Material Microstructure Effects in Thermo-Hydro-Mechanical Modelling of Bentonite

Ayman A. Abed*, Wojciech T. Solowski

*Corresponding author for this work

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

1 Citation (Scopus)

Abstract

This paper discusses the introduction of effects related to the bentonite microstructure into a new fully coupled thermo-hydro-mechanical (THM) finite element code. After a brief review of the governing balance equations and their implementation, the paper discusses in greater details the material microstructure effect on the hydraulic behaviour of bentonite and how to incorporate it in the modelling framework. Based on the experimental data for the MX-80 bentonite, the parameters needed for the new formulation are calibrated and employed in modelling of a constant volume infiltration experiment. The obtained swelling pressure from the numerical simulation is in good agreement with experimental results and improved when compared to the simulation which does not take into account bentonite microstructure. The framework enhancement allows also for a better understanding of the microstructure role in the macroscopically observed bentonite behaviour.

Original languageEnglish
Title of host publicationPANAM UNSATURATED SOILS 2017: FUNDAMENTALS
EditorsLR Hoyos, JS McCartney, SL Houston, WJ Likos
PublisherAMERICAN SOCIETY OF CIVIL ENGINEERS
Pages330-339
Number of pages10
ISBN (Electronic)9780784481684
DOIs
Publication statusPublished - 2018
MoE publication typeA4 Article in a conference publication
EventPan-American Conference on Unsaturated Soils - Dallas, United States
Duration: 12 Nov 201715 Nov 2017
Conference number: 2

Publication series

NameGeotechnical Special Publication
PublisherAMER SOC CIVIL ENGINEERS
Number301
ISSN (Print)0895-0563

Conference

ConferencePan-American Conference on Unsaturated Soils
Abbreviated titlePanAm-UNSAT
CountryUnited States
CityDallas
Period12/11/201715/11/2017

Keywords

  • BARCELONA BASIC MODEL
  • STRESS INTEGRATION
  • UNSATURATED SOILS
  • EQUATIONS
  • IMPLEMENTATION
  • BEHAVIOR
  • CLAYS

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