Relationship between capillary water absorption mechanism and pore structure and microfracture of red-layer mudstone in central Sichuan
文献类型：期刊论文
| 作者 | Huang, Kang; Yu, Fei; Zhang, Wei; Tong, Kaiwen; Guo, Jianhua; Li, Shichang; Chen, Shanxiong; Dai, Zhangjun |
| 刊名 | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
 |
| 出版日期 | 2023-04-01 |
| 卷号 | 82期号:4 |
| ISSN号 | 1435-9529 |
| 关键词 | Red-layer mudstone Pores and microfracture Wettability Capillary water absorption Wetting peak Hydration fracture |
| 英文摘要 | The pore-microfracture structure, water-rock interaction and capillary water absorption mechanism of red-layer mudstone were comprehensively studied. The mineral composition was determined using X-ray diffraction, and the pore-microfracture structure was observed using scanning electron microscopy. Mercury intrusion porosimetry and nitrogen physisorption were used to obtain pore throat size distribution information. The effects of mineral composition and pore structure on adsorption and desorption behaviour were investigated using water vapour physisorption. The wettability of the mudstone surface was characterised by contact angle measurement, atomic force microscopy. The capillary water absorption coefficient and capillary water absorption height of mudstone were quantitatively studied using capillary water absorption experiments. The results showed that the clay mineral content of mudstone was 46.8%, and the pores were mainly micropores and transition pores, which were very dense. The water vapour physical adsorption isotherm of mudstone showed that the average water-holding rate of mudstone was 31.47%. In the process of desorption of mudstone, the ink-bottle effect limited the desorption of water under medium and high relative humidity. The macroscopic contact angle of the mudstone surface was less than 29.79 degrees, indicating mudstone's strong hydrophilic property. The driving force of capillary water absorption of mudstone should consider the capillary force, osmotic pressure and gravity. The hydration fracture of the mudstone was the dominant channel of its capillary water absorption. Understanding the relationship between the water absorption mechanism of mudstone capillarity and pore-microfractures is necessary for revealing the disaster mechanism of the red-layer mudstone. |
| 学科主题 | Engineering ; Geology |
| 语种 | 英语 |
| 出版者 | SPRINGER HEIDELBERG |
| WOS记录号 | WOS:000943201500002 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/34810]  |
| 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 | Huang, Kang,Yu, Fei,Zhang, Wei,et al. Relationship between capillary water absorption mechanism and pore structure and microfracture of red-layer mudstone in central Sichuan[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2023,82(4). |
| APA | Huang, Kang.,Yu, Fei.,Zhang, Wei.,Tong, Kaiwen.,Guo, Jianhua.,...&Dai, Zhangjun.(2023).Relationship between capillary water absorption mechanism and pore structure and microfracture of red-layer mudstone in central Sichuan.BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,82(4). |
| MLA | Huang, Kang,et al."Relationship between capillary water absorption mechanism and pore structure and microfracture of red-layer mudstone in central Sichuan".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 82.4(2023). |
入库方式： OAI收割
来源：武汉岩土力学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。