Evolution of solidified municipal sludge used as landfill cover material under wet-dry cycles: mechanical characteristics, microstructural, and seepage properties
文献类型：期刊论文
| 作者 | Liu, Yajun1,2; Lu, Haijun1,2; Liu, Mengyi1,2; Dong, Yiqie1 |
| 刊名 | ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY
 |
| 出版日期 | 2024-11-11 |
| 页码 | 16 |
| 关键词 | Solidified sludge Industrial wastes Compressive strength Microstructure Rainfall modeling |
| ISSN号 | 1387-585X |
| DOI | 10.1007/s10668-024-05653-8 |
| 英文摘要 | This paper utilizes industrial wastes, including slag powder, desulfurized gypsum, fly ash, and construction waste, to solidify municipal sludge and develop a new type of landfill cover material. To investigate the durability of solidified sludge under wet-dry cycles, this study systematically analyzes its mechanical properties-such as volume shrinkage rate, unconfined compressive strength, and permeability coefficient-along with microstructural characteristics like pore structure, micro-morphology, and hydration products. In addition, the impermeability of the solidified sludge cover under varying rainfall conditions was assessed using rainfall simulation tests. After 20 wet-dry cycles, the solidified sludge samples exhibited volume shrinkage between 0.56% and 0.85%, unconfined compressive strength from 1.31 to 4.55 MPa, and permeability coefficients ranging from 9.51 x 10- 8 to 5.68 x 10- 7 cm/s. Portions of the gelatinous hydration products in the solidified sludge experienced discrete damage, leading to an increase in microporous volume. However, the overall structural integrity of the solidified sludge was maintained. The 3-layer landfill cover system was constructed using engineering soil, coarse construction waste aggregate, and solidified sludge and resisted strong precipitation. The 40 cm thick solidified sludge acted as an impermeable layer and yielded a good water-blocking effect. This study provides data support the application and technical advancement of solidified sludge as a landfill cover material. |
| 资助项目 | National Natural Science Foundation of China[U20A20320] ; National Natural Science Foundation of China[2022CFA011] ; Natural Science Foundation of Hubei Province of China |
| WOS研究方向 | Science & Technology - Other Topics ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001352547100001 |
| 出版者 | SPRINGER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/43150]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Lu, Haijun |
| 作者单位 | 1.Wuhan Polytech Univ, Sch Civil Engn & Architecture, Wuhan 430023, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Yajun,Lu, Haijun,Liu, Mengyi,et al. Evolution of solidified municipal sludge used as landfill cover material under wet-dry cycles: mechanical characteristics, microstructural, and seepage properties[J]. ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY,2024:16. |
| APA | Liu, Yajun,Lu, Haijun,Liu, Mengyi,&Dong, Yiqie.(2024).Evolution of solidified municipal sludge used as landfill cover material under wet-dry cycles: mechanical characteristics, microstructural, and seepage properties.ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY,16. |
| MLA | Liu, Yajun,et al."Evolution of solidified municipal sludge used as landfill cover material under wet-dry cycles: mechanical characteristics, microstructural, and seepage properties".ENVIRONMENT DEVELOPMENT AND SUSTAINABILITY (2024):16. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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