Mechanical Strength, Water Seepage and Microstructure of a Novel Landfill Solidified Sludge Liner Material
文献类型：期刊论文
| 作者 | Liu, Yajun; Lu, Haijun; Wang, Chaofeng; Liu, Ye; Ma, Jiayu; Liu, Mengyi |
| 刊名 | PROCESSES
 |
| 出版日期 | 2022-08-01 |
| 卷号 | 10期号:8 |
| 关键词 | solidified sludge landfill liner industrial solid waste water seepage microstructure |
| 英文摘要 | In order to prepare a novel landfill liner material, we used industrial calcium-containing waste (slag, fly ash, and desulfurized gypsum) to solidify municipal sludge. The mechanical and permeability properties of the solidified sludge material (SSM) were evaluated using straight shear, uniaxial compression, and permeability tests. The hydration products, microscopic morphology, and elemental composition of the SSM after the wet and dry cycles were analyzed using a combination of scanning electron microscopy (SEM + EDS), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FT-IR). The SSM has high strength and low hydraulic conductivity. The values of cohesion c and internal friction angle phi reached 0.45-3.31 MPa and 6.52-36.28 degrees. The SSM exhibited a compressive strength of 0.93-11.67 MPa and hydraulic conductivity of 4.80 x 10(-9) -1.34 x 10(-7) cm/s. Analysis shows that SiO2, Al2O3, and CaO in industrial calcium-containing solid wastes and sludges produce dense bulk and agglomerated C-S-H and C-A-S-H gels under alkali excitation. The optimum ratio of sludge, desulfurized gypsum, fly ash, and slag in the solidified sludge was 1:0.61:0.62:0.54, whereas the optimum exciter was Ca(OH)(2). The SSM may be used as a good barrier material to prevent water seepage in landfills. |
| 学科主题 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000845798200001 |
| 出版者 | MDPI |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/34799]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Wuhan Polytechnic University; 2.Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS |
| 推荐引用方式 GB/T 7714 | Liu, Yajun,Lu, Haijun,Wang, Chaofeng,et al. Mechanical Strength, Water Seepage and Microstructure of a Novel Landfill Solidified Sludge Liner Material[J]. PROCESSES,2022,10(8). |
| APA | Liu, Yajun,Lu, Haijun,Wang, Chaofeng,Liu, Ye,Ma, Jiayu,&Liu, Mengyi.(2022).Mechanical Strength, Water Seepage and Microstructure of a Novel Landfill Solidified Sludge Liner Material.PROCESSES,10(8). |
| MLA | Liu, Yajun,et al."Mechanical Strength, Water Seepage and Microstructure of a Novel Landfill Solidified Sludge Liner Material".PROCESSES 10.8(2022). |
入库方式： OAI收割
来源：武汉岩土力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。