CYCLIC CREEP OF BITUMINOUS MATERIALS UNDER TRANSIENT, HIGH-VOLUME LOADS

Flexible pavements should be designed to limit the permanent deformation after a given number of load applications to some tolerable value. To accomplish this, the designer should be able to estimate the actual magnitude of permanent deformation for any particular design situation. The necessary predictive models for such cyclic creep should consider material characteristic; layer thicknesses; temperature; rate, intensity, and repetitions of loading; and any significant interactions of these factors. This paper presents an approach to developing cyclic creep models based on simulating field conditions in the laboratory. Equipment that can apply dynamic stresses under varying temperature conditions and that can measure accumulated permanent strains is described. The development of cyclic creep models that use data obtained from statistically designed experimental programs is described. They can be used to separately estimate permanent deformation in the compression and tension zones of a bituminous layer. The models were applied to the full-depth sections of the Bampton Test Road. Very good agreement was found between predicted and measured values of accumulated permanent deformation.

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 1-14
  • Monograph Title: Bituminous mixtures, aggregates, and pavements
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00129482
  • Record Type: Publication
  • ISBN: 0309024544
  • Files: TRIS, TRB
  • Created Date: Mar 10 1976 12:00AM