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DWT Hamburg type Double Wheel Tracker

The Hamburg Wheel Tracker with unique solutions to perform reliable tests

AASHTO T324

DWT Hamburg Double Wheel Tracker, model 78-PV31A16
Easy sample positioning operations, thanks to the wide testing area
DWT Double Wheel Tracker equipped with 78-PV3/002 and 78-PV3/003
Rut monitoring by 25mm displacement transducer
150mm dia. gyratory compactor samples after test performance, mounting 78-PV3/005 and 77-PV3/003
Asphalt slab 320x260 mm, mounted with plaster to AASHTO T324 in 78-PV3/002
DWT Hamburg Double Wheel Tracker equipped with 78-PV3/005 trays with handles and 77-PV3/003 adaptors
Example of Stripping Inflection Point elaboration to AASHTO T324
78-PV3/005 tray with handles and 78-PV3/003 adaptors for double 150mm dia. sample

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 360x300 mm (for 320x260 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
  • Laptop PC control with dedicated software including results performance, test database management and multiple test elaboration
  • tecnical specifications
    • Scroll the table
      • 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
      • PC and software: included
      Models 78-PV31A16     78-PV31A26
      78-PV31A15     78-PV31A25
      Standards AASHTO T324
      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 203x47 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
      *Models 77-PV31A26 and 77-PV31A25 only
  • ordering info
    • 78-PV31A16
      DWT double wheel tracker (Hamburg type). Conforming to AASHTO T324, in-water specimen conditioning. Complete with laptop PC and software. Set of moulds to be ordered separately (see accessories).
      220 V, 60 Hz, 3 ph

      78-PV31A15
      As above but 380 V, 50 Hz, 3 ph

      78-PV31A26
      DWT double wheel tracker (Hamburg type). Conforming to AASHTO T324, in-water specimen conditioning. Complete with laptop PC and software and clear transparent sliding door. Set of moulds to be ordered separately (see accessories).
      220 V, 60 Hz, 3 ph

      78-PV31A25
      As above but 380 V, 50 Hz, 3 ph
  • accessories
    • 78-PV3/002
      Set of two moulds 360x300 mm (also suitable for 320x260 mm samples by using 20 mm thick plaster spacers), thickness variable from 40 to 100 mm. For tests conforming to AASHTO T324 in water.

      78-PV3/003
      Set of two mould adaptors for double 150 mm dia. core (total 4 adaptors made of special self lubricating acetal copolymer), thickness 60 mm, fitted in 77-PV3/002 360x300 moulds (not included). For tests conforming to AASHTO T324 in water.

      78-PV3/005
      Set of trays with handles for double 150 mm diameter cylindrical samples. 77-PV3/003 adaptors for 150 mm dia. cylindrical sample to be ordered separately. For tests conforming to AASHTO T324.

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