Rutting Behavior of NCAT Pavement Test Track Superpave Asphalt Mixes Analyzed For Aggregate Morphology Effects

The National Center for Asphalt Technology (NCAT) Pavement Test Track study findings were utilized in this paper to investigate key factors affecting the rutting behavior of various Superpave asphalt mixes such as the asphalt content, asphalt binder, as-built pavement air voids, and aggregate shape properties. Rut depths developed primarily in the asphalt courses of the 29 NCAT Test Track Superpave asphalt concrete (AC) sections were collected using a three-laser road profiler system after nearly 90% of the targeted 10 million equivalent single axle wheel loads were applied. Considering the significant influence of temperature on the asphalt binder materials during rut development, asphalt content and binder properties of the 29 Superpave AC sections were studied first. Binder stiffness related to its high temperature grade and binder content was found to significantly affect the permanent deformations measured in the AC courses. Two key coarse aggregate morphological properties, the angularity and surface texture as quantified by an Angularity Index (AI) and a Surface Texture (ST) index using the University of Illinois Aggregate Image Analyzer (UIAIA), were found to improve the correlations of the asphalt content and binder properties with the rut development. The as-built air voids content was also considered as a factor controlling the one-dimensional densification of the asphalt mixes. When the field compaction level as indicated by the as-built air voids was included in the correlations, a better overall rutting trend was established together with the asphalt content, binder properties and especially the surface texture property represented by ST index of the coarse aggregate.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/02702932
• Supplemental Notes:
  • This paper is only available on the CD-ROM located in the back of the hardcopy volume.
• Authors:
  • Pan, Tongyan
  • Tutumluer, Erol
  • Carpenter, Samuel
• Conference:
  • 2006 Journal of the Association of Asphalt Paving Technologists: From the Proceedings of the Technical Sessions
  • Location: Savannah Georgia, United States
  • Date: 2006-3-27 to 2006-3-29
• Publication Date: 2006

Language

• English

Media Info

• Media Type: CD-ROM
• Features: Figures; References; Tables;
• Pagination: pp 1169-1194
• Serial:
  • Journal of the Association of Asphalt Paving Technologists
  • Volume: 75
  • Publisher: Association of Asphalt Paving Technologists (AAPT)
  • ISSN: 0270-2932
  • Serial URL: https://www.asphalttechnology.org/site_page.cfm?pk_association_webpage_menu=9169&pk_association_webpage=19109

Subject/Index Terms

• TRT Terms: Aggregates; Air voids; Angularity; Asphalt concrete; Asphalt content; Asphalt mixtures; Bituminous binders; Coarse aggregates; Compaction; Densification; Equivalent single axle loads; Morphology; Rutting; Shape; Stiffness; Superpave; Temperature; Test tracks; Texture; Wheel loads
• Uncontrolled Terms: Pavement testing; Permanent deformation
• Subject Areas: Geotechnology; Highways; Materials; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01041401
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 30 2007 1:29PM