Micro/macro treatment in diffusion problem - Clay and a possibility for mudstone

Kazumi Kitayama, Naoki Fujii, Satoru Suzuki, Masahiro Sibata, Katsuyuki Kawamura, Yasuaki Ichikawa

Research output: Contribution to journalArticlepeer-review


Diffusion in clay and mudstone is a peculiar phenomenon because of involved clay minerals. Clay and mudstone are a microinhomogeneous material. In order to understand the true behavior, first we specify the microstructure by a conforcal laser scanning microscope (CLSM) together with SEM, second the material properties of each constituent component are identified by a molecular dynamics simulation (MD), and third the microscale characteristics are related to the macroscale behavior by a multiscale homogenization analysis method (HA). Note that the bentonite generally consists of montmorillonite with the size of about 100nm and chalcedony with the size of about 10̃50μm, so we introduce the multiscale HA with mesoscale and microscale systems. We show diffusion characteristics of tritium water (HTO) in bentonite. The numerical results of this MD/HA procedure are consistent experimental ones.

Original languageEnglish
Pages (from-to)458-465
Number of pages8
JournalZairyo/Journal of the Society of Materials Science, Japan
Issue number5
Publication statusPublished - May 2003
Externally publishedYes


  • Clay
  • Conforcal laser scanning microscope (CLSM)
  • Diffusion
  • HTO
  • Microscale characterization
  • Molecular dynamics (MD)
  • Mudstone
  • Multiscale homogenization analysis (HA)

ASJC Scopus subject areas

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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