Prediction of the Peak Shear Strength of Sandstone and Mudstone Joints Infilled with High Water-Cement Ratio Grouts

doi:10.1007/s00603-017-1225-z

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	Prediction of the Peak Shear Strength of Sandstone and Mudstone Joints Infilled with High Water-Cement Ratio Grouts
	Ma, Hao 1; Liu, Quansheng 1,2
刊名	ROCK MECHANICS AND ROCK ENGINEERING
	2017
卷号	50 期号:8 页码:2021-2037
关键词	Prediction Peak shear strength Infilled rock joints Grouts High water-cement ratio Direct shear tests
ISSN号	0723-2632
DOI	10.1007/s00603-017-1225-z
英文摘要	There are very few studies on the peak shear strength of cement-infilled joints, despite it being a key parameter in the grouting technique. To quantify this strength, the average elastic modulus of hardened cement pastes with a high water-cement ratio (w/c) has been determined by using a homogenization method, in which the bleeding ratio is includes. Based on a scanning electron microscope analysis of the micromorphology of the rock joint surface and study of the interfacial transition zone, the mechanisms of the microscopic bond shear failure at the interfaces between the cement pastes and rocks have been deduced, in which the effect of the macroscopic roughness has not been taken into consideration. Based on the JRC-JCS model of unfilled joints, which takes the macroscopic roughness into consideration, together with the microscopic bond shear model, a model has been developed that can predict the peak shear strength of cement-infilled joints of sandstone and mudstone. The predictions have been verified by experimental results. The results show that if the w/c is too low, then the grouting can weaken the rock mass. If the w/c is appropriate, then the increase to the peak shear strength can be determined by the model.
WOS研究方向	Engineering ; Geology
语种	英语
出版者	SPRINGER WIEN
WOS记录号	WOS:000407321700004
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4109]
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.Wuhan Univ, Sch Civil Engn, Key Lab Safety Geotech & Struct Engn Hubei Prov ; 2.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomechan & Geotech Engn
推荐引用方式 GB/T 7714	Ma, Hao,Liu, Quansheng. Prediction of the Peak Shear Strength of Sandstone and Mudstone Joints Infilled with High Water-Cement Ratio Grouts[J]. ROCK MECHANICS AND ROCK ENGINEERING,2017,50(8):2021-2037.
APA	Ma, Hao,&Liu, Quansheng.(2017).Prediction of the Peak Shear Strength of Sandstone and Mudstone Joints Infilled with High Water-Cement Ratio Grouts.ROCK MECHANICS AND ROCK ENGINEERING,50(8),2021-2037.
MLA	Ma, Hao,et al."Prediction of the Peak Shear Strength of Sandstone and Mudstone Joints Infilled with High Water-Cement Ratio Grouts".ROCK MECHANICS AND ROCK ENGINEERING 50.8(2017):2021-2037.