Wheel Tracker Small Device – 1 & 2 Arms

Wheel Tracker Small. 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.

Standards

• EN 12697-22 Small device
• AGPT/T231 (supersedes AST 01)
• 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 Specifications:

 Product Catalogue