EVALUATION OF INCREASED TRUCK SIZE AND MASS ON PAVEMENT LIFE AND DESIGN THICKNESS

The results are presented of an analytical study that evaluated the effects of increased vehicle size and mass on pavement life and thickness. The techniques are applicable primarily to relatively new or reconstructed pavements; however, an approach is also presented that shows how they can be used to evaluate the effect on pavements that have been in service for several years. An increase in legal single-axle loads from 80 to 110 kN (18,000 to 24,000 lbf/sq in. (18 to 24 kips)) or in tandem-axle loads from 140 to 200 kN (32,000 to 44,000 lbf/sq in. (32 to 44 kips)), could result in a loss of pavement life of up to 80 percent if applied to the existing system. The incremental thickness for new construction or reconstruction associated with the heavier trucks would require a maximum of 65 mm (2.5 in.) of surfacing material. Truck configuration can also substantially affect the number of equivalent 80-kN axle loadings. The incremental thickness for new or reconstructed pavements associated with the different truck configurations can amount to approximately 40 mm (1.5 in.) of surfacing material. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 46-53
  • Monograph Title: Analysis of pavement systems
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00193380
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: May 11 1979 12:00AM