The only truly sinusoidal Hamburg wheel tracker on the market. Another representation of Cooper quality and attention to detail
The Hamburg type dual arm immersion wheel tracker is widely used to evaluate the resistance to rutting and moisture susceptibility of asphalt mixtures following either EN12697-22 or AASHTO-T324. The device was developed in the 1970’s by Esso A.G. of Hamburg, Germany. It was based on the TRL wheel tracker which is also now included in EN12697-22.
Originally the Hamburg test was used by the City of Hamburg to measure rutting susceptibility. The test was performed for 9,540 wheel passes at either 40 or 50°C. Water was used to obtain the required test temperature rather than air. The City of Hamburg later increased the number of wheel passes to 19,200 and found that some mixtures began to deteriorate from moisture damage. Greater than 10,000 wheel passes was generally needed to show the effects of moisture damage.
Specimens can be prepared in the laboratory, or cores taken from the road can be used. Loaded steel or rubber wheels track a sample under regulated load, speed and temperature, whilst the development of the rut is constantly monitored and recorded throughout the test.
Standards
- EN 12697-22
- AASHTO-T324
- Other national standards where relevant
Accessories
Accessories are not included in the price of main device (unless stated otherwise) and may be purchased separately if required.
| CRT-WTRCM-50 |
Mould – 305x305x50mm deep |
| CRT-WTRCM-100 |
Mould – 305x305x100mm deep |
| CRT-INSERT-10 |
Mould – Insert 305x305x10mm |
| CRT-WTM-DIAM200 |
Split Wooden Holder with Steel Base-plate Ø200mm |
| CRT-WTIMRCM-50 |
Mould – 305x305x50 deep Stainless Steel |
| CRT-WTIMRCM-100 |
Mould – 305x305x100 deep Stainless Steel |
| CRT-WTIMRCM-26060 |
Mould – 260x320x60 deep Stainless Steel |
| CRT-WTIMRCM-26060-150 |
Plastic Mould (6″) inserted in Stainless Steel Mould |
| CRT-WTIMRCM-26050 |
Mould – 260x320x50 deep Stainless Steel |
| CRT-WTIMRCM-26050-150 |
Plastic Mould (6″) inserted in Stainless Steel Mould |
| CRT-WTIM-RUBBERWHEEL (Replacement Part) |
Stainless Steel Rubber Wheel for EN Standard |
| CRT-WTIM-SOLIDWHEEL (Replacement Part) |
Stainless Steel Solid Wheel for ASSHTO Standard |
Specifications
Technical specifications are subject to change without notice.
| Wheel Speed |
Variable up to 30 cycles (60 passes) per minute |
| Wheel Load |
700 ± 10 N |
| Load Cell kN |
250 |
| Mould Dimensions mm |
305 x 305 and 305 x 400 (others available, please contact us or see accessories) |
| Slab Thickness mm |
50 – 100 (different thicknesses can be tested with spacers) |
| Rut Depth Transducer Range mm |
50 |
| Temperature Range |
20 – 75 ºC |
| Electrical Supply¹ |
380-415 Volts 50Hz @ 16A |
| Dimension mm (W x D x H) |
1430 x 1380 x 1260 |
| Estimated Weight Kg |
687 |
| PC |
Included |
¹ others available upon request
Calibration & Maintenance
Calibration, Annual Service and Maintenance Contracts are available for this device.
Please enquire for further details. Note: This device should be checked and calibrated annually.
