EVALUATION OF THE EFFECT OF GRADATION OF AGGREGATE ON RUTTING CHARACTERISTICS OF ASPHALT MIXES. FINAL REPORT

Segregation of asphalt mixtures has become a serious problem on coarse base mixes when they are improperly handled. One method to minimize segregation is to increase the fine aggregate portion. However, this may potentially adversely affect rutting resistance of the asphalt mixture. The objective of this study was to evaluate the effect of mix gradations on the rutting resistance of asphalt mixes. Six gradations from three aggregate sources were used in this study. Rutting was measured in the laboratory using the loaded wheel tester. Both standard and modified mixes were tested. Results from this study indicated that some modified mixes can improve rutting resistance and that aggregate sources can significantly affect the rutting potential of asphalt mixtures.

• Corporate Authors:

  University of Georgia, Experiment

  Georgia Experiment Station
  Experiment, GA  United States 

  Georgia Department of Transportation

  One Georgia Center
  600 West Peachtree Street, NW
  Atlanta, GA  United States  30308

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Lai, J S
• Publication Date: 1988-8

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: 40 p.

Subject/Index Terms

• TRT Terms: Aggregate gradation; Aggregates by source; Asphalt mixtures; Laboratory tests; Ruts (Pavements)
• Uncontrolled Terms: Aggregate sources; Rut
• Subject Areas: Geotechnology; Highways; Materials; I31: Bituminous Binders and Materials; I36: Aggregates;

Filing Info

• Accession Number: 00479250
• Record Type: Publication
• Report/Paper Numbers: FHWA-GA-88-8706, RP 8706
• Files: TRIS, USDOT, STATEDOT
• Created Date: Jan 31 1989 12:00AM