EFFECT OF ORGANIC TOPSOIL CONTENT ON STRESS-STRAIN CHARACTERISTICS OF A TILL SUBJECTED TO REPETITIVE LOADING

REPETITIVE CONSTANT-STRESS TRIAXIAL LABORATORY TESTS WERE USED TO DETERMINE RESILIENT AND RESIDUAL STRAINS AND RESILIENT MODULI OF A GLACIAL TILL MIXED WITH VARIOUS AMOUNTS OF LOW-ORGANIC-CONTENT GRASSLAND TOPSOIL AND HIGH-ORGANIC-CONTENT MEADOW-BOG TOPSOIL. AS TOPSOIL CONTENT INCREASED, LIQUID AND PLASTIC LIMITS, OPTIMUM WATER CONTENT, AND RESIDUAL AND RESILIENT AXIAL STRAINS INCREASED WHILE MAXIMUM DRY DENSITY AND RESILIENT MODULUS DECREASED. THE MAGNITUDE OF THESE EFFECTS VARIED WITH THE ORGANIC CARBON CONTENT OF THE TOPSOIL. ADDITION OF TOPSOIL INITIALLY INCREASED RESILIENT MODULUS, BUT THE GAIN FELL RAPIDLY AS MORE THAN 5 - 10 PERCENT TOPSOIL WAS ADDED. AS AN INITIAL STUDY, THIS INVESTIGATION SHOWED THAT SELECTED A-AND C-HORIZON SOIL MIXTURES COULD BE USED IN SUBGRADES. /AUTHOR/

  • Supplemental Notes:
    • Tech Rept 14, 36 PP, APPS
  • Corporate Authors:

    Saskatchewan Dept Hwys, Regina /Canada

    ,    
  • Authors:
    • CULLEY, R W
  • Publication Date: 1971-1

Subject/Index Terms

Filing Info

  • Accession Number: 00233108
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Aug 8 1971 12:00AM