Micro-scale experimental investigation of the swelling anisotropy of the Callovo-Oxfordian argillaceous rock

doi:10.1180/claymin.2013.048.2.17

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	Micro-scale experimental investigation of the swelling anisotropy of the Callovo-Oxfordian argillaceous rock
	Wang, L. L.1; Bornert, M.2; Chanchole, S.1; Yang, D. S.3; Heripre, E.1; Tanguy, A.1; Caldemaison, D.1
	2013
会议日期	OCT, 2012
会议地点	Montpellier, FRANCE
关键词	argillaceous rocks radioactive waste repository anisotropic swelling environmental scanning electron microscopy digital image correlation local strain field geomechanics
卷号	48
期号	2
DOI	10.1180/claymin.2013.048.2.17
页码	391-402
英文摘要	An experimental study of the swelling anisotropy of the Callovo-Oxfordian argillaceous rock under hydration is presented. The investigation, which combines environmental scanning electron microscopy (ESEM) and digital image correlation techniques, has been carried out at the micrometric scale of the composite microstructure of the rock. Specimens were hydrated in the ESEM over a wide range of relative humidity and observations conducted on two planes: plane 1 parallel to the bedding plane, and plane 2 perpendicular to it. The observations reveal that the local swelling (which can be quantified at a local gauge length of about 5 mm) is strongly anisotropic in both planes. The global swelling, measured over areas of about 500 mm in width, is also clearly anisotropic in plane 2 (with major swelling direction normal to the bedding plane), but not in plane 1. The global isotropy in plane 1 arises from the uniform distribution of the orientation of anisotropic local strains, while the anisotropic swelling in plane 2 is due to a preferred local orientation.
会议录	CLAY MINERALS
会议录出版者	MINERALOGICAL SOC
会议录出版地	TWICKENHAM
语种	英语
WOS研究方向	Chemistry ; Geology ; Mineralogy
WOS记录号	WOS:000326591800018
内容类型	会议论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/4786]
专题	岩土力学所知识全产出_会议论文
作者单位	1.Ecole Polytech, Lab Mecan Solides UMR 7649; 2.Univ Paris Est, IFSTTAR, ENPC, CNRS,Lab Navier UMR 8205; 3.Chinese Acad Sci, IRSM, State Lab Geomech & Geotech Engn
推荐引用方式 GB/T 7714	Wang, L. L.,Bornert, M.,Chanchole, S.,et al. Micro-scale experimental investigation of the swelling anisotropy of the Callovo-Oxfordian argillaceous rock[C]. 见:. Montpellier, FRANCE. OCT, 2012.