EVALUATION OF GAP-GRADED ASPHALT CONCRETE MIXTURES PART III: APPENDIX

THIS REPORT PRESENTS THE RESULTS OF A COMPARATIVE LABORATORY STUDY BETWEEN WELL- AND GAP-GRADED AGGREGATES USED IN ASPHALT CONCRETE PAVING MIXTURES. A TOTAL OF 424 BATCHES OF ASPHALT CONCRETE MIXTURES AND 3,960 MARSHALL AND HVEEM SPECIMENS WERE EXAMINED. THERE IS STRONG EVIDENCE FROM THIS INVESTIGATION THAT, WITH PROPER COMBINATIONS OF AGGREGATES AND ASPHALTS, BOTH CONTINUOUS- AND GAP-GRADED AGGREGATES CAN PRODUCE MIXTURES OF HIGH DENSITY AND OF QUALITIES MEETING CURRENT DESIGN CRITERIA. THERE IS ALSO REASON TO BELIEVE THAT THE UNQUALIFIED ACCEPTANCE OF SOME SUPPOSEDLY DESIRABLE, CONSTANT, MATHEMATICAL RELATIONSHIP BETWEEN ADJACENT PARTICLE SIZES OF THE FORM SUCH AS FULLER'S CURVE IS NOT JUSTIFIED. IT IS RECOMMENDED THAT THE AGGREGATE GRADING LIMITS BE RELAXED OR ELIMINATED AND THAT THE ACCEPTANCE OR REJECTION OF AN AGGREGATE FOR USE IN ASPHALT PAVEMENT BE BASED ON INDIVIDUAL MIXTURE EVALUATION. FURTHERMORE, BECAUSE OF THE POTENTIAL ATTRACTIVENESS OF GAP-GRADED ASPHALT CONCRETE IN COST, QUALITY, AND SKID AND WEAR RESISTANCE, SELECTED GAP-GRADED MIXTURES ARE RECOMMENDED FOR FURTHER TESTS BOTH IN THE LABORATORY AND IN THE FIELD, ESPECIALLY IN REGARD TO EASE OF COMPACTION AND SKID AND WEAR RESISTANCE.

  • Record URL:
  • Supplemental Notes:
    • Contract HR-157(ERI 9005) Rept No ISH-ERI-AMES-72251-3
  • Corporate Authors:

    Iowa State University, Ames

    2711 South Loop Drive
    Suite 4700
    Ames, IA  United States  50010-8664

    Eng Res Inst

    ,    
  • Authors:
    • Lee, D Y
    • David, H T
    • Mensing, R W
  • Publication Date: 1973-1

Media Info

  • Pagination: p. 75

Subject/Index Terms

Filing Info

  • Accession Number: 00210495
  • Record Type: Publication
  • Source Agency: Iowa State Highway Commission
  • Report/Paper Numbers: Final Rpt
  • Files: TRIS, STATEDOT
  • Created Date: May 24 2000 12:00AM