Canada’s Instrumentation Leader Since 1946.
Main Features Full conformity to AASHTO T324-19, including sinusoidal movement (RMSE certificate available on request) and rut depth measurement in 11 defined points 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 Wheel load of 705 N Temperature range […]
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. We also produce Wheel Trackers conforming to EN 12697-22 standard and a Universal version conforming to both AASHTO and EN Standards. See Double Wheel Tracker, EN versions and Universal AASHTO/EN Double Wheel Tracker.
Two versions are available with full access to the water bath or complete with clear trasparent sliding doors, water bath covers and automatic water filling and leveling system.
The DWT Hamburger type Double Wheel Tracker can be used as part of your Superpave performance based testing program.
Sheet steel, powder coated. Trasparent sliding door.
Loaded wheel system
The wheel load is 705 N. The system includes a motorized lifting system for raising the wheel assembly at the end of the test.
Wheel tracking carriage
The wheel is moved 230 mm backwards and forwards on the top of the slab, which is fixed. The speed is adjustable via the PC from 20 to 30 cycles per minute (40 to 60 passes). The longest slab dimension is oriented to the wheel's direction of travel. Special slab moulds for circular samples obtained from coring or gyratory compactors are also available. See accessories.
Temperature control system
The AASHTO Hamburg type Standard states that the test must be performed in a water bath with a temperature range of 25 to 70° ±1°C. A water level of about 20 mm above the sample has to be maintained. The DWT Double Wheel Trackers fully satisfy and exceed the above requirements: the temperature accuracy is ± 0.5°C.
Impression measurement system
Each wheel is fitted with RUT DEPTH transducers for measuring deformationsfrom 0 to 40 mm ±0.01 mm.
|Testing mode||In water|
|Description||DWT Hamburg type Double Wheel Tracker, wet conditioning version|
|Material and dimensions (diameter per width) of the two loaded wheels||Stainless steel 203×47 mm|
|Temperature control method (accuracy ±0.5°C for both water and air)||Three 1500 W heaters, re-circulating pump, automatic filling and control level*|
|Power rating||5500 W|