The Effect of Initial Water Content and Density on the Swelling-Shrinkage and Cracking Characteristics of Compacted Clay
文献类型：期刊论文
| 作者 | Zhong, Yuqing1,3; Cai, Guanghua1,3; Zeng, Gang2 |
| 刊名 | SEPARATIONS
 |
| 出版日期 | 2022-12-01 |
| 卷号 | 9期号:12页码:- |
| 关键词 | compacted clay wetting-drying cycle expansion and shrinkage law desiccation cracking microstructure |
| 英文摘要 | The swelling-shrinkage and cracking characteristics of compacted clay under the coupling effect of initial conditions are rarely studied. The dry-wet cycle test of compacted clay with varying initial water contents and densities was performed in this study; the size and cracking conditions were investigated. The results showed that when the initial moisture content was 21% and the dry density was 1.65 g/cm(3), the longitudinal expansion amount of the compacted clay was relatively small. However, it was rather large when the initial water content was 17% and 19%. Under the same dry density, the final vertical shrinkage ratio of the sample with a water content of 21% was the smallest, while that of the samples with a water content of 23% and 25% was rather big. Under the same water content, the final vertical shrinkage ratio decreased with the increase in dry density. After three wetting-drying cycles, compacted clay with a dry density of 1.65 g/cm(3) and an optimal initial water content of 21% produced the fewest cracks and had the lowest cracking factor (CF) (only 7.58%). The compacted clay specimens with the dry densities of 1.55 g/cm(3) and 1.60 g/cm(3) had rather significant cracking at the same initial moisture content of 21%. The mercury intrusion porosimetry (MIP) test demonstrated that in the first two dry and wet cycles, the distribution of large pores decreased and that of tiny pores increased. After the third cycle, the distribution of small and medium pores decreased slightly. The results of this study will provide theoretical guidance for selecting cover soils in landfills. |
| 学科主题 | Chemistry |
| 语种 | 英语 |
| WOS记录号 | WOS:000903087300001 |
| 出版者 | MDPI |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35093]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.College of Civil and Engineering, Nanjing Forestry University, Nanjing 210037, China 2.School of Civil Engineering and Architecture, Hubei University of Arts and Science, Xiangyang 441053, China 3.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China |
| 推荐引用方式 GB/T 7714 | Zhong, Yuqing,Cai, Guanghua,Zeng, Gang. The Effect of Initial Water Content and Density on the Swelling-Shrinkage and Cracking Characteristics of Compacted Clay[J]. SEPARATIONS,2022,9(12):-. |
| APA | Zhong, Yuqing,Cai, Guanghua,&Zeng, Gang.(2022).The Effect of Initial Water Content and Density on the Swelling-Shrinkage and Cracking Characteristics of Compacted Clay.SEPARATIONS,9(12),-. |
| MLA | Zhong, Yuqing,et al."The Effect of Initial Water Content and Density on the Swelling-Shrinkage and Cracking Characteristics of Compacted Clay".SEPARATIONS 9.12(2022):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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