Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Conferences, Workshops, Symposiums, and Seminars
  4. Experimental and Numerical Investigation on Water Exchange of Opalinus Clay Samples
 
conference paper

Experimental and Numerical Investigation on Water Exchange of Opalinus Clay Samples

Llabjani, Qazim  
•
Vespo, Vincenzo Sergio
•
Stavropoulou, Eleni  
Show more
2023
Springer Series in Geomechanics and Geoengineering

Opalinus Clay is a fine-grained sedimentary geomaterial with a mineral composition consisting mainly of silicates, carbonates and quartz. Due to its favourable barrier properties, this geomaterial has been selected as the host rock for the underground disposal of radioactive waste in Switzerland. In this context, the hydro-mechanical state of Opalinus Clay will be affected by subsequent drying and wetting phenomena. Design procedures require then an appropriate understanding of the processes related to water exchange. To analyse the behaviour of Opalinus Clay upon suction changes and to define its water retention properties, the vapour equilibrium technique is combined with an accurate assessment of the deformations in the two orthogonal directions using strain gauges. Based on those results, a 3D Thermo-Hydro-Mechanical Finite Element model is implemented and validated. Preliminary analysis shows overall a good agreement between experimental data and modelling results in terms of change in water content, degree of saturation and equilibrium time. The numerical model will be used to define an accurate law for the tortuosity and permeability evolution of Opalinus Clay when subjected to suction variations, that is required to simulate the behaviour of a nuclear waste disposal system.

  • Details
  • Metrics
Type
conference paper
DOI
10.1007/978-3-031-34761-0_41
Author(s)
Llabjani, Qazim  
Vespo, Vincenzo Sergio
Stavropoulou, Eleni  
Ferrari, Alessio  
Musso, Guido
Date Issued

2023

Publisher

Wei Wu, Universität für Bodenkultur

Publisher place

Vienna, Austria

Published in
Springer Series in Geomechanics and Geoengineering
ISBN of the book

978-3-031-34760-3

978-3-031-34761-0

Start page

335

End page

342

Subjects

Opalinus Clay

•

hydro-mechanical behaviour

•

vapour equilibrium technique

•

FE-model

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LMS  
Available on Infoscience
January 25, 2024
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/203143
Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés