Influence of drying-wetting cycles on soil-water characteristic curve of undisturbed granite residual soils and microstructure mechanism by nuclear magnetic resonance (NMR) spin-spin relaxation time (T-2) relaxometry
文献类型：期刊论文
| 作者 | Kong, Lingwei2; Sayem, Hossain Md.1,2; Tian, Huihui2 |
| 刊名 | CANADIAN GEOTECHNICAL JOURNAL
 |
| 出版日期 | 2018 |
| 卷号 | 55期号:2页码:208-216 |
| 关键词 | granite residual soil drying-wetting cycles soil-water characteristic curve (SWCC) nuclear magnetic resonance (NMR) pore-size distribution (POSD) |
| ISSN号 | 0008-3674 |
| DOI | 10.1139/cgj-2016-0614 |
| 英文摘要 | Due to the formational environment and climatic variability, granite residual soils with grain-size distribution ranging from gravel to clay undergo multiple drying-wetting cycles. The influences of multiple drying-wetting cycles on the soil-water characteristic curve (SWCC) and pore-size distribution (POSD) of undisturbed granite residual soils are investigated using the pressure plate test and nuclear magnetic resonance (NMR) spin-spin relaxation time (T-2) distribution measurement, respectively. Results show that the water-retention capacity and air-entry value decrease and pores become more uniform with increasing drying-wetting cycles. After four drying-wetting cycles, the soil reaches a nearly constant state. The POSD change of multiple drying-wetting cycle samples is consistent with the SWCC of the soils. Furthermore, a modified van Genuchten model in terms of cumulative pore volume is used to obtain the best-fit POSD of the drying-wetting cycle samples. The shape and changing tendency of both curves of SWCC and POSD are quite similar and achieved a better correlation. It can be concluded that the SWCC is strongly dependent on the POSD of the soil and NMR T-2 relaxometry can be used as an alternative to the assessment of microstructural variation of residual soils subjected to the periodic drying and wetting process. |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000423748300005 |
| 出版者 | CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/4208]  |
| 专题 | 岩土力学所知识全产出_期刊论文 国家重点实验室知识产出_期刊论文 |
| 作者单位 | 1.Jahangirnagar Univ, Dept Geol Sci 2.Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Inst Rock & Soil Mech ; |
| 推荐引用方式 GB/T 7714 | Kong, Lingwei,Sayem, Hossain Md.,Tian, Huihui. Influence of drying-wetting cycles on soil-water characteristic curve of undisturbed granite residual soils and microstructure mechanism by nuclear magnetic resonance (NMR) spin-spin relaxation time (T-2) relaxometry[J]. CANADIAN GEOTECHNICAL JOURNAL,2018,55(2):208-216. |
| APA | Kong, Lingwei,Sayem, Hossain Md.,&Tian, Huihui.(2018).Influence of drying-wetting cycles on soil-water characteristic curve of undisturbed granite residual soils and microstructure mechanism by nuclear magnetic resonance (NMR) spin-spin relaxation time (T-2) relaxometry.CANADIAN GEOTECHNICAL JOURNAL,55(2),208-216. |
| MLA | Kong, Lingwei,et al."Influence of drying-wetting cycles on soil-water characteristic curve of undisturbed granite residual soils and microstructure mechanism by nuclear magnetic resonance (NMR) spin-spin relaxation time (T-2) relaxometry".CANADIAN GEOTECHNICAL JOURNAL 55.2(2018):208-216. |
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。