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- W4280493218 abstract "To improve the performance of coal mine cemented backfill materials and reduce the cost, biomass power plant ash (BPPA) is introduced to the preparation of coal gangue backfill materials, and the influence of BPPA on the fresh properties of cement coal gangue backfill (CCGB) is studied by using BPPA partially replaced cement and fly ash in the raw material. Slump and spread test, bleeding rate test, and setting time test were taken to evaluate fluidity, water retentivity, and setting time of CCGB at different substitution amounts (0, 10, 20, 30, and 40 wt%). At the same time, the Zeta potential tests, hydration heat tests, and water film thickness (WFT) theory is used to explain the results of the fresh properties tests. The replacement of cement and fly ash by BPPA improved fluidity and water retentivity of fresh CCGB while meeting the requirement of setting time; To ensure that CCGB has good fluidity and uniformity, it is recommended that the replacement rate should be greater than 10% when BPPA replaces cement, the replacement rate should not exceed 20% when BPPA replaces fly ash. The results show that BPPA can significantly improve the fresh properties of CCGB, which can be used for the preparation of cemented coal gangue backfill material. Meanwhile, the influence mechanism is explained, which has guiding significance for the application of BPPA cemented backfill material in engineering practice." @default.
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- W4280493218 date "2022-07-01" @default.
- W4280493218 modified "2023-09-24" @default.
- W4280493218 title "Effect of biomass power plant ash on fresh properties of cemented coal gangue backfill" @default.
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- W4280493218 doi "https://doi.org/10.1016/j.conbuildmat.2022.127853" @default.
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