Hamburg (Immersion) Wheel Tracker

The only truly sinusoidal Hamburg wheel tracker on the market. Another representation of Cooper quality and attention to detail

The Hamburg type dual arm immersion wheel tracker is widely used to evaluate the resistance to rutting and moisture susceptibility of asphalt mixtures following either EN12697-22 or AASHTO-T324. The device was developed in the 1970’s by Esso A.G. of Hamburg, Germany. It was based on the TRL wheel tracker which is also now included in EN12697-22.
Originally the Hamburg test was used by the City of Hamburg to measure rutting susceptibility. The test was performed for 9,540 wheel passes at either 40 or 50°C. Water was used to obtain the required test temperature rather than air. The City of Hamburg later increased the number of wheel passes to 19,200 and found that some mixtures began to deteriorate from moisture damage. Greater than 10,000 wheel passes was generally needed to show the effects of moisture damage.
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, whilst the development of the rut is constantly monitored and recorded throughout the test.


  • EN 12697-22
  • AASHTO-T324
  • Other national standards where relevant
  • Key Features

  • Able to perform AASHTO-T324 and EN 12697-22
  • State of the art software which provides higher level users with options, and lab technicians ease of use
  • Advanced machine with 4 testing modes: Wet, wet heat, Dry and Dry heat (with optional heating hood)
  • A mechanical re-circulating water bath controls the temperature to within ± 0.5°C in a range of (20-75) ºC
  • Variable speed range between 15 and 30RPM
  • Two displacement transducers attached to the wheel support arms measure the depth of the ruts as they develop with a resolution of 0.01mm to a maximum rut depth of 50mm
  • 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 mould options including laboratory compacted and cores (AASHTO and EN)
  • UKAS Certificate supplied
  • Cooper is the world number one wheel tracker manufacturer

  • Key Uses

  • Investigation of resistance to rutting
  • Investigation of moisture susceptibility
  • Testing of laboratory compacted slabs
  • Testing of field cores
  • Production of creep slope, stripping inflection point and stripping slope

  • Software

  • User friendly, intuitive and reliable Windows™ software developed using LabVIEW™
  • Software allows two standard but fully customisable testing methods AASHTO-T324 and EN 12697-22
  • Full software control of arms individually at outset and completion of test
  • The operator is guided through every step of the test
  • Real-time display of current water temperature, specimen temperature and rut depth
  • Data is recorded to disk at regular intervals for further analysis
  • Software communicates with the Immersion wheel tracker via the USB interface
  • Utilities are included for transducer check, diagnostic routines and calibration
  • Excel import data output
  • Hamburg Immersion Wheel Tracker software

    Wheel Speed Variable up to 30 cycles (60 passes) per minute
    Wheel Load 700 ± 10 N
    Load Cell kN 250
    Mould Dimensions mm 305 x 305 and 305 x 400 (others available, please contact us or see accessories)
    Slab Thickness mm 50 – 100 (different thicknesses can be tested with spacers)
    Rut Depth Transducer Range mm 50
    Temperature Range 20 – 75 ºC
    Electrical Supply¹ 380-415 Volts 50Hz @ 16A
    Dimension mm (WxDxH) 1430 x 1380 x 1260
    Estimated Weight Kg 687
    PC Included

    ¹ others available upon

    Calibration & Maintenance

    Calibration, Annual Service and Maintenance Contracts are available for this device. Please enquire for further details. Note: This device should be checked and calibrated annually.

    Accessories are not included in the price of main device (unless stated otherwise) and may be purchased separately if required.

    Photo? N.A CRT-WTRCM-50SS
    Stainless Steel Mould 305 x 305 x 50mm depth
    Photo? N.A CRT-WTRCM-100SS
    Stainless Steel Moulds 305 x 305 x 100mm depth
    Photo? N.A CRT-RCM-50WSS
    Stainless Steel Moulds 400 x 305 x 50mm depth
    Photo? N.A CRT-RCM-100WSS
    Stainless Steel Moulds 400 x 305 x 100mm depth
    Photo? N.A CRT-WTIM-16050
    Stainless Steel Moulds 320 x 160 x 50mm depth
    Photo? N.A CRT-WTIM-160100
    Stainless Steel Moulds 320 x 160 x 100mm depth
    Photo? N.A CRT-WTIM-18050
    Stainless Steel Moulds 320 x 180 x 50mm depth
    Photo? N.A CRT-WTIM-180100
    Stainless Steel Moulds 320 x 180 x 100mm depth
    Photo? N.A CRT-WTIM-26050
    Stainless Steel Moulds 320 x 260 x50mm depth
    Photo? N.A CRT-WTIM-260100
    Stainless Steel Moulds 320 x 260 x100mm depth
    Photo? N.A CRT-WTIM-DIAM200
    Mould for 200 mm cores
    Photo? N.A CRT-WTIM-WHSS
    Stainless steel wheel for Immersion Wheel Tracker according to AASHTO-T324
    Photo? N.A CRT-CTM-SCB
    Semi Circular Beam Bending system to perform EN 12697-44
    Crack propagation and tensile strength
    Photo? N.A CRT-WTIM-WHR
    Rubberised Stainless steel wheel for Immersion Wheel Tracker according to EN 12697-22
    Photo? N.A CRT-WTIM-LIFT
    Mould lifting hoist
    Chiller cooling down to 20ºC
    Please complete the form below to download the datasheet