INVESTIGATIONS OF SUBGRADE MOISTURE CONDITIONS IN CONNECTION WITH THE DESIGN OF FLEXIBLE PAVEMENT STRUCTURES

THE OBJECTIVE WAS TO DETERMINE SUBGRADE MOISTURE CONDITIONS UNDER PAVEMENTS AND TO DEVELOP A RELATIVELY SIMPLE PROCEDURE FOR TREATING SOIL SPECIMENS IN ORDER TO SIMULATE ANTICIPATED FIELD MOISTURE CONDITIONS. FIELD SUBGRADE MOISTURE MEASUREMENTS WERE MADE AT 32 SITES OVER A TWO YEAR PERIOD. CORRELATION OF THE WETTEST MOISTURE CONTENT WITH PLASTIC LIMIT, OPTIMUM MOISTURE CONTENT AND AN ESTIMATED MOISTURE CONTENT, BASED ON THE DEPTH TO GROUND WATER TABLE, WAS NOT AS GOOD AS WITH AN ESTIMATED EQUILIBRIUM MOISTURE CONTENT, DETERMINED FROM CAPILLARY SOAKING TO A MOISTURE TENSION OF 3 FEET. THE SOAKING PROCEDURE IN CURRENT USE RESULTS IN MUCH WETTER TEST SPECIMENS. A SUGGESTED LABORATORY TEST PROCEDURE FOR SUBGRADE EVALUATION IS INCLUDED.

  • Corporate Authors:

    University of South Carolina, Columbia

    300 South Main Street
    Columbia, SC  United States  29208

    Federal Highway Administration

    1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Chu, T Y
    • Humphries, W K
  • Publication Date: 0

Media Info

  • Serial:
    • Issue Number: 523

Subject/Index Terms

Filing Info

  • Accession Number: 00230760
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Files: TRIS, USDOT
  • Created Date: Jun 18 1972 12:00AM