Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Development, Performance, and Mechanism of Fluidized Solidified Soil Treated with Multi-Source Industrial Solid Waste Cementitious Materials
Insufficient utilization of industrial solid waste and the high carbon emissions caused by the use of cement in engineering construction are two challenges faced by China. This study aimed to develop a multi-source industrial solid waste cementitious material (MSWC) for fluidized solidified soil (FSS) in soil backfill projects. First, the response surface models for the unconfined compressive strength (UCS) of MSWC-FSS were established, and the optimal mixing ratio of MSWC was determined. Subsequently, laboratory tests were conducted to compare the differences in flow expansion, UCS, and dry shrinkage between MSWC and ordinary Portland cement (OPC) in FSS, and the feasibility of MSWC-FSS was verified through on-site tests. Finally, the curing mechanism of MSWC-FSS was analyzed by XRD and SEM. The results showed that MSWC had an optimal mix ratio: steel slag (SS): ground granulated blast-furnace slag (GGBS): circulating fluidized bed fly ash (CFBFA): flue gas desulfurization gypsum (FGDG): OPC = 20:40:15:5:20. MSWC-FSS had good flow expansion, and its UCS and drying shrinkage resistance were more than 10% better than OPC-FSS. The on-site test also proved the practicability and progressiveness of MSWC-FSS. According to the chemical composition and microstructure, MSWC-FSS generated more ettringite than OPC-FSS, making MSWC-FSS denser.
Development, Performance, and Mechanism of Fluidized Solidified Soil Treated with Multi-Source Industrial Solid Waste Cementitious Materials
Insufficient utilization of industrial solid waste and the high carbon emissions caused by the use of cement in engineering construction are two challenges faced by China. This study aimed to develop a multi-source industrial solid waste cementitious material (MSWC) for fluidized solidified soil (FSS) in soil backfill projects. First, the response surface models for the unconfined compressive strength (UCS) of MSWC-FSS were established, and the optimal mixing ratio of MSWC was determined. Subsequently, laboratory tests were conducted to compare the differences in flow expansion, UCS, and dry shrinkage between MSWC and ordinary Portland cement (OPC) in FSS, and the feasibility of MSWC-FSS was verified through on-site tests. Finally, the curing mechanism of MSWC-FSS was analyzed by XRD and SEM. The results showed that MSWC had an optimal mix ratio: steel slag (SS): ground granulated blast-furnace slag (GGBS): circulating fluidized bed fly ash (CFBFA): flue gas desulfurization gypsum (FGDG): OPC = 20:40:15:5:20. MSWC-FSS had good flow expansion, and its UCS and drying shrinkage resistance were more than 10% better than OPC-FSS. The on-site test also proved the practicability and progressiveness of MSWC-FSS. According to the chemical composition and microstructure, MSWC-FSS generated more ettringite than OPC-FSS, making MSWC-FSS denser.
Development, Performance, and Mechanism of Fluidized Solidified Soil Treated with Multi-Source Industrial Solid Waste Cementitious Materials
Xinzhuang Cui (Autor:in) / Huaming Meng (Autor:in) / Zhanghong Liu (Autor:in) / Hao Sun (Autor:in) / Xiaoning Zhang (Autor:in) / Qing Jin (Autor:in) / Lei Wang (Autor:in)
2025
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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