Analysis of a landfill cover without geomembrane using varied particle sizes of recycled concrete
文献类型：期刊论文
| 作者 | Ng, Charles Wang Wai1; Ng, Cheuk Lam1; Ni, Junjun4; Guo, Haowen1; Zhang, Qi1; Xue, Qiang2 ; Chen, Rui3
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| 刊名 | JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
 |
| 出版日期 | 2023-05-01 |
| 卷号 | 15期号:5页码:1263 |
| 关键词 | Capillary barrier Landfill cover Particle size Recycled concrete |
| ISSN号 | 1674-7755 |
| 英文摘要 | Previous studies have demonstrated the effectiveness of a novel three-layer landfill cover system constructed with recycled concrete aggregates (RCAs) without geomembrane in both laboratory and field. However, no systematic investigation has been carried out to optimize the combination of the particle sizes for fine-grained RCAs (FRC) and coarse-grained RCAs (CRC) that can be used for the three-layer landfill cover system. The aim of this paper is to assist engineers in designing the three-layer landfill cover system under a rainfall of 100-year return period in humid climate conditions using an easily controlled soil parameter D-10 of RCAs. The numerical study reveals that when D-10 of FRC increases from 0.05 mm to 0.16 mm, its saturated permeability increases by 10 times. As a result, a larger amount of rainwater infiltrates into the cover system, causing a higher lateral diversion in both the top FRC and middle CRC layers. No further changes in the lateral diversion are observed when the D-10 value of FRC is larger than 0.16 mm. Both the particle sizes of FRC and CRC layers are shown to have a minor influence on the percolation under the extreme rainfall event. This implies that the selection of particle sizes for the FRC and CRC layers can be based on the availability of materials. Although it is well known that the bottom layer of the cover system should be constructed with very fine-grained soils if possible, this study provides an upper limit to the particle size that can be used in the bottom layer (D-10 not larger than 0.02 mm). With this limit, the three-layer system can still minimize the water percolation to meet the design criterion (30 mm/yr) even under a 100-year return period of rainfall in humid climates. (c) 2023 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting by Elsevier B.V. This is an open access article under the CC BY license (http://creativecommons.org/licenses/ by/4.0/). |
| 学科主题 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001006040900014 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35401]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Department of Civil and Environmental Engineering, Hong Kong University of Science and Technology, Hong Kong, China 2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, 430071, China 3.Department of Civil and Environmental Engineering, Shenzhen Graduate School, Harbin Institute of Technology, Shenzhen, China 4.School of Transportation, Southeast University, Nanjing, China |
| 推荐引用方式 GB/T 7714 | Ng, Charles Wang Wai,Ng, Cheuk Lam,Ni, Junjun,et al. Analysis of a landfill cover without geomembrane using varied particle sizes of recycled concrete[J]. JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,2023,15(5):1263. |
| APA | Ng, Charles Wang Wai.,Ng, Cheuk Lam.,Ni, Junjun.,Guo, Haowen.,Zhang, Qi.,...&Chen, Rui.(2023).Analysis of a landfill cover without geomembrane using varied particle sizes of recycled concrete.JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING,15(5),1263. |
| MLA | Ng, Charles Wang Wai,et al."Analysis of a landfill cover without geomembrane using varied particle sizes of recycled concrete".JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING 15.5(2023):1263. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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