THE EFFECT OF LABORATORY COMPACTION ON THE UNCONSOLIDATED-UNDRAINED STRENGTH BEHAVIOR OF A HIGHLY PLASTIC CLAY

Samples of the St. Croix clay were compacted by the kneading device to fit moisture-density values on impact compaction control curves. The compacted combinations were for low, medium and high energies at moisture contents dry, near, and wet of optimum. The samples were confined at levels representing various positions within an embankment. Both confinement and shear to failure were without drainage. Regression techniques were used for form statistically valid equations for the dependent variables of dry density and compressive strength. Dry of optimum density was a function of water content and compactive work ratio, while wet of optimum density depended upon water content only. Dry of optimum compressive strength depended upon water content, dry density, degree of saturation and confining pressure. Wet of optimum strength decreased with increasing water content. These equations will be helpful in writing compaction specifications to control as compacted stability of clay embankments. (FHWA)

  • Supplemental Notes:
    • Prepared in cooperation with the Department of Transportation, Federal Highway Administration. Part of FHWA HPR Part II Study titled "Improving Embankment Design and Performance."
  • Corporate Authors:

    Purdue University/Indiana Department of Transportation JHRP

    Purdue University, School of Civil Engineering
    West Lafayette, IN  United States  47907-1284

    Indiana State Highway Commission

    Indianapolis, IN  United States  46204
  • Authors:
    • Weitzel, D W
    • Lovell, C W
  • Publication Date: 1979-9

Media Info

  • Pagination: 218 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00319123
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FHWA-IN-JHRP-79/11 Intrm Rpt., FCP 40S3-562
  • Contract Numbers: 1 (17) Part II
  • Files: TRIS
  • Created Date: Nov 19 1980 12:00AM