AGGREGATE CHARACTERISTICS AFFECTING FRICTION NUMBERS ON BITUMINOUS PAVEMENTS IN ALABAMA. SUMMARY

The Alabama Highway Department makes pavement friction measurements on all roads in the state approximately every two years. These measurements are an indication of the ability of the pavement to resist skidding. More than 10,000 miles of asphalt pavement are tested during each cycle. The friction results vary considerably. It is obvious that some pavements maintain high resistance over a period of many years, while friction diminishes rapidly on others. A research project was needed to help determine why friction varied from location to location. In particular, the roles of key variables (aggregate size, type, and mix; traffic volume; age; etc.) were not well defined. The abundance of friction data provided a good tool with which to assess the contributions of these variables. If the specific effects of each variable could be defined through research, the Alabama Highway Department could design long lasting pavement for all locations and situations.

• Corporate Authors:

  University of Alabama, Tuscaloosa

  Department of Civil Engineering, P.O. Box 870205
  Tuscaloosa, AL  United States  35487-0205

  Alabama State Highway Department

  Bureau of Materials and Tests, 1409 Coliseum Blvd
  Montgomery, AL  United States  36130

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Turner, D S
  • Keating, J L
  • Mansfield, E R
• Publication Date: 1985-6

Media Info

• Pagination: 12 p.

Subject/Index Terms

• TRT Terms: Aggregates; Bituminous pavements; Friction; Pavement design; Skid resistance; Variables
• Uncontrolled Terms: Aggregate size; Friction index
• Old TRIS Terms: Aggregate characteristics
• Subject Areas: Design; Geotechnology; Highways; Pavements; I22: Design of Pavements, Railways and Guideways; I23: Properties of Road Surfaces; I36: Aggregates;

Filing Info

• Accession Number: 00481029
• Record Type: Publication
• Report/Paper Numbers: FHWA/AL-104A/88, HPR 104A
• Contract Numbers: 930-110
• Files: TRIS, USDOT, STATEDOT
• Created Date: Mar 31 1989 12:00AM