Evaluation of Gyratory Stability for Hveem-Designed Mixes

The main goal of this study was to evaluate the potential of using the gyratory compaction forces and deformation to measure the aggregate structure stability in hot mix asphalt (HMA) during the mix design process. This method is intended as a screening tool to identify aggregate structures that have low resistance to applied forces prior to conducting further performance testing. The measured compaction shear forces and deformation of a wide spectrum of hot mix asphalt (HMA) mixtures were used to calculate a stability index referred to as the Gyratory Stability (GS). Using forty seven Hveem-designed mixes in Idaho, the GS values of these mixes were compared to their Hveem Stability (HS) values. In addition, the aggregate used in these mixes was evaluated using the Aggregate Imaging System (AIMS), and the texture results were compared to the GS values. The results indicated reasonable correlation between GS values and the HS values for all tested field mixes. Reasonable correlation was found between aggregate texture and the GS. Overall, the results indicate that the GS has the potential to be used as a screening tool for HMA design, especially to decide upon the acceptance of the mix aggregate structure during the mix design process.

Language

  • English

Media Info

  • Media Type: CD-ROM
  • Features: Figures; References; Tables;
  • Pagination: 17p
  • Monograph Title: TRB 86th Annual Meeting Compendium of Papers CD-ROM

Subject/Index Terms

Filing Info

  • Accession Number: 01044232
  • Record Type: Publication
  • Report/Paper Numbers: 07-1704
  • Files: TRIS, TRB
  • Created Date: Feb 8 2007 6:23PM