Zhengrui Zhang and Siti Jahara Matlan and Hao Wang and Ahad Amini Pishro and Lili Zhang and Xian Gao and Zhao Liang and Xiaoyi Liu and Peigen Zhao (2022) Geotechnical evaluation of loess modifications as the sustainable compacted soil liner material in solid waste landfill. Materials, 15. pp. 1-17.
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Abstract
This paper studied the anti-seepage ability of the modified loess by using attapulgite, which is abundant in local areas. The possibility of using the modified loess as the sustainable compacted soil liner material in a solid waste landfill was also considered in this research. The materials were then evaluated using Nuclear Magnetic Resonance (NMR), Scanning Electron Microscopy (SEM), X-ray Diffraction (XRD), and an Impermeability Mechanism (IM). The experimental results showed that the permeability coefficient of the attapulgite-modified loess decreases significantly with increasing attapulgite content. However, it becomes less significant when the attapulgite level approaches 10%. Both cases can meet the landfill impermeability requirements, based on the attapulgite content remaining at 10%, adding 15% lime or 5% cement, respectively. The triaxial consolidation and drainage experiment was carried out to investigate the shear strength of the materials under three different working circumstances. The stress–strain curves of each specimen were produced, as were the cohesion and internal friction angle values. This research lays the groundwork for using attapulgite-modified loess as a landfill lining material. It establishes a solid platform for future studies on attapulgite adsorption and purifying performance in landfills.
| Item Type: | Article |
|---|---|
| Keyword: | Sustainable compacted soil liner, Loess modifications, Attapulgite-lime, Attapulgite-cement, Permeability coefficient, Nmr-sem-xrd, Shear strength, Lanzhou China |
| Subjects: | T Technology > T Technology (General) > T1-995 Technology (General) T Technology > TA Engineering (General). Civil engineering (General) > TA1-2040 Engineering (General). Civil engineering (General) |
| Department: | FACULTY > Faculty of Engineering |
| Depositing User: | SITI AZIZAH BINTI IDRIS - |
| Date Deposited: | 31 Dec 2024 11:21 |
| Last Modified: | 31 Dec 2024 11:21 |
| URI: | https://eprints.ums.edu.my/id/eprint/42502 |
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