Laboratory Repeatability of the Hamburg Wheel-Tracking Device and Similar Wheel-Tracking Devices

The objective of this research was to assess the repeatability of hot mix asphalt concrete (HMAC) moisture susceptibility testing using the Hamburg wheel-tracking device and similar equipment. The tests were performed round-robin-style among seven laboratories. The seven participants were the University of Arkansas, the Colorado Department of Transportation (CDOT), the Federal Highway Administration (FHWA), Koch Materials Company, Superfos Construction, Inc., and Utah Department of Transportation (UTDOT). All the steel-wheeled devices showed very good repeatability during testing of the polymer-modified asphalt gravel mixture; however, the repeatability was poor during testing of the limestone aggregate mixture. There was less variation within the data collected for Helmut Wind manufactured devices compared to the amount of variation from all the wheel-tracking devices. Cylindrical test specimens fabricated with a Superpave gyratory compactor can be used in place of the rectangular slab test specimens. The use of rubber wheels for wheel-track testing produced different test results compared to the results from steel wheel tracking devices. No standard test procedure exists for the Hamburg wheel-tracking device, so the amounts of variation caused by operator error and other sources of error are unknown.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References; Tables;
  • Pagination: 22p

Subject/Index Terms

Filing Info

  • Accession Number: 01642607
  • Record Type: Publication
  • Report/Paper Numbers: DHT-44
  • Files: NTL, TRIS, ATRI, STATEDOT
  • Created Date: Jul 14 2017 12:13PM