Effect of hydration on mechanical properties and microstructure of expansive soil
文献类型：期刊论文
| 作者 | Chi, Ze-Cheng4,5; Dai, Zhang-Jun4; Chen, Shan-Xiong4; Li, Fan-Fan2; Wang, Wei1; Li, Jian-Bin3 |
| 刊名 | ENVIRONMENTAL EARTH SCIENCES
 |
| 出版日期 | 2023-03-01 |
| 卷号 | 82期号:6页码:- |
| ISSN号 | 1866-6280 |
| 关键词 | Expansive soil Anisotropic swelling pressure Hydration Microstructure Pore collapse |
| 英文摘要 | The hygroscopic swelling properties of expansive soils usually present significant challenges to engineered structures. Therefore, it is of great significance to study the effect of hydration on the mechanical properties and microstructure. The influence of different initial conditions on the swelling pressure was analyzed by the three-dimensional expansion test device, and the effect of hydration on the microstructure of expansive soil was studied by the MIP method. The results show that: the swelling pressure decreases with the increase of the initial moisture content and increases with the increase of the dry density. The average swelling pressure development rate increases with increasing dry density and decreases with increasing initial moisture content. The anisotropy coefficient range of soil is 0.525-0.904. Hydration causes the collapse of macropores between the aggregates, the increase in the number of intra-aggregate pores, and the gradual decrease in total volume, and the microscopic pore structure of the specimen tends to be uniform. The dominant values corresponding to the specimen with a dry density of 1.5 cm(3) changed from 50-60 nm to 20-30 nm, and 10,000-11,000 nm to 5000-6000 nm. The dominant values corresponding to the specimen with a dry density of 1.7 cm(3) also decreased slightly. Therefore, the smaller the dry density, the greater the effect of hydration on the microstructure of the internal pores of the specimen. |
| 学科主题 | Environmental Sciences & Ecology ; Geology ; Water Resources |
| 语种 | 英语 |
| 出版者 | SPRINGER |
| WOS记录号 | WOS:000943312700001 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/35431]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Guangdong Research Institute of Water Resources and Hydropower, Guangzhou 510610, China 2.Anhui Transport Consulting and Design Institute CO., LTD, Hefei 230088, China 3.School of Civil Engineering, Guangzhou University, Guangzhou 510006, China 4.State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan 430071, China 5.Key Laboratory of Geological Survey and Evaluation of Ministry of Education, China University of Geosciences, Wuhan 430074, China |
| 推荐引用方式 GB/T 7714 | Chi, Ze-Cheng,Dai, Zhang-Jun,Chen, Shan-Xiong,et al. Effect of hydration on mechanical properties and microstructure of expansive soil[J]. ENVIRONMENTAL EARTH SCIENCES,2023,82(6):-. |
| APA | Chi, Ze-Cheng,Dai, Zhang-Jun,Chen, Shan-Xiong,Li, Fan-Fan,Wang, Wei,&Li, Jian-Bin.(2023).Effect of hydration on mechanical properties and microstructure of expansive soil.ENVIRONMENTAL EARTH SCIENCES,82(6),-. |
| MLA | Chi, Ze-Cheng,et al."Effect of hydration on mechanical properties and microstructure of expansive soil".ENVIRONMENTAL EARTH SCIENCES 82.6(2023):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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