U.S. flag An official website of the United States government.
Official websites use .gov

A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS

A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

i

Additional asphalt to increase the durability of Virginia's superpave surface mixes.

File Language:
English


Details

  • Creators:
    Maupin, G. W
  • Corporate Creators:
  • Subject/TRT Terms:
  • Publication/ Report Number:
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Virginia
  • Edition:
    Final report.Aug. 2002June 2003.
  • Corporate Publisher:
    Virginia Transportation Research Council (VTRC)
  • Abstract:
    Although Superpave has been successful in preventing rutting, many believe that the design asphalt content needs fine-tuning to produce durable mixes. This investigation used various laboratory tests to test samples of field surface mixes (12.5 mm and 9.5 mm) to predict changes in mix properties as extra asphalt was added. Permeability, 50-blow Marshall volumetrics, rutting, and fatigue tests were used. An analysis tool using gyratory compaction was also used to predict what the level of pavement voids would have been had higher asphalt contents been used. For most of the mixes, properties improved as the asphalt content was increased. The asphalt content could have been increased as much as 0.5 percent in most of the mixes with no harmful effects. It is reasonable to expect that the beneficial effects would increase the life of a surface mix by approximately 5 percent. The Virginia Department of Transportation (VDOT) uses approximately 2 million tons of asphalt in surface overlays per year at a cost of approximately $35 per ton. The cost of adding 0.5 percent more asphalt would be approximately $1 per ton. With an estimated increased service life of 5 percent, VDOT would save approximately $1 .5 million per year. The researcher recommended that the effects of increasing the design asphalt content of Superpave mixes be explored and tested in the field.
  • Format:
    PDF
  • Collection(s):
  • Main Document Checksum:
    urn:sha256:a175d7e3383fe3688dbca907931aaa5148a1bccbc0a5283be8900d3e41f7428e
  • Download URL:
  • File Type:
    Filetype[PDF - 371.40 KB ]
PREVIOUS
File Language:
English
ON THIS PAGE
Details
ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners. As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.
BACK TO TOP