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Study on the Early Performance and Mechanism of High-Fluidity Slag and Desulfurization Gypsum Alkali-Activated Filling Material Under Seawater Mixing
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Xinwei LIU1, Jiaolong REN2, Hongbo ZHAO2
Mining Research and Development | 2025, 45(4) : 70 - 77
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Mining Research and Development | 2025, 45(4): 70-77
Study on the Early Performance and Mechanism of High-Fluidity Slag and Desulfurization Gypsum Alkali-Activated Filling Material Under Seawater Mixing
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Xinwei LIU1, Jiaolong REN2, Hongbo ZHAO2
Affiliations
  • 1.College of Architectural Engineering, Shanxi Vocational University of Engineering Science and Technology, Jinzhong, Shanxi 030619, China
  • 2.School of Civil Engineering and Geomatics, Shandong University of Technology, Zibo, Shandong 255000, China
Published: 2025-04-25
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Taking high-fluidity slag and desulfurization gypsum alkali-activated filling material (HSD - AAM) as the research object, the influence of seawater mass concentration on its setting time, flowability and strength was analyzed. Furthermore, the early hydration mechanism of HSD - AAM was revealed through SEM, XRD and TG - DSC tests.The results show that with the increase of seawater mass concentration, the setting time of HSD - AAM shortened, the flowability decreased, and the flexural and compressive strength increased. Compared with the mixing conditions of pure water, when mixed with seawater of 100% mass concentration, the flow time of HSD - AAM is decreased by about 12%, the initial and final setting time are shortened by about 28% and 27%, the flexural strength and compressive strength are increased by about 18% and 19% respectively after curing for 1 day, and the flexural strength and compressive strength are increased by about 27% and 17% respectively after curing for 7 days. Seawater can accelerate the hydration process of C−(A)−S−H, AFt and Friedel salt, alkali activator can accelerate the hydration reaction between precursor and chloride ion, thus improving the early strength of HSD - AAM.

Seawater mixing  /  High-fluidity slag and desulfurization gypsum alkali-activated filling material (HSD - AAM)  /  Mechanical property  /  Hydration product  /  Microstructure
刘新伟, 任皎龙, 赵洪波. 海水拌合下高流态矿渣－脱硫石膏碱激发充填材料早期性能与水化机理研究. 矿业研究与开发, 2025 , 45 (4) : 70 -77 .
Xinwei LIU, Jiaolong REN, Hongbo ZHAO. Study on the Early Performance and Mechanism of High-Fluidity Slag and Desulfurization Gypsum Alkali-Activated Filling Material Under Seawater Mixing[J]. Mining Research and Development, 2025 , 45 (4) : 70 -77 .
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Year 2025 volume 45 Issue 4
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  • Receive Date：2024-12-18
  • Online Date：2026-10-30
  • Published：2025-04-25
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  • Received：2024-12-18
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Affiliations
    1.College of Architectural Engineering, Shanxi Vocational University of Engineering Science and Technology, Jinzhong, Shanxi 030619, China
    2.School of Civil Engineering and Geomatics, Shandong University of Technology, Zibo, Shandong 255000, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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