DWT Hamburg type Double Wheel Tracker

Brand : Controls – Italia
Standard : AASHTO T324, EN 12697-22

Tujuan : Pengujian ini untuk mengevaluasi ketahanan dari suatu campuran terhadap deformasi permanen, hasil pengujian dapat digunakan untuk melengkapi Desian hasil uji Marshall tapi tidak dapat digunakan menentukan kadar aspal optimum. “(Seminar Nasional Keinsinyuran – Kinerja Laboratorium Campuran Aspal Beton Lapis Aus AC – WC (2) Dengan Modifikasi Retona Blend 55) “

Main Features :

• Meets and exceeds AASHTO standards and many DOT methods
• 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 from ambient to 80°C (±0.5°C)
• Accurate temperature control (±0.5°C) for both in water test
• Rut depth transducers feature 25 mm travel, 0.01 mm accuracy
• 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
• Free access to the wide testing area
• Optional independent lifting system for double or single wheel testing
• Slab mould size of 360×300 mm (for 320×260 mm slabs), double 150 mm gyratory compactor cylinders, 200 mm/8″/10″ diameter cores
• Slab thickness adjustable from 40 to 100 mm (in 10 mm steps)
• Extensive use of stainless steel in the machine’s construction; not limited to the parts in contact with water
• 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

General Descriptions :

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.

Machine body
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 258 to 70° ±1°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. 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.

• Displacement motion: the arm is moving and the carriage is fixed
• Wheel travel: 230 mm
• Wheel speed: variable from 20 to 30 cycles/min
• Wheel load: 705 N
• Temperature range: ambient to 80°C, ± 0.5°C
• Rut depth transducer range: 25 mm, 0.01 mm accuracy
• Moulds: not included, to be ordered separately
• Slab thickness: adjustable from 40 to 100 mm in 10 mm steps
• Overall dimensions (w x d x h): 1540x1020x1600 mm
• Weight approx.: 600 kg

Ordering Info :

Informasi Produk :

Yudhistira, ST

Hp. 0811 188 6845; 0818 0816 0634

Email : naysite2@gmail.com;