STRESS-DEFORMATION AND STRENGTH CHARACTERISTICS OF A COMPACTED SHALE

This report presents the results of a laboratory investigation to determine the influence of compaction and confining pressure on the stress-deformation and strength characteristics of a mechanically hard but non-durable shale from the New Providence Formation. Some construction guidelines are also recommended. Cylindrical specimens formed by kneading compaction were saturated under a low effective confining pressure, consolidated to the desired effective stress and sheared at a constant rate of strain. The compaction characteristics, the volume changes after saturation, the consolidation characteristics, and the undrained shearing response including pore water pressure changes are reported for triaxial tests. The initial gradation of crushed shale aggregate, the molding water content, the compaction pressure, and the pre-shear consolidation pressure were adopted as the test variables. The effective stress strength parameters were found to be essentially independent of the initial conditions when they were evaluated at maximum deviator stress, except for loose uncompacted aggregate. The volume change characteristics, the induced pore water presures, and the consolidated undrained strength were found to be greatly dependent on the initial conditions. /FHWA/

  • Supplemental Notes:
    • Prepared in cooperation with the Department of Transportation Federal Highway Adminsitration. Study title: Design and Construction Guidelines for Shale Embankments.
  • Corporate Authors:

    Purdue University/Indiana Department of Transportation JHRP

    Purdue University, School of Civil Engineering
    West Lafayette, IN  United States  47907-1284
  • Authors:
    • Abeyesekera, R A
  • Publication Date: 1977-12-27

Media Info

  • Features: Appendices; Figures; References; Tables;
  • Pagination: 417 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00185283
  • Record Type: Publication
  • Source Agency: Federal Highway Administration
  • Report/Paper Numbers: FHWA-IN-78-77-24 Intrm Rpt., FCP 44D5-022
  • Contract Numbers: 1(14) Part II
  • Files: TRIS, ATRI, USDOT
  • Created Date: Mar 14 1979 12:00AM