IMPACT OF AGGREGATE GRADATION AND TYPE ON ASPHALT MIXTURE CHARACTERISTICS. FINAL REPORT

This report addresses the impact of aggregate gradation and type on Hot Mix Asphaltic Concrete (HMAC) characteristics. Several different, but related, topics are covered, and results from several experiments are presented. An overview of HMAC is presented, covering factors affecting mixture characteristics and performance in addition to a review of the literature relating to aggregate gradation and type. The results of a study of construction data from the Texas State Department of Highways and Public Transportation (SDHPT) are presented. Two laboratory studies were conducted relating to asphalt content, aggregate gradation, and aggregate type. The summarized results and interpretations of these results are included. The economic impact of specification changes currently proposed by the SDHPT to improve HMAC quality is addressed. Finally, conclusions and recommendations are drawn based on all preceding material.

• Supplemental Notes:
  • Research study title: Impact of Aggregate Gradation and Type on Asphalt Mixture Characteristics.
• Corporate Authors:

  University of Texas, Austin

  Center for Transportation Research, 3208 Red River Street
  Austin, TX  United States  78705

  Texas Department of Transportation

  Transportation Planning Division, P.O. Box 5051
  Austin, TX  United States  78763

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Hazlett, D G
  • Kennedy, T W
• Publication Date: 1990-11

Language

• English

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: 106 p.

Subject/Index Terms

• TRT Terms: Aggregate gradation; Aggregates; Asphalt content; Economic impacts; Field studies; Guides to the literature; Hot mix asphalt; Laboratory tests; Literature reviews; Performance; Recommendations; Specifications
• Uncontrolled Terms: Field data
• Old TRIS Terms: Aggregate characteristics; Changes; Test results
• Subject Areas: Economics; Geotechnology; Highways; Materials; Research; I31: Bituminous Binders and Materials; I36: Aggregates;

Filing Info

• Accession Number: 00625037
• Record Type: Publication
• Report/Paper Numbers: FHWA/TX-91+1158-1F, Res Rept 1158-1F, CTR 3-9-88-1158-1F
• Contract Numbers: FHWA/TX-91+1158-1F
• Files: TRIS, USDOT, STATEDOT
• Created Date: Oct 5 1993 12:00AM