An attempt is made to show that it is possible to characterize the permanent deformation behavior of pavement materials, and that a simple computer program may be used to predict the amount of rutting that will occur in a pavement. The creep bahavior of a glacial till (Dublin boulder clay) and a road-base material (dense bitumen macadam) was studied. An equation is given which illustrates the form of increase of strain and stress and number of load applications for the two materials. The relation linking the permanent strain behavior of a dense bitumen macadam in dynamic and static laboratory creep tests is suggested. It is shown that the permanent deformation results of dynamic tests may be predicted by static tests in which the stress levels are set at therms values of the stress pulse of the dynamic tests. A finite-element program has been adapted to give the stresses, elastic strains, and permanent change in surface profile in a 4-layer road pavement due to the passage of rolling wheel loads. The computer program, DEFPAV (described in the paper), may incorporate up to 8 creep laws, any one of which may be used to describe the creep of a certain layer.

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 31-33
  • Monograph Title: Soil mechanics: rutting in asphalt pavements, embankments on varved clays and foundations
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00162993
  • Record Type: Publication
  • ISBN: 0309025958
  • Files: TRIS, TRB
  • Created Date: Oct 13 1977 12:00AM