Experimental Investigation on the Influence of Thermochemical Effect on the Pore-Water Status in Expansive Soil
文献类型：期刊论文
| 作者 | Yao, Chuanqin1,2,3; Wei, Changfu2,4; Ma, Tiantian2; Chen, Pan2; Tian, Huihui2 |
| 刊名 | INTERNATIONAL JOURNAL OF GEOMECHANICS
 |
| 出版日期 | 2021-06-01 |
| 卷号 | 21期号:6页码:11 |
| 关键词 | Expansive soil Pore-water status Temperature Saline solution Nuclear magnetic resonance (NMR) |
| ISSN号 | 1532-3641 |
| DOI | 10.1061/(ASCE)GM.1943-5622.0002020 |
| 英文摘要 | The pore-water status, including adsorptive and capillary water, in expansive clay with different dry densities was investigated under the effect of temperature and saline solution via the nuclear magnetic resonance technique. Combined with a method of distinguishing the adsorptive and capillary water, the variations in the adsorptive water content with the thermochemical effect were obtained quantitatively. The experimental results show that the adsorptive water content decreases as the temperature increases, consistent with the theoretical conclusion, which is considered to be attributed to the increase of the chemical potential and the activity of the pore water. On the other hand, the volume of micropores decreases while the volume of macropores increases with the increasing temperature or concentration, resulting from the flocculation and agglomeration of soil particles. Meanwhile, the increase of salt concentration can suppress the electric double layer and decrease the micropore volume, resulting in a decrease in the adsorptive water content. In addition, due to ion hydration, the relaxation of water molecules accelerates, shifting the water distribution curves of soil leftward as concentration increases. This effect overshadows the suppression of electric double layers and the decrease of the micropores, rendering higher adsorptive water content. The microstructure and the pore size distribution, obtained by the scanning electron microscope and mercury intrusion porosimetry experiments, were used to validate the variation of the adsorptive and capillary water in the pores. |
| 资助项目 | National Key Research & Development Program of China[2019YFC1509800] ; National Natural Science Foundation of China[41972290] ; National Natural Science Foundation of China[51939011] ; National Natural Science Foundation of China[51639008] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000672403800016 |
| 出版者 | ASCE-AMER SOC CIVIL ENGINEERS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/27292]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Ma, Tiantian |
| 作者单位 | 1.Shanghai Normal Univ, Sch Civil Engn, Shanghai 201418, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, 2 Xiaohongshan, Wuhan 430071, Hubei, Peoples R China 3.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 4.Guilin Univ Technol, Coll Civil & Architectural Engn, Guilin 541004, Guangxi, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yao, Chuanqin,Wei, Changfu,Ma, Tiantian,et al. Experimental Investigation on the Influence of Thermochemical Effect on the Pore-Water Status in Expansive Soil[J]. INTERNATIONAL JOURNAL OF GEOMECHANICS,2021,21(6):11. |
| APA | Yao, Chuanqin,Wei, Changfu,Ma, Tiantian,Chen, Pan,&Tian, Huihui.(2021).Experimental Investigation on the Influence of Thermochemical Effect on the Pore-Water Status in Expansive Soil.INTERNATIONAL JOURNAL OF GEOMECHANICS,21(6),11. |
| MLA | Yao, Chuanqin,et al."Experimental Investigation on the Influence of Thermochemical Effect on the Pore-Water Status in Expansive Soil".INTERNATIONAL JOURNAL OF GEOMECHANICS 21.6(2021):11. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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