Simulation of swelling pressure evolution during infiltration in a bentonite block-pellet laboratory scale test

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Abstract

This paper presents numerical simulation of an infiltration test performed on MX-80 block-pellet laboratory sample. The simulation is performed with Thebes Code, a fully coupled THMC finite element program. The focus of the simulation is to recover the observed swelling pressure and dry density of the initially inhomogeneous system during the hydration process and at the final fully saturated state. The numerical results show that the simulation is capable to capture the qualitative response reported in the experimental results. However, the quantitative predictions still need improvements. That could be achieved by better simulation of the three-dimensional geometry of the pellets and further incorporation of the microstructural effects in the employed hydro-mechanical constitutive models.

Details

Original languageEnglish
Title of host publicationJapanese Geotechnical Society Special Publication
Publication statusPublished - 23 Aug 2019
MoE publication typeA4 Article in a conference publication
EventAsia-Pacific Conference on Unsaturated Soils - Nagoya, Japan
Duration: 23 Aug 201925 Aug 2019
Conference number: 7

Publication series

NameJapanese Geotechnical Society Special Publication
PublisherJapanese Geotechnical Society
Number2
Volume7
ISSN (Electronic)2188-8027

Conference

ConferenceAsia-Pacific Conference on Unsaturated Soils
Abbreviated titleAP-UNSAT
CountryJapan
CityNagoya
Period23/08/201925/08/2019

    Research areas

  • nuclear waste, bentonite, coupling, finite element method

ID: 36270572