High-Performance Geopolymers with Municipal Solid Waste Incineration Fly Ash: Influence on the Mechanical and Environmental Properties

被引:1
作者
Lin, Xiaochen [1 ]
Zhang, Dapeng [1 ]
Zhao, Zehua [1 ]
Zhang, Cheng [1 ]
Ma, Bing [1 ]
Zhou, Hao [1 ]
Wang, Yi [1 ]
Xue, Dingming [1 ]
Tang, Jing [1 ]
Chen, Chen [2 ]
Li, Jing [3 ]
Sun, Zengqing [4 ]
Zhang, Houhu [1 ]
Li, Weixin [1 ]
机构
[1] Minist Ecol & Environm Peoples Republ China, Nanjing Inst Environm Sci NIES, Nanjing 210042, Peoples R China
[2] Nanjing Forestry Univ, Coll Informat Sci & Technol & Artificial Intellige, Nanjing 210037, Peoples R China
[3] Nanjing Res Inst Environm Protect, Nanjing 210013, Peoples R China
[4] Cent South Univ, Sch Minerals Proc & Bioengn, Changsha 410083, Peoples R China
基金
国家重点研发计划;
关键词
geopolymer; MSWI FA; leaching; HEAVY-METAL IMMOBILIZATION; CEMENTS; TECHNOLOGIES; METAKAOLIN; MANAGEMENT; PROGRESS; ENERGY; RAW;
D O I
10.3390/buildings14113518
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
Geopolymer is a sustainable low-carbon cementitious material that is able to incorporate large amounts of solid waste as precursors or activators. As the proportion of municipal solid waste incineration continues to rise in China, the large-scale generation of municipal solid waste incineration fly ash (MSWI FA) has emerged as a significant challenge. The production of geopolymers represents a potential pathway for the comprehensive utilization of MSWI FA. However, most studies have reported that geopolymers containing MSWI FA exhibit low strength, which diminishes their economic value. Furthermore, the unclear environmental risks associated with MSWI FA-based geopolymers have impeded their broader application. This study explores the use of MSWI FA as a substitute for ground granulated blast furnace slag (GGBS) or coal fly ash (CFA) in the production of high-performance geopolymers, achieving compressive strengths exceeding 60 MPa, even when the MSWI FA content reaches 50%. A synergistic effect is observed between MSWI FA and CFA, which enhances the reactivity of CFA. With reasonable formulation, the environmental risks of geopolymers containing MSWI FA are manageable in normal rainfall scenarios. However, there remains a potential risk of soil and groundwater contamination under extreme conditions, such as acid rain.
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页数:23
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