Performance activation and strength evolution mechanism of carbide slag on anhydrous phosphogypsum backfill material

Zhou, Xuhong; Zhao, Yonghui; Zhu, Haiyang; Zhou, Qishi

doi:10.1016/j.conbuildmat.2024.135503

Cited by 7 publications

(2 citation statements)

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“…Xuhong Zhou also investigated the mechanism by which calcium carbide slag stimulates anhydrous PG filling materials [67]. When no calcium carbide slag is added, the hydration and hardening process of anhydrous the PG filling material is extremely slow, as shown in Figure 10a; when gypsum comes into contact with water, some of the gypsum and water molecules form amorphous semi-aqueous gypsum over time.…”

Section: Filling Materialsmentioning

confidence: 99%

“…Finally, the gradual increase in the alkalinity promoted the gradual depolymerization of the vitreous reticulation in FA to form [AlO4] 5− and [SiO4] 4− , as well as polymerization with Ca 2+ , OH -, and SO4 2− to form abundant C-S(A)-H gels and e ringite, as shown in Figure 9. Xuhong Zhou also investigated the mechanism by which calcium carbide slag stimulates anhydrous PG filling materials [67]. When no calcium carbide slag is added, the hydration and hardening process of anhydrous the PG filling material is extremely slow, as shown in Figure 10a; when gypsum comes into contact with water, some of the gypsum and water molecules form amorphous semi-aqueous gypsum over time.…”

Section: Filling Materialsmentioning

confidence: 99%

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Application of the Industrial Byproduct Gypsum in Building Materials: A Review

Xie,

Liu,

Zhang

et al. 2024

Materials

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The industrial byproduct gypsum is a general term for byproducts discharged from industrial production with calcium sulfate as the main ingredient. Due to the high number of impurities and production volume, the industrial byproduct gypsum is underutilized, leading to serious environmental problems. At present, only desulfurization gypsum and phosphogypsum have been partially utilized in cementitious materials, cement retarders, etc., while the prospects for the utilization of other byproduct gypsums remain worrying. This paper mainly focuses on the sources and physicochemical properties of various types of gypsum byproducts and summarizes the application scenarios of various gypsums in construction materials. Finally, some suggestions are proposed to solve the problem of the industrial byproduct gypsum. This review is informative for solving the environmental problems caused by gypsum accumulation.

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Section: Filling Materialsmentioning

confidence: 99%

Section: Filling Materialsmentioning

confidence: 99%