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- W4319655305 abstract "The performance of fresh and hardened geopolymer pastes is significantly influenced by parameters, such as alkali admixture (A/F), activator modulus (Ms), and water–binder ratio (w/b). In this work, the effects of A/F, Ms, and w/b on the properties of fresh and hardened fly ash geopolymers (FAGs) are characterized using rheological, strength, and microstructural tests. The Bingham and Herschel–Bulkley (H–B) equations were utilized to match the rheological curve of the fresh FAG paste. Experimental results showed that the rheological behavior of the FAG paste conformed to the H–B model. However, the rheological model of the FAG paste did not change with variations in A/F, Ms, and w/b. In addition, A/F, Ms, and w/b regulated the geopolymerization and microstructure of the FAG. By decreasing Ms, increasing A/F, and adjusting w/b, the properties of the FAG paste effectively improved while maintaining strength. When Ms and A/F were 1.2 and 6%, the FAG setting time decreased by 94.5%; moreover, the fluidity and 28-d compressive strength increased by 11.7% and 31.3%, respectively, compared with those when Ms and A/F were 1.4 and 8%." @default.
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- W4319655305 date "2023-02-01" @default.
- W4319655305 modified "2023-10-13" @default.
- W4319655305 title "Workability, rheology, and geopolymerization of fly ash geopolymer: Role of alkali content, modulus, and water–binder ratio" @default.
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- W4319655305 doi "https://doi.org/10.1016/j.conbuildmat.2023.130357" @default.
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