WEALTH OF INFORMATION PRESENTED AT SUPERPAVE CONFERENCE

At the "Superpave: Today and Tomorrow" conference, held April 21-23, 1998, in St. Louis, Missouri, the latest news on trends and technology related to Superpave, the high-performance asphalt pavement mix design system, were reported. Some of the most valuable and timely information that was exchanged at the conference was related to field construction. Superpave mixes can require a greater level of compactive effort. The mysterious "tender zone," a temperature zone (generally 93-116 deg C) in which some mixes become unstable, was discussed a great deal. The tender zone phenomenon seems to be related to ambient temperatures, and in some areas of the country, it has not been a problem at all. Use of recycled asphalt pavement in Superpave is becoming more commonplace. Permeability problems have emerged on some Superpave projects as well, most notably in northwest Florida, where the available aggregates make mixes more susceptible to this problem. Recommended solutions include high inplace densities with strict density-monitoring specifications, well-sealed longitudinal joints, and thicker lifts.

• Record URL:
  • http://www.fhwa.dot.gov/publications/publicroads/98may/wealth.cfm
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/1586080
• Corporate Authors:

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Smith, K H
• Publication Date: 1998-5

Language

• English

Media Info

• Features: Photos;
• Pagination: p. 7-8
• Serial:
  • Public Roads
  • Volume: 61
  • Issue Number: 6
  • Publisher: Federal Highway Administration
  • ISSN: 0033-3735
  • Serial URL: https://www.fhwa.dot.gov/publications/publicroads/
• Publication flags:

  Open Access (libre)

Subject/Index Terms

• TRT Terms: Aggregates; Asphalt pavements; Compaction; Conferences; Density; Mix design; Pavement performance; Pavements; Paving; Performance; Permeability; Recycling; Superpave; Technology; Trend (Statistics)
• Uncontrolled Terms: High performance
• Old TRIS Terms: Recycled pavements
• Subject Areas: Design; Geotechnology; Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 00753192
• Record Type: Publication
• Files: TRIS, USDOT
• Created Date: Sep 6 1998 12:00AM