EVALUATION OF AGGREGATE DEGRADATION DUE TO LABORATORY COMPACTION AND IGNITION OVEN TESTING OF HMA

Recent developments in Hot Mix Asphalt (HMA) design and analysis have resulted in the introduction of new laboratory compaction and testing equipment. This newer equipment includes the Superpave Gyratory Compactor (SGC) and the National Center for Asphalt Technology (NCAT) ignition oven. Over the past five to seven years, the SGC and the ignition oven have improved and accelerated the compaction and testing capabilities of HMA laboratories throughout the US and abroad. However, some in the industry still express concerns regarding the degradation of aggregate during laboratory compaction and ignition oven testing. The objective of this study was to document the observed aggregate degradation resulting from SGC and NCAT ignition oven testing for common Tennessee Department of Transportation (TDOT) mixes. This observational study included HMA samples from over 20 paving projects in the state of Tennessee. The mixes tested in this study included both crushed limestone and river gravel. The results of this study suggest that there is no significant degradation of aggregate resulting from the SGC or the NCAT ignition oven in Tennessee. The results are presented herein for review and discussion.

• Supplemental Notes:
  • Full conference proceedings available on CD-ROM.
• Corporate Authors:

  University of Texas, Austin

  International Center for Aggregates Research, 3208 Red River
  Austin, TX  United States  78705-2650

  Texas A&M University, College Station

  Faculty Exchange Box H
  College Station, TX  United States  77843
• Authors:
  • Kiser, P V
  • Jackson, N M
• Conference:
  • International Center for Aggregates Research 8th Annual Symposium: Aggregates - Asphalt Concrete, Bases and Fines
  • Location: Denver, Colorado
  • Date: 2000-4-12 to 2000-4-14
• Publication Date: 2000

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: 13p

Subject/Index Terms

• TRT Terms: Aggregates; Asphalt; Compaction; Crushed limestone; Degradation (Thermodynamics); Gravel; Gyratory testing machines; Hot mix asphalt; Ignition; Laboratories; Ovens; Superpave; Testing
• Geographic Terms: Tennessee
• Subject Areas: Geotechnology; Highways; Materials; I31: Bituminous Binders and Materials; I36: Aggregates;

Filing Info

• Accession Number: 00981925
• Record Type: Publication
• Files: TRIS
• Created Date: Nov 21 2004 12:00AM