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- W4322631824 abstract "In this paper, the influence of calcium on coal gangue and fly ash geopolymer is explored, and the problem of low utilization of unburned coal gangue is analyzed and solved. The experiment took uncalcined coal gangue and fly ash as raw materials, and a regression model was developed with the response surface methodology. The independent variables were the CG content, alkali activator concentration, and Ca(OH)2 to NaOH ratio (CH/SH). The response target value was the coal gangue and fly-ash geopolymer compressive strength. The compressive strength tests and the regression model obtained by the response surface methodology showed that the coal gangue and fly ash geopolymer prepared with the content of uncalcined coal gangue is 30%, alkali activator content of 15%, and the value of CH/SH is 1.727 had a dense structure and better performance. The microscopic results demonstrated that the uncalcined coal gangue structure is destroyed under an alkali activator's action, and a dense microstructure is formed based on C(N)-A-S-H and C-S-H gel, which provides a reasonable basis for the preparation of geopolymers from the uncalcined coal gangue." @default.
- W4322631824 created "2023-03-01" @default.
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- W4322631824 date "2023-02-28" @default.
- W4322631824 modified "2023-09-30" @default.
- W4322631824 title "Investigation on the Effect of Calcium on the Properties of Geopolymer Prepared from Uncalcined Coal Gangue" @default.
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- W4322631824 doi "https://doi.org/10.3390/polym15051241" @default.
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