Experimental study on the mechanical properties weakening mechanism of siltstone with different water content
文献类型：期刊论文
| 作者 | Li, Bingyang; Liu, Jian; Bian, Kang; Ai, Fei; Hu, Xunjian; Chen, Ming; Liu, Zhenping |
| 刊名 | ARABIAN JOURNAL OF GEOSCIENCES
 |
| 出版日期 | 2019 |
| 卷号 | 12期号:21页码:- |
| 关键词 | Water content Strength Confining pressure Exponential criterion Microscopic damage |
| ISSN号 | 1866-7511 |
| DOI | 10.1007/s12517-019-4852-8 |
| 英文摘要 | The mechanical properties of rock materials are remarkably affected by water content. To reveal the effect of water content on the strength and deformation properties of siltstone, which was collected from the quarry of Zhundong Coalmine, the scanning electron microscope and uniaxial compression tests of siltstone specimens were carried out with a water content of 0%, 0.5%, 1.5%, and 2.8%. Conventional triaxial compression test was conducted in dry and saturated conditions. The test results showed that the strength and deformation parameters of siltstone are weakened with different degrees after water absorption. The deformation of the plastic yield stage in the stress-strain curve decreases with rising of water content, while the loss rate of uniaxial compression strength continues to increase until reached saturated state. The strength of dry and saturated specimens varies regularly with confining pressure, and their relationship can be described with the exponential criterion. In addition, it is observed that microscopic damage of siltstone specimens accumulates as water content increases. The hydration of clay minerals reduces the local cohesion of specimens, and the hydrolysis of quartz minerals in crack tip region promotes subcritical crack growth during the loading process, which collaboratively results in the bearing capacity of saturated specimen decrease. The results can provide a reference for the analysis of rock strength and damage mechanism under the action of water erosion. |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000492895100003 |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/14838]  |
| 专题 | 岩土力学所知识全产出_期刊论文 国家重点实验室知识产出_期刊论文 |
| 作者单位 | 1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China; |
| 推荐引用方式 GB/T 7714 | Li, Bingyang,Liu, Jian,Bian, Kang,et al. Experimental study on the mechanical properties weakening mechanism of siltstone with different water content[J]. ARABIAN JOURNAL OF GEOSCIENCES,2019,12(21):-. |
| APA | Li, Bingyang.,Liu, Jian.,Bian, Kang.,Ai, Fei.,Hu, Xunjian.,...&Liu, Zhenping.(2019).Experimental study on the mechanical properties weakening mechanism of siltstone with different water content.ARABIAN JOURNAL OF GEOSCIENCES,12(21),-. |
| MLA | Li, Bingyang,et al."Experimental study on the mechanical properties weakening mechanism of siltstone with different water content".ARABIAN JOURNAL OF GEOSCIENCES 12.21(2019):-. |
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。