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Unsaturated Hydraulic Conductivity of Compacted Bentonite: Revisit of Microstructure Effects

  • Tian Chen
  • Majid Sedighi
  • Andrey Jivkov
  • Suresh C. Seetharam
Conference paper
Part of the Environmental Science and Engineering book series (ESE)

Abstract

Developing a sound theoretical description for the evolution of unsaturated hydraulic conductivity of compacted bentonite during re-saturation has remained a challenge because of the complex microstructure effects influenced by physico-chemical phenomena. This paper proposes a new relationship for the unsaturated hydraulic conductivity of compacted bentonite based on Kozeny-Carman relationship. A new relationship is also proposed for the relative permeability of compacted bentonite that incorporates the effects of microstructure swelling. The application of the new relationship for the case of compacted GMZ bentonite provides well correlated results with the experimental data reported in the literature.

Keywords

Compacted bentonite Clay microstructure Unsaturated Permeability 

Notes

Acknowledgements

Financial support through the University of Manchester’s President Doctoral Scholarship Award for Tian Chen (1st author) is gratefully acknowledged.

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Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  • Tian Chen
    • 1
  • Majid Sedighi
    • 1
  • Andrey Jivkov
    • 1
  • Suresh C. Seetharam
    • 2
  1. 1.School of Mechanical, Aerospace and Civil EngineeringThe University of ManchesterManchesterUK
  2. 2.Engineered and Geosystems Analysis UnitBelgian Nuclear Research Centre, SCK-CENMolBelgium

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