Analysis of key thermal coupled factors in modelling of bentonite barriers

Abhishek Gupta*, Ayman Abed, Wojciech Tomasz Sołowski

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

27 Downloads (Pure)

Abstract

Bentonite is a material considered to be used as a component of a barrier in deep geological repositories for nuclear waste. Its behaviour is affected by temperature, humidity and chemical composition of water saturating its pores. Reproduction of bentonite behaviour in such thermo-hydro-mechanical (THM) conditions involves extensive use of empirical and physical coupled relationships. This paper investigates parameters, which influence the bentonite behaviour in THM experiments relevant to the conditions in the repositories. For the study, a numerical investigation is performed based on test simulation computed with the finite element code Thebes (Abed and Sołowski 2017). A numerical simulation by Abed and Sołowski (2017) of a non-isothermal infiltration experiment (Villar and Gomez-Espina 2009) has been taken as a basis for the investigation. The results of this simulation were compared with a series of 7 other simulations that are set up by inactivating the selected thermally coupled variables, one at a time. Presented results identify the key parameters the simulation is sensitive to and provide insights on the relevance of the underlying coupled processes.
Original languageEnglish
Title of host publicationThird International Symposium on Coupled Phenomena in Environmental Geotechnics
PublisherJapanese Geotechnical Society
Pages88-93
Number of pages6
Volume9
DOIs
Publication statusPublished - 12 Oct 2021
MoE publication typeA4 Conference publication
EventInternational Symposium on Coupled Phenomena in Environmental Geotechnics - Kyoto, Japan
Duration: 20 Oct 202121 Oct 2021
Conference number: 3

Publication series

Name
PublisherJapanese Geotechnical Society Special Publication
Number3
Volume9
ISSN (Print)2188-8027
ISSN (Electronic)2188-8027

Conference

ConferenceInternational Symposium on Coupled Phenomena in Environmental Geotechnics
Country/TerritoryJapan
CityKyoto
Period20/10/202121/10/2021

Keywords

  • bentonite
  • nuclear repository
  • thermo-hydro-mechanical coupling
  • net mean stress

Fingerprint

Dive into the research topics of 'Analysis of key thermal coupled factors in modelling of bentonite barriers'. Together they form a unique fingerprint.

Cite this