SOME APPLICATIONS OF THEORY IN THE DESIGN OF ASPHALT PAVEMENTS

RECENTLY ATTEMPTS HAVE BEEN MADE TO FORMULATE, IN A SYSTEMATIC MANNER, PAVEMENT DESIGN SYSTEMS WHICH BRING TOGETHER THE ESSENTIAL OBSERVED FEATURES OF PAVEMENT PERFORMANCE AS A PART OF THE DEVELOPMENT OF IMPROVED METHODS OF PAVEMENT DESIGN, METHODS WHICH EVENTUALLY MAY HAVE THE CAPABILITY TO: (1) ACCOMODATE THE EVERCHANGING REQUIREMENTS OF LOADING; (2) BETTER UTILIZE AVAILABLE MATERIALS; (3) ACCOMODATE NEW MATERIALS WHICH MIGHT BE DEVELOPED; AND (4) BETTER DEFINE THE ROLE OF CONSTRUCTION. A METHOD WHICH HAS THE POTENTIAL TO ASSIST IN ACHIEVING IMPROVED DESIGN PROCEDURES IS TO DEVELOP A SERIES OF SUBSYSTEMS, THE GOAL OF EACH OF WHICH IS TO MINIMIZE A PARTICULAR FORM OF DISTRESS. ALTERNATIVELY, AS IS DONE IN STRUCTURAL DESIGN, THE PAVEMENT STRUCTURE MAY BE SELECTED TO MINIMIZE A PARTICULAR MODE OF DISTRESS AND CHECKED TO INSURE THAT OTHERS DO NOT OCCUR OR ARE THEMSELVES MINIMAL. IF THE POTENTIAL FOR OTHER FORMS OF DISTRESS EXIST (TO AN INTOLERABLE DEGREE), THEN THE DESIGN CAN BE MODIFIED TO PRECLUDE OR REDUCE THEIR EFFECTS. INITIALLY THIS MAY WELL BE THE APPROACH ADOPTED UNTIL MORE INFORMATION CAN BE DEVELOPED REGARDING THE WEIGHTING FACTORS. IT IS THE PURPOSE OF THIS PAPER TO OUTLINE A FEW SUBSYSTEMS WHICH CAN BE DEVELOPED AT THIS STAGE IN TIME USING AVAILABLE INFORMATION. SUBSYSTEMS TO EXAMINE SPECIFIC DISTRESS MODES INCLUDE: FATIGUE IN THE ASPHALT BOUND LAYER (RUPTURE) DUE TO REPETITIVE TRAFFIC LOADING, PERMANENT DEFORMATION IN THE PAVEMENT STRUCTURE (DISTORTION, AND FRACTURE (RUPTURE) DUE TO STRESSES RESULTING FROM BRAKING AND ACCELERATION FORCES OR DUE TO THERMAL STRESSES. IN EACH OF THE CASES EXAMINED, CONSIDERATION IS GIVEN TO MATERIAL CHARACTERISTICS WHICH PERMIT THE ASPHALT PAVING MIXTURE TO BE EXAMINED RELATIVE TO ITS ROLE IN THE PAVEMENT STRUCTURE. SUCH CONSIDERATION PERMITS AN IMPROVED UNDERSTANDING OF THE ROLE OF MIXTURE DESIGN IN PAVEMENT DESIGN. /AUTHOR/

  • Supplemental Notes:
    • Eng Rept No 33, PP IV-1-IV-53, 39 FIG, 10 TAB, 63 REF
  • Corporate Authors:

    Proc 5th Ann Nevada Street & Hwy Conf

    ,    
  • Authors:
    • Monismith, C L
  • Publication Date: 1970-3

Subject/Index Terms

Filing Info

  • Accession Number: 00205941
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 20 1971 12:00AM