2026-10-13T20:41:25Z https://www.scidb.cn/oai

10.57760/sciencedb.17232 2024-11-25T17:43:44Z

2024-11-25 Influence of crystal-transforming agent on the performance and mechanism of α-high-strength gypsum prepared from FGD gypsum doi:10.57760/sciencedb.17232 en This paper investigates the impact of flue gas desulfurization (FGD) gypsum's crystal modifier on the characteristics and microcosmic mechanism of α-high strength gypsum. The results demonstrate that all three crystal modifiers can convert FGD gypsum to α-high-strength gypsum. Citric acid (CA) has the most significant influence on α-high-strength gypsum, and the prepared α-high-strength gypsum is short columnar, with an aspect ratio in the range of 1–3, and has a faster setting time, a larger specific surface area, and a smaller standard consistency, higher compressive strength, greater surface hardness, and smaller crystal particle size. The initial setting time of the α-high-strength gypsum manufactured with CA crystal modifier was decreased by 36% compared to the blank sample, the final setting time was lowered by 37.5%, and the water consumption of the standard consistency was reduced by 8%. The maximum strength is 32 MPa after 2 h, the absolute dry compressive strength is up to 38 MPa, and the surface hardness is improved by 24.43%. Flue gas desulfurization gypsum; Crystal modifier; Microscopic mechanism; α-high-strength gypsum Zhuoyue Xu Xiao Wang Biao Jin Dawang Zhang Hui Li PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset http://www.doi.org/https://doi.org/10.1016/j.partic.2023.07.015 Science Data Bank