The wheel tracking test is used for determining the susceptibility of Hot Mix Asphalt (HMA) to deform under load by measuring the rut depth formed by repeated passes of a loaded wheel at a fixed temperature. Both versions can be upgraded with automatic  system which lift one of the wheel from the specimen that has reached the rut target continuing the test on the other specimen. See Upgrading options Automatic wheel lifting mechanism. Two versions available as prescribed by Small Size device: specimen conditioning in air and in air or water.

Main Features:

Fully automatic test performance on two specimens or one specimen

Variable wheel speed from 20 to 30 cycles/min

Fixed table, mobile wheel 230 mm travel

Accurate temperature control (±0.5°C) for both in water and air test

Rut depth transducers feature 50 mm travel, 0.01 mm accuracy

Wheel load of 700 N

Temperature range from ambient to 80°C (±0.5°C)

Free access to the wide testing area

Optional independent lifting system for double or single wheel testing

Slab mould size of 400x300 mm

Automatic water filling and leveling system, no need to adjust or control the water level above the specimen during test

Possibility to add two optional temperature probes to monitor the two samples temperature

Slab thickness adjustable from 40 to 100 mm (in 10 mm steps)

Direct rut depth measurement system, with transducers axially mounted in alignment with the wheel's centre

Motorized wheel-assembly lifting system for easy removal of slabs

Extensive use of stainless steel in the machine's construction; not limited to the parts in contact with water

Laptop PC control with dedicated software including results performance, test database management and multiple test elaboration

The software includes the possibility to program pre-heating and machine start (without operator intervention) and to measure the rut depth measurement in user-defined positions for research purposes or local specifications.

Technical Specifications:

Wheel travel: 230 mm

Wheel speed: variable from 20 to 30 cycles/min

Wheel load: 700 N

Displacement motion: the arm is moving and the carriage is fixed

Slab thickness: adjustable from 40 to 100 mm in 10 mm steps

Temperature range: ambient to 80°C, ± 0.5°C 

Rut depth transducer range: 50 mm, 0.01 mm accuracy

Overall dimensions (w x d x h): 1540x1020x1600 mm

Weight approx.: 600 kg.