SAND-BENTONITE LINERS: FIELD CONTROL METHODS

Soil-bentonite mixes are frequently used as impervious liners for waste disposal projects. These mixes can be controlled in the field by local permeability tests or by their global performance. The accuracy of in situ local tests is found to be limited after the thermal dilation of infiltrometers is considered. A method is developed to analyze the total leakage rate and to detect hydraulically induced damage and deterioration of hydraulic defects. Finally, the use of coupled hydrometer tests or X-ray diffraction tests is recommended to determine local values of bentonite content and to verify whether the in situ variability in bentonite content is similar to that provided for in the design.

• Corporate Authors:

  National Research Council of Canada

  Research Journals
  Ottawa, Ontario K1A 0R6,   Canada 
• Authors:
  • Chapuis, R P
• Publication Date: 1990-4

Media Info

• Features: Figures; References;
• Pagination: p. 216-223
• Serial:
  • CANADIAN GEOTECHNICAL JOURNAL
  • Volume: 27
  • Issue Number: 2
  • Publisher: National Research Council of Canada

Subject/Index Terms

• TRT Terms: Accuracy; Bentonite; Diffraction; Field tests; Hydrometers; Impervious soils; Leakage; Measurement; Permeability; Waste disposal facilities; X rays
• Uncontrolled Terms: X-ray diffraction
• Old TRIS Terms: Field control; Hydrometer method; Permeability measurement
• Subject Areas: Highways; Terminals and Facilities;

Filing Info

• Accession Number: 00495637
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 31 1990 12:00AM