PREDICTION MODEL FOR UNSATURATED HYDRAULIC CONDUCTIVITY OF HIGHWAY SOILS

A method of predicting the hydraulic conductivites of subgrades and highway soil materials is discussed. In this method, the relation of soil moisture content and suction head is used to calculate the unsaturated hydraulic conductivity of soil. The value of the hydraulic conductivity at saturation (the soil permeability) is used as a matching factor during the calculations. The soil moisture content and suction head relation and the saturated conductivities of subgrades were determined in the laboratory by using the commercially available Tempe cell. Disturbed and undisturbed samples of Drummer and Fayette-C subgrades, Ottawa sand, and class X concrete sand were used in this study. The comparison between the experimental and the calculated values shows that the method successfully predicts the hydraulic conductivities of highway soil materials. /Author/

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/trr/1977/642/642-007.pdf
• Summary URL:
  • https://scholar.google.com/scholar_lookup?title=PREDICTION+MODEL+FOR+UNSATURATED+HYDRAULIC+CONDUCTIVITY+OF+HIGHWAY+SOILS&author=A.+Elzeftawy&author=B.+Dempsey&publication_year=1977
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309026717
• Supplemental Notes:
  • Publication of this paper sponsored by Committee on Environmental Factors Except Frost. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Elzeftawy, Atef
  • Dempsey, Barry J
• Publication Date: 1977

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 30-35
• Monograph Title: Soil taxonomy and soil properties
• Serial:
  • Transportation Research Record
  • Issue Number: 642
  • Publisher: Transportation Research Board
  • ISSN: 0361-1981

Subject/Index Terms

• TRT Terms: Alternatives analysis; Forecasting; Laboratory tests; Mathematical models; Moisture content; Permeability; Permeability coefficient; Soils; Subgrade (Pavements); Unsaturated soils
• Uncontrolled Terms: Models
• Old TRIS Terms: Soil permeability
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00179007
• Record Type: Publication
• ISBN: 0309026717
• Files: TRIS, TRB
• Created Date: Aug 19 1978 12:00AM