APPARATUS AND PROCEDURES FOR ASSESSING INORGANIC DIFFUSION COEFFICIENTS FOR GEOSYNTHETIC CLAY LINERS

This paper describes the apparatus and procedures for performing tests to obtain inorganic diffusion coefficients for Geosynthetic Clay Liners (GCLs). The processes that can affect interpretation of these tests (diffusion, anion exclusion, and osmosis) are also discussed. Results from several inorganic diffusion tests on GCL and bentonite specimens show that the diffusion coefficients deduced for sodium and chloride are directly related to the final bentonite void ratio. It is shown that diffusion through GCLs can be modeled using a bulk porous media diffusion coefficient consisting of the total porosity and a deduced diffusion coefficient, without the need to establish the true effective diffusion coefficient and effective porosity. However, for a longer bentonite plug sample it is shown that the true effective diffusion coefficient and effective porosity must be established to predict the contaminant transport through the sample.

• Availability:
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• Corporate Authors:

  American Society for Testing and Materials (ASTM)

  100 Barr Harbor Drive, P.O. Box C700
  West Conshohocken, PA  United States  19428-2957
• Authors:
  • Rowe, R K
  • Lake, C B
  • Petrov, R J
• Publication Date: 2000-6

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 206-214
• Serial:
  • Geotechnical Testing Journal
  • Volume: 23
  • Issue Number: 2
  • Publisher: ASTM International
  • ISSN: 0149-6115
  • EISSN: 1945-7545
  • Serial URL: https://www.astm.org/products-services/standards-and-publications/geotechnical-testing-journal.html

Subject/Index Terms

• TRT Terms: Bentonite; Coefficients; Geosynthetics; Geotechnical engineering; Inorganic compounds; Porosity; Soil mechanics; Tests specific to a material, structure or device; Void ratios
• Uncontrolled Terms: Diffusion (Geosynthetics)
• Subject Areas: Geotechnology; Highways; Materials; I35: Miscellaneous Materials; I42: Soil Mechanics;

Filing Info

• Accession Number: 00794530
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 15 2000 12:00AM