Ballast materials were tested in the triaxial apparatus by using a repeated deviator stress and a constant confining pressure. Permanent deformation (plastic) characteristics at several stress levels were determined for a variety of types and gradations of material. Correlation analyses were made between the plastic response and the results of standard material-characterization tests. The results indicate that the most important factor influencing the repeated-load plastic-strain behavior of ballast is the degree of compaction. The stress level was also found to be an important factor; there was some indication that permanent deformation was less for the more nearly well graded specimens. Finally, unlike the resilient response, the permanent-deformation behavior of ballast is dependent on loading history.

Media Info

  • Media Type: Print
  • Features: References; Tables;
  • Pagination: pp 47-53
  • Monograph Title: Railroad track and electrification studies
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00300674
  • Record Type: Publication
  • ISBN: 030902840X
  • Files: TRIS, TRB
  • Created Date: Sep 29 1979 12:00AM