Asphalt hardening in three bituminous concrete top-course mixes was studied after storing at elevated temperatures for periods of 18 and 48 hours in inert gas, and 24 hours in a normal atmosphere. Asphalts extracted from loose mixes before and after storage, and from compacted mixes at the time of placement and after up to 7 years of service, were tested for penetration (77 F), absolute viscosity (140 F), and kinematic viscosity (275 F). The consistency of asphalt in the three mixes was not altered by storage, but delayed hardening was measured in one mix after 1 year of service, the second after 3 years, and the third after 6 years. These differences after once appearing have persisted but have not been reflected in pavement performance. The cause of the delayed hardening is unexplained. /FHWA/

  • Supplemental Notes:
    • Study Title: "Long-Term Effects of Bituminous Concrete Storage."
  • Corporate Authors:

    New York State Department of Transportation

    Engineering Research and Development Bureau, 1220 Washington Avenue
    Albany, NY  United States  12232

    Federal Highway Administration

    Engineering Research and Development Bureau, 1200 New Jersey Avenue, SE
    Washington, DC  United States  20590
  • Authors:
    • Miller, R W
    • Dodge, K S
  • Publication Date: 1979-10

Media Info

  • Pagination: 19 p.
  • Serial:
    • Issue Number: 83-2

Subject/Index Terms

Filing Info

  • Accession Number: 00303421
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: FHWA-NY-SR-79-65 Spec Rpt.
  • Created Date: Mar 31 1980 12:00AM