DESIGN CONSIDERATIONS FOR ASPHALT PAVEMENTS

PAVEMENT DESIGN WITHIN A SYSTEMS FRAMEWORK IS CONSIDERED. THE OUTLINES FOR A NUMBER OF SUBSYSTEMS WHICH CAN BE DEVELOPED TO EXAMINE SPECIFIC DISTRESS MODES INCLUDE: FATIGUE IN THE ASPHALT BOUND LAYER (RUPTURE), PERMANENT DEFORMATION IN THE PAVEMENT STRUCTURE (DISTORTION), AND FRACTURE DUE TO STRESSES RESULTING FROM BRAKING AND ACCELERATION (RUPTURE) OR DUE TO THERMAL STRESSES (RUPTURE). RESISTANCE TO RUPTURE CAUSED BY FATIGUE AND BY BRAKING AND ACCELERATING STRESSES AND RESISTANCE TO PERMANENT DEFORMATION ARE EXAMINED IN SOME DETAIL. THE INFLUENCE OF MIXTURE VARIABLES ON THESE LOADING SITUATIONS IS SUMMARIZED, WITH EMPHASIS PLACED ON MIXTURE STIFFNESS, FATIGUE RESISTANCE, FRACTURE CHARACTERISTICS, AND RESISTANCE TO PERMANENT DEFORMATION, ALTHOUGH OTHER MIX CHARACTERISTICS SUCH AS THERMAL PROPERTIES AND DURABILITY CHARACTERISTICS ARE BRIEFLY SUMMARIZED, SINCE THESE DATA ENTER INTO THE SOLUTION OF THE SYSTEMS WHICH HAVE BEEN FORMULATED. ASPHALT MIXTURE DESIGN MUST BE RELATED TO ITS ROLE IN THE OVERALL PAVEMENT STRUCTURE SINCE THE OTHER COMPONENTS OF THE STRUCTURE HAVE A SIGNIFICANT INFLUENCE ON THE RESPONSE OF THE MIXTURE TO THE INPUT VARIABLES SUCH AS LOADING AND ENVIRONMENT. THE EFFECTS OF CONSTRUCTION ARE CONSIDERED, AND IT IS EMPHASIZED THAT CAREFUL ATTENTION MUST BE GIVEN TO PLACEMENT OF THE ASPHALT MIXTURE TO ENSURE THAT IT WILL FULFILL ITS ROLE IN CONTRIBUTING TO PROPER PAVEMENT PERFORMANCE. FINALLY, A BRIEF DESIGN EXAMPLE IS PRESENTED ILLUSTRATING USE OF A WORKING SUBSYSTEM TO CONSIDER THE FATIGUE MODE OF DISTRESS FOR A THICK ASPHALT CONCRETE PAVEMENT SECTION. AVAILABLE THEORY IS USED WHERE POSSIBLE TO ASSIST IN THE ANALYSIS OF MIXTURES AND PAVEMENT STRUCTURES TO BOTH THE EFFECTS OF TRAFFIC LOADING AND ENVIRONMENT. /RRL(A)/

  • Supplemental Notes:
    • 66 Pp, 49 FIG, 14 TAB, 67 REF
  • Corporate Authors:

    Conf Asphalt Pavements Proc /S Africa

    ,    
  • Authors:
    • Monismith, C L
  • Publication Date: 0

Subject/Index Terms

Filing Info

  • Accession Number: 00205668
  • Record Type: Publication
  • Source Agency: Road Research Laboratory /UK
  • Files: TRIS
  • Created Date: Jul 18 1971 12:00AM