Experimental study of the dehydration-shrinkage characteristics of red-bedded mudstone in Central Sichuan under different humidity gradients
文献类型：期刊论文
| 作者 | Yu, Fei1; Cao, Yong1,2; Geng, Yun3; Yang, Qizhi3; Wang, Jiangchen3; Dai, Zhangjun1 |
| 刊名 | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
 |
| 出版日期 | 2024-04-01 |
| 卷号 | 83期号:4页码:16 |
| 关键词 | Red-bedded mudstone Gaseous moisture absorption Dehydration Shrinkage Relative humidity |
| ISSN号 | 1435-9529 |
| DOI | 10.1007/s10064-024-03614-z |
| 英文摘要 | To study the problem of long-term uplift of high-speed railway subgrade in a red mudstone area, dehydration shrinkage under different relative humidity gradients was tested. The combined analysis of mineral composition and micro-fissure structure was made to assess the influences of the humidity gradient on the dehydration-shrinkage characteristics and residual deformation of mudstone. Compared with the process of gas moisture absorption-expansion, the range of humidity gradient in which irreversible residual deformation occurs significantly was determined. The results show that the dehydration-shrinkage characteristic of mudstone is time-dependent, but the dehydration process lags the shrinkage process; the dehydration rate and shrinkage rate increase with the increase of humidity gradient. Unlike the gas moisture absorption-expansion, the rate of moisture migration is higher in the dehydration process, and the shrinkage rate is much higher than the expansion rate. This sharp shrinkage is more likely to lead to residual deformation of mudstone. The larger the humidity gradient experienced by the absorption-dehydration cycle, the stronger the water-holding capacity of mudstone, indicating that the change of humidity has an irreversible effect on the structure of mudstone. The measured humidity range of irreversible residual deformation of mudstone is RH85% to RH99%. It is under the action of repeated changes in environmental humidity that the continuous accumulation of irreversible residual deformation causes the slow uplift of mudstone subgrade. The results provide a new perspective for revealing the internal mechanism of long-term uplifting of red mudstone in central Sichuan, China. |
| 资助项目 | National Natural Science Foundation of China |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001187648100003 |
| 出版者 | SPRINGER HEIDELBERG |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/40974]  |
| 专题 | 中科院武汉岩土力学所 |
| 通讯作者 | Cao, Yong |
| 作者单位 | 1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Wuhan Branch China Railway Major Bridge Reconnaiss, Wuhan 430074, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Fei,Cao, Yong,Geng, Yun,et al. Experimental study of the dehydration-shrinkage characteristics of red-bedded mudstone in Central Sichuan under different humidity gradients[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2024,83(4):16. |
| APA | Yu, Fei,Cao, Yong,Geng, Yun,Yang, Qizhi,Wang, Jiangchen,&Dai, Zhangjun.(2024).Experimental study of the dehydration-shrinkage characteristics of red-bedded mudstone in Central Sichuan under different humidity gradients.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,83(4),16. |
| MLA | Yu, Fei,et al."Experimental study of the dehydration-shrinkage characteristics of red-bedded mudstone in Central Sichuan under different humidity gradients".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 83.4(2024):16. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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