Tenders Description & Specification for DWT Hamburg Type Double Wheel Tracker
DWT Hamburg Type Double Wheel Tracker
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.
Two versions are available with full access to the water bath or complete with clear transparent 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.
Machine body
Sheet steel, powder coated. Transparent sliding door.
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.
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.
Temperature control system
The Hamburg type Standard states that the test must be performed in a water bath with a temperature range of 258 to 70° ±1°C. The DWT Double Wheel Trackers fully satisfy and exceed the above requirements: the temperature accuracy is ± 0.5°C. A water level of about 20 mm above the sample has to be maintained. Where a heated air environment is specified, the specimen, during testing, must be maintained at uniform and constant specified temperature ± 1°C.
Impression measurement system
Each wheel is fitted with RUT DEPTH transducers for measuring deformations from 0 to 40 mm ±0.01 mm.
Technical Specifications
Wheel travel: 230 mm
Wheel speed: variable from 20 to 30 cycles/min
Wheel load: 705 N
Displacement motion: the arm is moving and the carriage is fixed
Temperature range: ambient to 80°C, ± 0.5°C
Slab thickness: adjustable from 40 to 100 mm in 10 mm steps
Rut depth transducer range: 50 mm, 0.01 mm accuracy
Overall dimensions (w x d x h): 1540x1020x1600 mm
Weight approx.: 600 kg.
Ltekonline are the manufacturers of DWT Hamburg Type Double Wheel Tracker used to demonstrate engineering principles in Engineering Colleges, Engineering Schools and Asphalt Mix Testing for Engineering Teaching Lab in Universities
