HYDRAULIC CONDUCTIVITY TESTING OF GEOSYNTHETIC CLAY LINERS (GCLS) USING THE CONSTANT VOLUME METHOD

Hydraulic conductivity tests were conducted using open and constant-volume permeation systems on specimens from a geosynthetic clay liner (GCL). Two constant volume (CV) systems were employed: the falling-head constant-volume (FHCV) system and the constant-head constant-volume (CHCV) system. A conventional burette system using pressurized air was employed for the open system tests. The test results show that hydraulic conductivity tests can be conducted 30 or more times faster with the FHCV and CHCV systems than with an open system. Typically, the permeation portion of the FHCV and CHCV tests can be conducted in one-half a day. Slightly lower hydraulic conductivities are measured with the CV systems due to the slightly higher effective stress applied during testing with these systems. The CHCV system has several advantages over the FHCV system, including minimizing initial transient behavior, constant applied effective stress during testing, and simpler calculations.

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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:
  • Wang, X
  • Benson, C H
• Publication Date: 1999-12

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 277-283
• Serial:
  • Geotechnical Testing Journal
  • Volume: 22
  • Issue Number: 4
  • 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: Geosynthetics; Materials tests; Permeability coefficient; Test procedures
• Uncontrolled Terms: Constant volume method; Geosynthetic clay liners
• Subject Areas: Geotechnology; Highways; Materials; I35: Miscellaneous Materials;

Filing Info

• Accession Number: 00780049
• Record Type: Publication
• Files: TRIS
• Created Date: Dec 13 1999 12:00AM