Shear strength, water permeability and microstructure of modified municipal sludge based on industrial solid waste containing calcium used as landfill cover materials
文献类型：期刊论文
| 作者 | Liu, Mengyi2,3; Lu, Haijun2,3; Deng, Qingkai2; Ji, Shuang2; Qin, Linbo1; Wan, Yong3 |
| 刊名 | WASTE MANAGEMENT
 |
| 出版日期 | 2022-05-15 |
| 卷号 | 145期号:-页码:20 |
| 关键词 | Modified municipal sludge Industrial solid waste Landfill cover Water permeability Microstructure |
| ISSN号 | 0956-053X |
| 英文摘要 | In order to prepare a new type of landfill covering material for closure, we used industrial calcium-containing waste (slag, desulfurised gypsum and fly ash) to modify the municipal dewatered sludge. Shear, infiltration and rainfall infiltration model tests were performed to obtain the shear strength parameters of the modified sludge, the hydraulic conductivity during the wet-dry cycle, and the service performance against rainfall breakdown to evaluate the service performance of the modified sludge cover (MSC). Comprehensive characterisation of the modified sludge was analysed by XRD, FTIR and SEM-EDS to revealed the mineral structure, microstructure, and modification mechanism of the sludge. The MSC samples had high shear strength and shown the characteristics of evolving from plasticity to brittleness. After curing for 14 d, the values of cohesion c and internal friction angle phi reached 150.75-384.69 kPa and 37.60-57.29 degrees , respectively. The MSC exhibited excellent anti-seepage service performance under dry and wet cycle conditions. Compared with traditional compacted clay, its hydraulic conductivity dropped by an order of magnitude, and after six wet and dry cycles, the hydraulic conductivity of the modified sludge reached stability at 1.4-7.2 x 10(-7) cm/s. The 60-cm-thick MSC layer can completely withstand the impact of long-term rainfall during the rainy season in the middle reaches of the Yangtze River in China. Analysis results also show that the modification mechanism of the sludge could be ascribed to the generation of dense blocks and clusters of C-S-H and C-A-S-H gels originated from SiO2 , Al2O3 , and CaO phases in industrial calcium-containing waste and sludge by the activation of the alkali. |
| 学科主题 | Engineering ; Environmental Sciences & Ecology |
| 语种 | 英语 |
| WOS记录号 | WOS:000799589800003 |
| 出版者 | PERGAMON-ELSEVIER SCIENCE LTD |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35235]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.College of Resources and Environment Engineering, Wuhan University of Science and Technology, Wuhan 430081, China 2.School of Civil Engineering and Architecture, Wuhan Polytechnic University, Wuhan 430023, China 3.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China |
| 推荐引用方式 GB/T 7714 | Liu, Mengyi,Lu, Haijun,Deng, Qingkai,et al. Shear strength, water permeability and microstructure of modified municipal sludge based on industrial solid waste containing calcium used as landfill cover materials[J]. WASTE MANAGEMENT,2022,145(-):20. |
| APA | Liu, Mengyi,Lu, Haijun,Deng, Qingkai,Ji, Shuang,Qin, Linbo,&Wan, Yong.(2022).Shear strength, water permeability and microstructure of modified municipal sludge based on industrial solid waste containing calcium used as landfill cover materials.WASTE MANAGEMENT,145(-),20. |
| MLA | Liu, Mengyi,et al."Shear strength, water permeability and microstructure of modified municipal sludge based on industrial solid waste containing calcium used as landfill cover materials".WASTE MANAGEMENT 145.-(2022):20. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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