Experimental investigation of the influence of dry-wet, freeze-thaw and water immersion treatments on the mechanical strength of the clay-bearing green sandstone

doi:10.1016/j.ijrmms.2021.104613

	Experimental investigation of the influence of dry-wet, freeze-thaw and water immersion treatments on the mechanical strength of the clay-bearing green sandstone
	Huang, Shibing 1,3; He, Yingbo 1,3; Liu, Xuewei 2; Xin, Zekun 1,3
刊名	INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
	2021-02-01
卷号	138 页码:10
关键词	Dry-wet cycle Freeze-thaw cycle Water immersion Clay-bearing sandstone Water weakening mechanism Mechanical strength
ISSN号	1365-1609
DOI	10.1016/j.ijrmms.2021.104613
英文摘要	The presence of water in sandstones has caused many engineering geology disasters. In order to investigate the weakening mechanism of the clay-bearing green sandstone caused by water at different ambient temperature, the main water treatments have been conducted in this research, including dry-wet cycles, water immersion and freeze-thaw cycles. It shows that the repeated dry-wet cycles have little effect on the mechanical strength of this sandstone due to the lack of expansive clay minerals like montmorillonite. However, the water immersion and cyclic freeze-thaw treatments have caused a remarkable reduction of the strength. The TICS (uniaxial compressive strength) of this green sandstone has decreased by 27.2% from the dry to saturated state and it continues to decline for another 31.1% after 60 times of freeze-thaw cycles. In addition, the internal friction angle has a little increment but the cohesion decreases quickly with increasing freeze-thaw cycles. The adverse influence of the freeze-thaw damage on the TCS (triaxial compressive strength) would be inhibited by the confining pressure, because the pores and microcracks were compacted under a high confining pressure. The novel findings of this study are that the reversible physical softening should be responsible for the water weakening of this clay-bearing green sandstone above 0 degrees C, and the freeze-thaw damage is irreversible due to the production of plastic frost heaving deformation below 0 degrees C. Therefore, it is suggested that the effect of water weakening on the mechanical properties of the green sandstone should be considered in the wet state regardless of the number of dry-wet cycles, especially in cold regions.
资助项目	National Natural Science Foundation of China[42072300] ; National Natural Science Foundation of China[41702291] ; Nature Science Foundation of Hubei Province[2019CFB535] ; China Scholarship Council[201804910219]
WOS研究方向	Engineering ; Mining & Mineral Processing
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000620285400005
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/25773]
专题	中科院武汉岩土力学所
通讯作者	Liu, Xuewei
作者单位	1.Wuhan Univ Sci & Technol, Sch Resources & Environm Engn, Wuhan 430081, Hubei, Peoples R China 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 3.Wuhan Univ Sci & Technol, Hubei Key Lab Efficient Utilizat & Agglomerat Met, Wuhan 430081, Hubei, Peoples R China
推荐引用方式 GB/T 7714	Huang, Shibing,He, Yingbo,Liu, Xuewei,et al. Experimental investigation of the influence of dry-wet, freeze-thaw and water immersion treatments on the mechanical strength of the clay-bearing green sandstone[J]. INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,2021,138:10.
APA	Huang, Shibing,He, Yingbo,Liu, Xuewei,&Xin, Zekun.(2021).Experimental investigation of the influence of dry-wet, freeze-thaw and water immersion treatments on the mechanical strength of the clay-bearing green sandstone.INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES,138,10.
MLA	Huang, Shibing,et al."Experimental investigation of the influence of dry-wet, freeze-thaw and water immersion treatments on the mechanical strength of the clay-bearing green sandstone".INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES 138(2021):10.