Quantitative characterization of drying-induced cracks and permeability of granite residual soil using micron-sized X-ray computed tomography
文献类型：期刊论文
| 作者 | An, Ran1,2; Wang, Yixian1; Zhang, Xianwei2; Chen, Chang3; Liu, Xinyu2; Cai, Sutong3 |
| 刊名 | SCIENCE OF THE TOTAL ENVIRONMENT
 |
| 出版日期 | 2023-06-10 |
| 卷号 | 876期号:-页码:- |
| ISSN号 | 0048-9697 |
| 关键词 | Desiccation Granite residual soil Cracks Permeability Micron-sized X-ray computed tomography |
| 英文摘要 | Drying-induced cracks negatively impacts the performance of soils in the context of global warming. Traditional test-ing approaches used for the cracking characterization of soils are mainly based on surface observation and qualitative inspections. In this study, a temporal investigation of micron-sized X-ray computed tomography (Micro-CT) tests was performed on the granite residual soil (GRS) during desiccation for the first time. Through three-dimensional (3D) re-constructions and seepage simulations, the dynamic evolution of drying-induced cracks and permeability that evolved (0 to 120 h) was visually characterized and intensively quantified. Experimental results show that the averaged area -porosity ratio varies as an increasing trend, appearing fast at first and slowly thereafter during desiccation.. Observed by 3D reconstruction models, connected cracks rapidly propagated through the samples while isolated cracks occupied small volumes and remained almost unchanged. The pore-diameter distribution of GRS reveals that the propagation of connected cracks is essential in influencing soil cracking. The simulated permeability is generally comparable with measuring ones with an acceptable error margin, demonstrating the accuracy of seepage models. The increasing per-meability from both experiments and numerical simulations indicates the desiccation process severely impacts the hy-draulic properties of soils. This study provides an adamant evidence that the Micro-CT is an effective and feasible tool for the elucidation of drying-induced crack evolutions and in building numerical models for permeability validation. |
| 学科主题 | Environmental Sciences & Ecology |
| 语种 | 英语 |
| 出版者 | ELSEVIER |
| WOS记录号 | WOS:000974940600001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35121]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.School of Civil and Hydraulic Engineering, Hefei University of Technology, Hefei 230009, China 2.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, China 3.College of Urban Construction, Wuhan University of Science and Technology, Wuhan 430065, China |
| 推荐引用方式 GB/T 7714 | An, Ran,Wang, Yixian,Zhang, Xianwei,et al. Quantitative characterization of drying-induced cracks and permeability of granite residual soil using micron-sized X-ray computed tomography[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2023,876(-):-. |
| APA | An, Ran,Wang, Yixian,Zhang, Xianwei,Chen, Chang,Liu, Xinyu,&Cai, Sutong.(2023).Quantitative characterization of drying-induced cracks and permeability of granite residual soil using micron-sized X-ray computed tomography.SCIENCE OF THE TOTAL ENVIRONMENT,876(-),-. |
| MLA | An, Ran,et al."Quantitative characterization of drying-induced cracks and permeability of granite residual soil using micron-sized X-ray computed tomography".SCIENCE OF THE TOTAL ENVIRONMENT 876.-(2023):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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