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Theoretical assessment of fabric and permeability changes in clays affected by organic contaminants

Publication ,  Journal Article
Hueckel, T; Kaczmarek, M; Caramuscio, P
Published in: Canadian Geotechnical Journal
January 1, 1997

Permeability of clay is known, from laboratory tests, to increase over four orders of magnitude during low effective stress permeation with some concentrated organic liquids. On an engineering scale, in a one-dimensional purely advective flow through a finite layer, such evolution is shown numerically to cause a substantial acceleration of the progress of the contamination front, compared with a constant permeability case. For a 100-fold increase in intrinsic permeability for a 100% replacement of pore water with an organic, a two times shorter advective transit time is predicted. A series of quantitative fabric models based on interpretations and concepts proposed in the past are reformulated in quantitative terms. These models are associated with adsorbed water withdrawal, particle migration, and deposition leading to pore clogging, changes in connectivity or flocculation. Permeability is derived from the flow through a simplified structure formed by dominant pores in the actual pore size distribution. The formulation is applied to interpret previously published experimental data. It is found that a series connection of the dominant pores must be postulated rather than a parallel one, with the smaller pore acting as a bottle neck. A simple pore enlargement model is found not to be realistic. The numerically most consistent results are obtained for the flocculation model involving a particle rotation generating wedge-shaped channels.

Duke Scholars

Published In

Canadian Geotechnical Journal

DOI

ISSN

0008-3674

Publication Date

January 1, 1997

Volume

34

Issue

4

Start / End Page

588 / 603

Related Subject Headings

  • Geological & Geomatics Engineering
  • 4019 Resources engineering and extractive metallurgy
  • 4005 Civil engineering
  • 0907 Environmental Engineering
  • 0905 Civil Engineering
 

Citation

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Hueckel, T., Kaczmarek, M., & Caramuscio, P. (1997). Theoretical assessment of fabric and permeability changes in clays affected by organic contaminants. Canadian Geotechnical Journal, 34(4), 588–603. https://doi.org/10.1139/t97-013
Hueckel, T., M. Kaczmarek, and P. Caramuscio. “Theoretical assessment of fabric and permeability changes in clays affected by organic contaminants.” Canadian Geotechnical Journal 34, no. 4 (January 1, 1997): 588–603. https://doi.org/10.1139/t97-013.
Hueckel T, Kaczmarek M, Caramuscio P. Theoretical assessment of fabric and permeability changes in clays affected by organic contaminants. Canadian Geotechnical Journal. 1997 Jan 1;34(4):588–603.
Hueckel, T., et al. “Theoretical assessment of fabric and permeability changes in clays affected by organic contaminants.” Canadian Geotechnical Journal, vol. 34, no. 4, Jan. 1997, pp. 588–603. Scopus, doi:10.1139/t97-013.
Hueckel T, Kaczmarek M, Caramuscio P. Theoretical assessment of fabric and permeability changes in clays affected by organic contaminants. Canadian Geotechnical Journal. 1997 Jan 1;34(4):588–603.

Published In

Canadian Geotechnical Journal

DOI

ISSN

0008-3674

Publication Date

January 1, 1997

Volume

34

Issue

4

Start / End Page

588 / 603

Related Subject Headings

  • Geological & Geomatics Engineering
  • 4019 Resources engineering and extractive metallurgy
  • 4005 Civil engineering
  • 0907 Environmental Engineering
  • 0905 Civil Engineering