Evaluation of Compaction Characteristics of Unbound Material Using Superpave Gyratory Compactor During Construction and Trafficking

The compaction characteristics of the unbound material underlying the flexible pavement have been found to be critical to the performance of the pavement structure. This is especially so for airport pavements subjected to heavy aircraft loads. From previous tests at the National Airport Pavement Test Facility (NAPTF), it was found that the subbase experienced excessive compaction during trafficking. This study focused on studying the compaction characteristics of the subbase material using the Superpave Gyratory Compactor (SGC) and correlating the measured performance with field performance data. Since the SGC has not been widely used for studying the performance of unbound material, the compaction characteristics in the Superpave Gyratory Test were calibrated to field compaction of the subbase material during construction at similar moisture contents. The field data collected includes density measurements with each pass of the roller during compaction and the deflection of the pavement structure during aircraft trafficking. This is correlated with the data from the SGC including changes in density with additional energy input and it was found that the SGC can be used as a suitable predictor of compaction characteristics of unbound material. This paper provides the airport pavement designers the efficacy of using the SGC as a means of evaluating the performance of unbound material during construction and trafficking.

Language

  • English

Media Info

  • Media Type: DVD
  • Features: Figures; Photos; References; Tables;
  • Pagination: 11p
  • Monograph Title: TRB 89th Annual Meeting Compendium of Papers DVD

Subject/Index Terms

Filing Info

  • Accession Number: 01151280
  • Record Type: Publication
  • Report/Paper Numbers: 10-1794
  • Files: TRIS, TRB
  • Created Date: Jan 25 2010 10:49AM