Published June 2003 | Version v1
Journal article Metadata-only

Micro-structure of bentonite clay and diffusion coefficient given by multiscale homogenization analysis

Creators

  • 1. National Inst. of Advanced Industrial Science and Technology, Tsukuba, Ibaraki (Japan)
  • 2. Nagoya Univ., Dept. of Environmental Engineering and Architecture, Nagoya, Aichi (Japan)
  • 3. Tokyo Inst. of Technology, Dept. of Earth and Planetary Science, Tokyo (Japan)
  • 4. Nuclear Waste Management Organization of Japan, Tokyo (Japan)

Description

Bentonite consists of nanometer scale of smectitic clay minerals (mainly montmorillonite) and micrometer scale of macro-grains (mainly quatz). Properties of saturated bentonite are characterized by hydrated clay minerals. For a diffusion problem in bentonite we developed a new multiscale homogenization analysis (HA) procedure which relates microscale characteristics with a macroscopic behavior. We discuss diffusion properties of tritium water (HTO) compared with experimental data. Microscopic properties of the montmorillonite hydrate such as diffusivity of chemical species which are used in HA are determined by a molecular dynamics (MD) simulation method. We show the calculated results are consistent with macroscale experimental data. (author)

Additional details

Publishing Information

Journal Title
Materials Science Research International
Journal Volume
9
Journal Issue
2
Journal Page Range
p. 117-124
ISSN
1341-1683

INIS

Country of Publication
Japan
Country of Input or Organization
Japan
INIS RN
34060070
Subject category
S36: MATERIALS SCIENCE; S12: MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES;
Descriptors DEI
BENTONITE; DIFFUSION; DIFFUSION BARRIERS; EVALUATION; HOMOGENIZATION METHODS; HYDRATES; MICROSTRUCTURE; MOLECULAR DYNAMICS METHOD; MONTMORILLONITE; SIMULATION; TRITIUM OXIDES
Descriptors DEC
CALCULATION METHODS; CHALCOGENIDES; CLAYS; HYDROGEN COMPOUNDS; INORGANIC ION EXCHANGERS; ION EXCHANGE MATERIALS; MATERIALS; MINERALS; OXIDES; OXYGEN COMPOUNDS; SILICATE MINERALS; TRITIUM COMPOUNDS; WATER

Optional Information

Notes
15 refs., 11 figs., 4 tabs.