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Selection and evaluation of performance-graded asphalt binders for Virginia.
  • Published Date:
    1999-06-01
  • Language:
    English
Filetype[PDF-2.29 MB]


Details:
  • Creators:
  • Publication/ Report Number:
    VTRC 99-R21
  • Resource Type:
  • Geographical Coverage:
  • TRIS Online Accession Number:
    769486
  • OCLC Number:
    41867845
  • Edition:
    Final report 6/94-6/99
  • NTL Classification:
    NTL-HIGHWAY/ROAD TRANSPORTATION-HIGHWAY/ROAD TRANSPORTATION ; NTL-HIGHWAY/ROAD TRANSPORTATION-Materials ; NTL-HIGHWAY/ROAD TRANSPORTATION-Pavement Management and Performance
  • Format:
  • Abstract:
    This study recommended performance-graded (PG) binders to be used in hot-mix asphalt in Virginia. Ten conventional viscosity-graded asphalt cements, representing the asphalt typically available in Virginia, were graded under the PG system to develop a cross-reference with the new system. Based on the past performance of the viscosity-graded asphalt and the PG binder testing, PG 64-22 was selected as the base grade of asphalt for Virginia. Laboratory studies were performed with the Georgia loaded-wheel tester and asphalt pavement analyzer to evaluate the practice of increasing the high-temperature binder grade for heavy or slow-moving traffic. Based on the success of these studies and field trials sections, two new mix types, SM-2D and SM-2E, both 50-blow Marshall mixes using PG 70-22 and PG 76-22 binders, respectively, were developed. The lower laboratory compaction effort will increase the asphalt content for durability, and the stiffer binder will prevent rutting. A large database of field rut-depth data was developed for Virginia Department of Transportation surface mixes with the asphalt pavement analyzer. The data were used to estimate maximum rut-depth criteria for quality assurance testing and the evaluation of future asphalt mix designs, binders, and stabilizers.

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