UNSATURATED HYDRAULIC CONDUCTIVITY OF TWO COMPACTED BARRIER SOILS

Unsaturated hydraulic conductivities were measured for two compacted fine-grained soils used as barrier layers in landfill final covers. The instantaneous profile method was used for the laboratory and field measurements. Test results reveal similar unsaturated hydraulic conductivities for the two soils in both laboratory and field measurements. In addition, results of laboratory tests performed with samples prepared at different molding water contents and compactive efforts show that the unsaturated hydraulic conductivity function is insensitive to molding water content for matric suctions exceeding 20 m, but is strongly affected by compactive effort. Samples compacted with modified Proctor effort had unsaturated hydraulic conductivities nearly one order of magnitude lower than those compared with a standard Proctor effort. Investigators also found that estimated unsaturated hydraulic functions based on parameters describing the soil-water characteristic curve underestimate the unsaturated hydraulic conductivity function of these barrier soils.

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  • Find a library where document is available. Order URL: http://worldcat.org/issn/07339410
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Meerdink, J S
  • Benson, C H
  • Khire, M V
• Publication Date: 1996-7

Language

• English

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 565-576
• Serial:
  • Journal of Geotechnical Engineering
  • Volume: 122
  • Issue Number: 7
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9410

Subject/Index Terms

• TRT Terms: Barriers (Roads); Compacted soils; Compaction; Field tests; Fine grained soils; Forming; Laboratory tests; Landfills; Moisture content; Permeability coefficient; Unsaturated soils
• Uncontrolled Terms: Barriers
• Old TRIS Terms: Landfill covers; Molding water content
• Subject Areas: Geotechnology; Highways; I42: Soil Mechanics;

Filing Info

• Accession Number: 00726120
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 26 1996 12:00AM