Back

Title
  • en Analysis of microstructural images of dry and water-saturated compacted bentonite samples observed with X-ray micro CT
Creator
    • en Takamatsu, Hidenori
    • en Noda, Natsuko
    • en Kozai, Naofumi
    • en Suzuki, Satoru
    • en Sato, Seichi
Accessrights open access
Subject
  • Other en micro computed tomography
  • Other en geological disposal
  • Other en montmorillonite
  • Other en compacted bentonite
  • NDC 569
Description
  • Abstract en 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.
Publisher en Elsevier B.V.
Date
    Issued2010-01
Language
  • eng
Resource Type journal article
Version Type AM
Identifier HDL http://hdl.handle.net/2115/42844
Relation
  • isVersionOf DOI https://doi.org/10.1016/j.clay.2008.09.001
Journal
    • PISSN 0169-1317
      • en Applied Clay Science
      • Volume Number47 Issue Number1-2 Page Start65 Page End71
File
Oaidate 2023-07-26