Wheel Tracker Small Devices – 1 & 2 Arms


Product code: CRT-WTEN1/2/AUS

Wheel Tracker Small Devices – 1 & 2 Arms

The CRT-WTEN1 and CRT-WTEN2 are supplied with a UKAS certificate of accreditation validating conformance to EN 13108

Wheel tracking is used to assess the resistance to rutting of asphaltic materials under conditions which simulate the effect of traffic. A loaded wheel tracks a sample under specified conditions of load, speed and temperature while the development of the rut is monitored continuously during the test. Test specimens can be either slabs prepared with a laboratory compactor or 200mm Ø cores cut from the highway.
The CRT-WTEN1 wheel tracker performs both procedures A and B specified for the small scale device in EN 12697-22. Procedure A requires that six specimens are tested. For procedure B only two specimens need to be tested, but rut depth must be measured at more points along the longitudinal rut profile. To speed up the testing process the CRT-WTEN2 was designed to test two specimens simultaneously.


  • EN 12697-22 Small device
  • AST 01:2004
  • BS 598-110:1998
  • Key Features

  • Tests materials for roads with axle loads up to 13 tonnes
  • Rigid test frame built from extruded aluminium section
  • Integral temperature controlled cabinet with double glazed doors
  • PID control of test temperature in the range 40°C to 62°C
  • Rack for pre-test temperature conditioning of specimens
  • The CRT-WTEN2 tests two specimens simultaneously
  • Specimens compacted with the Cooper Technology Roller
  • Compactor can be transferred directly to the wheel tracker without de-moulding
  • Closed-loop speed control
  • User-friendly Windows™ software
  • Supplied with certification of a UKAS accredited calibration

  • Key Use

  • Determination of the rut resistance of asphaltic paving materials

  • Software

  • User friendly, intuitive and reliable Windows™ software developed using LabVIEW™
  • Software is designed to perform EN 12697-22 Small device
  • Software automatically starts the wheel tracker, maintaining the speed at the specified 26.5 cycles per minute
  • Measures rut depth and sample temperature automatically at regular intervals
  • The rut profile is captured automatically by the software and analysed to calculate the rut depth
  • A continuously updated on-screen graph shows rut depth versus time, along with the rut profile and temperature
  • Software stops the wheel tracker on completion of a test and prints a test report if required
  • Stored test data can be analysed and compared with other test data utilising a spreadsheet package
  • Utilities are included for transducer check, diagnostic routines and RTD calibration
  • Wheel Tracker Small Devices - software

    Wheel Load 700/520N
    Mould Dimensions mm 305 x 305mm (others available)
    Wheel Speed 26.5 cycles per minute
    Slab Thickness mm ¹ 40 to 100mm
    Rut Depth Transducer Range mm 50
    Temperature Range 40 to 60°C
    Electrical Supply Single 220-240 Volts 50/60 Hz @ 13A (others available)
    Dual 220-240 Volts 50/60 Hz @ 16A (others available)
    Compressed Air Dual 7-10 bar @ 600 L/min
    Dimensions mm (WxDxH) Single 1579 x 840 x 1740
    Dual 1750 x 1090 x 1970
    Working space required mm (WxDxH) Single 1680 x 1840 x 1940
    Dual 1850 x 3090 x 2070
    Estimated Weight Kg Single 448
    Dual 500
    PC Included

    ¹ others available upon request

    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.

    ¹ Please enquire for any other depths

    Steel and aluminium quick release mould for roller compactor or wheel tracker, 305 x 305 x 50mm deep¹
    Steel and aluminium quick release mould for roller compactor or wheel tracker, 305 x 305 x 100mm deep¹
    Photo? N.A CRT-INSERT-10
    Mould – Aluminium Insert 305 x 305 x 10mm – used to adjust mould depth¹
    Split holder with steel base-plate for 200mm Ø core specimen
    CRT-WH-IRDH-80-20 CRT-WH-IRDH-80-20
    Rubber wheel for Wheel Tracker for EN 12697-22
    CRT-WH-IRDH-80-20 CRT-WH-IRDH-20
    Rubber wheel for Wheel Tracker for AST 01:2004 and BS 598:110
    Photo? N.A CRT-WT-VM
    Add on to accept any mould sizes from 260mm. Retroffitable. For CRT-WTEN1
    Photo? N.A CRT-WTRCM-50L
    Mould – Wheel Tracker/Roller Compactor 260 x 305x 50mm deep
    Photo? N.A CRT-WTRCM-100L
    Mould – Wheel Tracker/Roller Compactor 260 x 305 x 100mm deep
    Please complete the form below to download the datasheet