FATIGUE BEHAVIOR OF CONVENTIONAL AND RATIONALLY DESIGNED BITUMINOUS MIXES ON SIMULATED SUBGRADE

Three dense bituminous mixes were designed by a method that takes into consideration the shape, size, size distribution, and surface texture of mineral aggregates and boundary condition of the mold. Laboratory investigation into the fatigue properties of these mixes were carried out on slab specimens having a thickness of the same order of the wearing course. A simulated subgrade, based on the Westergaard assumption, was designed to support the slab specimens subjected to a constant nonreversed stress type of loading. The effect of variables such as the binder content, shape of coarse aggregate, rate of deformation, and initial vertical deflection on the fatigue life of slab specimens was investigated. Life of the mixes can be predicted from either the initial deflection of the specimen, the rate of increase in this deflection, or both. Fatigue life correlated very well with these two variables combined. The experimental results showed that the fatigue strength of the three rationally designed mixes was superior to that of the B.S. 594 wearing course mix made of the same type of stone.

Media Info

  • Media Type: Print
  • Features: Figures; References;
  • Pagination: pp 15-25
  • Monograph Title: Bituminous mixtures, aggregates, and pavements
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00129483
  • Record Type: Publication
  • ISBN: 0309024544
  • Files: TRIS, TRB
  • Created Date: Mar 10 1976 12:00AM