnace slag (GBFS) on the compressive strength and drying shrinkage of fly ash (FA)-based geopolymer grouting materials at different ages. X-ray diffraction (XRD), mercury intrusion porosimetry (MIP), and scanning electron microscopy–energy dispersive X-ray spectroscopy (SEM–EDS) were used to study the influences of different amounts of GBFS on the microstructure and product compositions of FA-based geopolymer grouting materials. The results show that the content of Na2O in modified sodium silicate, Ms, and the content of GBFS play a significant role in compressive strength and drying shrinkage of FA-based geopolymer grouting materials. In addition, the influence of Ms as well as the content of GBFS on the compressive strength and drying shrinkage of FA-based geopolymer grouting materials was deeply affected by curing age. The micro-performance tests and analysis clearly showed that incorporating 30 wt% GBFS can decrease the proportion of pores with large pore sizes, improve pore size distribution, and enhance the solubility of FA and further promote the formation of C-A-S-H gel within FA-based geopolymer grouting materials.
Editor: Basel: MDPI AG
Idioma: Inglês

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Experimental Research on the Properties and Formulation of Fly Ash Based Geopolymer Grouting Material

Zeng, Qingwei ; Gao, Peiwei ; Li, Kuan ; Dong, Guoqing ; Jin, Guanglai ; Sun, Xuewei ; Zhao, Jingwei ; Chen, Lifeng

Basel: MDPI AG

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