Asphalt Wheel Tracker
HWTT-100 Hamburg Wheel Tracking Tester

  • Meets AASHTO T 324 standard
  • Accommodates cylindrical or slab specimens.
  • Software for automatic determination of Stripping Inflection Point (SIP), number of passes to SIP, number of passes to failure Nf and other calculated parameters
  • Stainless steel construction with temperature controlled water bath up to 70 °C
  • Available Superpave Gyratory Compactor GRC-20 for specimen compaction


The GCTS HWTT-100 Hamburg Wheel-Tracking Tester is used to test submerged, compacted Hot Mix or Warm Mix Asphalt specimens as per AASHTO T 324 standard. The device consists of a reciprocating wheel that is rolled over the specimens while measuring the rate of permanent deformation. 


A constant load of 705 N ±4.5 N is applied to the specimens with a sinusoidal wheel speed of 1 ft/sec in a constant temperature controlled water bath up to 70 °C (± 1.0 °C). An LVDT jig is used for continuous measurement of permanent deformation along the path of the rolling wheel.


  • 705 N constant load
  • Temperature control to 70°C


Please contact GCTS for full specifications.