STRESS-STRAIN PROPERTIES OF COMPACTED CLAYS

The discussers describe studies (similar to those described in the paper) and discuss five main areas of difference. (1) The data analyzed indicate that the 70 and 90 percent fitting points are satisfactory and that the failure ratio values differ greatly with material type and compaction conditions. The data for 66 stress-strain curves from 11 compacted cohesive soils show a range in failure ratio from 0.19-0.98. Data for 107 curves on one additional soil show a range from 0.18-0.95. The mean of these data (0.67) does not support the authors recommendation that a value for the failure ratio of 0.9 should be used for all compacted clays. (2) The use of a new failure linear law is questioned. (3) The opinion is expressed that the linear Mohr-Coulomb relationship at low pressures, in conjunction with a phi=0 equation at high pressures, adequately models the strength behavior of compacted cohesive soils tested under UU conditions. (4) The relationships for the variation in Poisson's ratio with confining pressure are not properly credited. (5) The discussers have analyzed 348 axial strain-radial strain curves for 39 different soils in compacted and undistrubed state in CD and UU tests which has 10 different Unified classifications ranging from Cobbe to CL and ML. Based upon this data, the hyperbolic model seems satisfactory.

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00099106
  • Record Type: Publication
  • Report/Paper Numbers: ASCE #11398 Proceeding
  • Files: TRIS
  • Created Date: Oct 18 1975 12:00AM