James Cox & Sons, Inc.

Hamburg Wet & Dry Wheel Tracker

The Hamburg type dual arm wheel tracker is widely used to evaluate the resistance to rutting and moisture susceptibility of asphalt mixtures following either AASHTO-T324, State standards or EN 12697-22. Specimens can be prepared in the laboratory, or cores taken from the road can be used. Loaded steel or rubber wheels track a sample under regulated load, speed and temperature, while the development of the rut is constantly monitored and recorded throughout the test.

  • Testing environment temperature can be set between ambient and 70 ºC (158 °F)
  • Four testing modes: wet, wet heat, dry and dry heat (with optional heating hood)
  • State of the art software provides higher level users with options, and lab technicians ease of use
  • Mechanical recirculating water bath controls the temperature to within ± 0.5°C (± 0.9°F)
  • Two displacement transducers attached to the wheel support arms measure the depth of the ruts as they develop with a resolution of 0.01 mm (0.0004 inch) to a maximum rut depth of 50 mm (2 inch)
  • The depth of the rut is measured automatically and constantly as specified in the AASHTO and EN standards
  • Rubber or stainless steel wheels, and various widths to alter the applied pressure
  • Various mold options including laboratory compacted and cores

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