NEW ASPHALT TECHNOLOGY IMPROVES DURABILITY OF MISSOURI HIGHWAYS

Using a new asphalt specification, the Missouri Department of Transportation can select the right asphalt for each job. Asphalt binders, the glue that holds an asphalt mix together, must be stiff enough to withstand rutting in warmer weather and elastic enough to "give" during winter, when the pavement contracts. The new Superpave binder specification is a performance based specification. Superpave binders are designated with a "PG" (Performance Grade) rating such as PG58-28. The numbers represent the high and low grade temperatures variances. A Superpave binder is then selected based on the climate in which the pavement will be used and the amount of traffic it will bear.

• Corporate Authors:

  Federal Highway Administration

  SHRP Implementation Coordinator, HTA-3, 1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Publication Date: 1997

Language

• English

Media Info

• Features: Photos;
• Pagination: 2 p.
• Serial:
  • Road Savers
  • Publisher: Federal Highway Administration

Subject/Index Terms

• TRT Terms: Asphalt; Asphalt pavements; Bituminous binders; Paving materials; Shear tests; Temperature gradients; Tension tests
• Uncontrolled Terms: Direct tension tests; Performance grade
• Old TRIS Terms: Asphalt technology; Bending beam test; Paving mixtures
• Subject Areas: Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways;

Filing Info

• Accession Number: 00746604
• Record Type: Publication
• Report/Paper Numbers: FHWA-SA-96-045
• Files: TRIS, USDOT
• Created Date: Mar 26 1998 12:00AM