Macro- and Microresearch on Swelling Characteristics and Deformation Mechanism of Red-Bed Mudstone in Central Sichuan, China
文献类型：期刊论文
| 作者 | Yu, Fei; Tong, Kai-wen; Dai, Zhang-jun; Feng, Gao-shun; Zhou, Zhe; Chen, Shan-xiong |
| 刊名 | GEOFLUIDS
 |
| 出版日期 | 2022-05-05 |
| 卷号 | 2022 |
| ISSN号 | 1468-8115 |
| 英文摘要 | Exploring the development of multiscale behaviors of red-bed mudstone is beneficial for in-depth evaluation of swelling capacity and its progressive failure mechanism. In this paper, a macro-micro study was performed on rock samples in central Sichuan, China. The influence of environmental factors such as water content, degree of soaking, and gaseous moisture absorption was discussed. Spatial characterizations were finally described from pore structure and distribution. Experimental results suggested that deformation curve under water immersion had three stages of rapid growth, deceleration growth, and gradual stabilization. It can enter stable deformation within 60 similar to 80h and has short-term swelling effects, while gaseous moisture absorption presented long-term performance during 0 similar to 700 h. The difference in deformation between partial and complete immersion may be the release of swelling potential caused by humidity gradient and capillary suction. The strain-time curves during water immersion all tended to short-term swelling. Moreover, repeated drying and wetting promoted the time of shrinkage adjustment in the second cycle to be significantly shortened, resulting in a large amount of irreversible plastic deformation. Although initial water content influenced the final stable strain, it only changed the degree of deformation at initial stage. For the microscale structures, the closer to the end, the greater the porosity and the smaller the middle. The average porosity after 0, 1, and 2 dry and wet cycles reached 0.227%, 4.027%, and 6.121%, respectively. Geometric parameters such as volume and surface area of the pores enlarged with the increase of the number of cycles. Small pores gradually evolved into microcracks and large fissures. Besides, the pores developed from tree-like to net-like structures with continuous cycles. |
| 学科主题 | Geochemistry & Geophysics ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000797461500002 |
| 出版者 | WILEY-HINDAWI |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/34871]  |
| 专题 | 中科院武汉岩土力学所 |
| 作者单位 | 1.Chinese Academy of Sciences; Wuhan Institute of Rock & Soil Mechanics, CAS; 2.Chinese Academy of Sciences; University of Chinese Academy of Sciences, CAS |
| 推荐引用方式 GB/T 7714 | Yu, Fei,Tong, Kai-wen,Dai, Zhang-jun,et al. Macro- and Microresearch on Swelling Characteristics and Deformation Mechanism of Red-Bed Mudstone in Central Sichuan, China[J]. GEOFLUIDS,2022,2022. |
| APA | Yu, Fei,Tong, Kai-wen,Dai, Zhang-jun,Feng, Gao-shun,Zhou, Zhe,&Chen, Shan-xiong.(2022).Macro- and Microresearch on Swelling Characteristics and Deformation Mechanism of Red-Bed Mudstone in Central Sichuan, China.GEOFLUIDS,2022. |
| MLA | Yu, Fei,et al."Macro- and Microresearch on Swelling Characteristics and Deformation Mechanism of Red-Bed Mudstone in Central Sichuan, China".GEOFLUIDS 2022(2022). |
入库方式： OAI收割
来源：武汉岩土力学研究所
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