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Analysis of microstructural images of dry and water-saturated compacted bentonite samples observed with X-ray micro CT

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Title: Analysis of microstructural images of dry and water-saturated compacted bentonite samples observed with X-ray micro CT
Authors: Tomioka, Satoshi Browse this author →KAKEN DB
Kozaki, Tamotsu Browse this author →KAKEN DB
Takamatsu, Hidenori Browse this author
Noda, Natsuko Browse this author
Nisiyama, Shusuke Browse this author →KAKEN DB
Kozai, Naofumi Browse this author
Suzuki, Satoru Browse this author
Sato, Seichi Browse this author
Keywords: micro computed tomography
geological disposal
compacted bentonite
Issue Date: Jan-2010
Publisher: Elsevier B.V.
Journal Title: Applied Clay Science
Volume: 47
Issue: 1-2
Start Page: 65
End Page: 71
Publisher DOI: 10.1016/j.clay.2008.09.001
Abstract: Compacted bentonite, of which the major clay mineral is montmorillonite, is a candidate buffer material for geological disposal of high-level radioactive waste. In this study, a microfocus X-ray computed tomography (micro-CT, X-ray micro-scope), which enables non-destructive, three-dimensional observation of the interior microstructure of a sample with high resolution (several microns), examined compacted montmorillonite samples under dry and water-saturated states. The images thus obtained were analyzed by a computer code developed for this study to obtain the information on the size and shape of montmorillonite grains in the samples before and after the water saturation. From the results of the image analysis, it can be supposed that the outer montmorillonite sheets of grains swelled and formed a gel, whereas the inner montmorillonite sheets did not change significantly in the water-saturation process.
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 富岡 智

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