Solidified lake sediment with industrial waste and construction waste used as barrier cover material: mechanical strength, water resistance performance, and microscopic analysis
文献类型：期刊论文
| 作者 | Yuan, Jiayue3; Guo, Lin1; Chen, Shiyu3; Liu, Ye2,3; Feng, Yuan3; Lu, Haijun2,3 |
| 刊名 | ENVIRONMENTAL TECHNOLOGY
 |
| 出版日期 | 2025-01-22 |
| 页码 | 17 |
| 关键词 | Solidified sediment Industrial waste residue Cover system Permeation characteristic Microstructure |
| ISSN号 | 0959-3330 |
| DOI | 10.1080/09593330.2025.2453948 |
| 英文摘要 | This study introduces a novel landfill cover material, employing lake sediment as a substrate, stabilised with fly ash, slag, desulfurisation gypsum and construction waste. The mechanical properties, including shear strength parameters, unconfined compressive strength, hydraulic conductivity, volumetric shrinkage, and water content, of the solidified sludge were evaluated. The microscopic mechanism of the solidified sludge were investigated through XRD, FTIR, and SEM-EDS techniques. A novel three-layer composite capping cover system for landfills is proposed, comprising an upper capillary barrier layer, a middle drainage layer and a bottom impermeable layer . Indoor rainfall simulation tests were conducted to assess the water retention performance of this capping cover system under repeated moderate, heavy, and torrential rainfall events. The early strength of the solidified sludge exhibited rapid development, with cohesion and internal friction angle reaching 382.56 kPa and 57.67 degrees, respectively, after 3 days. After 28d, the unconfined compressive strength ranged from 6.93 to 14.29 MPa, with hydraulic conductivity between 3.98-23.1 x 10-8cm/s. The hydration reactions of the industrial waste residues resulted in the formation of Ettringite, Gypsum, and hydrous calcium (aluminum) silicates. The Ettringite and Gypsum crystals formed an internal support framework, while the generation of gel-like substances such as C-S-H and C-A-S-H facilitated product aggregation. The RSM was employed to optimise the material ratio of the solidified sludge, while the Pearson coefficient facilitated correlation analysis. This study provides valuable data for designing landfill solidified sludge cover systems and offers a new approach for the co-disposal of sludge and industrial waste. |
| 资助项目 | Natural Science Foundation of Hubei Province[2022CFA011] ; Natural Science Foundation of Hubei Province[2023AFD214] ; Natural Science Foundation of Hubei Province of China |
| WOS研究方向 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:001407033300001 |
| 出版者 | TAYLOR & FRANCIS LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/37480]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Lu, Haijun |
| 作者单位 | 1.Cent & Southern China Municipal Engn Design & Res, Wuhan, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan, Peoples R China 3.Wuhan Polytech Univ, Sch Civil Engn & Architecture, Wuhan, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yuan, Jiayue,Guo, Lin,Chen, Shiyu,et al. Solidified lake sediment with industrial waste and construction waste used as barrier cover material: mechanical strength, water resistance performance, and microscopic analysis[J]. ENVIRONMENTAL TECHNOLOGY,2025:17. |
| APA | Yuan, Jiayue,Guo, Lin,Chen, Shiyu,Liu, Ye,Feng, Yuan,&Lu, Haijun.(2025).Solidified lake sediment with industrial waste and construction waste used as barrier cover material: mechanical strength, water resistance performance, and microscopic analysis.ENVIRONMENTAL TECHNOLOGY,17. |
| MLA | Yuan, Jiayue,et al."Solidified lake sediment with industrial waste and construction waste used as barrier cover material: mechanical strength, water resistance performance, and microscopic analysis".ENVIRONMENTAL TECHNOLOGY (2025):17. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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