Experimental study on the mechanical properties weakening mechanism of siltstone with different water content

doi:10.1007/s12517-019-4852-8

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	Experimental study on the mechanical properties weakening mechanism of siltstone with different water content
	Li, Bingyang ; Liu, Jian ; Bian, Kang ; Ai, Fei ; Hu, Xunjian ; Chen, Ming ; Liu, Zhenping
	2019
发表期刊	ARABIAN JOURNAL OF GEOSCIENCES
ISSN	1866-7511
卷号	12 期号:21 页码:-
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.
关键词	Water content Strength Confining pressure Exponential criterion Microscopic damage
DOI	10.1007/s12517-019-4852-8
收录类别	SCI
语种	英语
WOS研究方向	Geology
WOS类目	Geosciences, Multidisciplinary
WOS记录号	WOS:000492895100003
引用统计	被引频次：15[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	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.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Hubei, Peoples R China; 2.Univ Chinese Acad Sci, Beijing 100049, 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):-.

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