Establishment of the Precision of the Dynamic Angle Validation (DAV) Kit with Hot-Mix Simulator (HMS) for Superpave Gyratory Compactor

Superpave hot-mix asphalt (HMA) specimens are compacted in the laboratory using the Superpave gyratory compactor (SGC) through the application of pressure and an applied angle of gyration. The original compaction specification for the SGC requires the angle of gyration to be 22+/-0.35 mrad (1.25+/-0.02 degrees), measured externally to the compaction mold. Questions concerning the ability of different compactors to produce HMA specimens of the same mix having the same density led to the development of the Dynamic Angle Validation (DAV) kit, which measures the angle of gyration internally (on the inside of the mold). The DAV procedure requires the use of HMA to measure the internal angle of gyration. Due to practical limitations of performing measurements using HMA and questions concerning the "proper" HMA mix to use in the measurements, a companion device - the Hot-Mix Simulator (HMS) - was introduced which effectively simulates the load placed on the SGC by a hot-mix asphalt specimen. An interlaboratory study was conducted in accordance with ASTM E691-99 to establish the precision of the internal angle measurement provided by the DAV/HMS combination. A total of eleven DAV/HMS units and five SGC models were included in the study. Based on the study data, estimates were developed of both repeatability (within lab) and reproducibility (between lab) for the DAV/HMS for all five SGC models. For the covering abstarct of this conference see ITRD number E215163. (A)

• Corporate Authors:

  International Society for Asphalt Pavements

  4711 Clark Avenue, Suite G
  White Bear Lake, MN  United States  55110
• Authors:
  • Hall, K
  • EASLEY, T
• Conference:
  • 10TH INTERNATIONAL CONFERENCE ON ASPHALT PAVEMENTS - AUGUST 12 TO 17, 2006, QUEBEC CITY, CANADA
• Publication Date: 2006

Language

• English

Media Info

• Media Type: Print
• Pagination: p. vol1,86-94
• Monograph Title: 10th International Conference on Asphalt Pavements - August 12 to 17, 2006, Quebec City, Canada

Subject/Index Terms

• TRT Terms: Angularity; Calibration; Compactors; Conferences; Hot coated materials
• Uncontrolled Terms: Angles; Gyratory compactors; Internal
• Geographic Terms: Canada
• Subject Areas: Design; Materials; Pavements; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01084461
• Record Type: Publication
• Source Agency: Transportation Association of Canada (TAC)
• Files: TAC
• Created Date: Jan 16 2008 9:08AM