METHODS FOR PREDICTING MODULI AND FATIGUE LAWS OF BITUMINOUS ROAD MIXES UNDER REPEATED BENDING

The use of modern pavement design methods to prevent cracking necessitates, among other things, determining the moduli and fatigue laws in bending of the bituminous road mixes (base courses and wearing courses). These determinations are now possible, but they involve sophisticated experiments that are not well adapted to pratical purposes. The objective of this paper is to present an original contribution to the prediction of moduli and fatigue laws in sinusoidal bending (controlled stress tests) of bituminous mixes. The results obtained with a large variety of mixes having different bitumen, composition, and size distribution of the aggregates show that this prediction requires only the knowledge of the volumetric composition of the mix (aggregate volume content, bitumen volume content, and void content) and the knowledge of some characteristics of the bitumen used (asphaltene content and penetration). On the basis of the experimental results obtained, general formulas are presented to permit the prediction of the moduli and the fatigue law of a mix. Practical criteria for the selection of the bitumen are also proposed.

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 114-123
  • Monograph Title: Characteristics of and factors influencing bituminous materials and mixtures
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00095573
  • Record Type: Publication
  • ISBN: 0309023599
  • Report/Paper Numbers: #517
  • Files: TRIS, TRB
  • Created Date: Jul 2 1975 12:00AM