Automatic Wheel-Track Tester(Three wheels of scientific research)

The instrument is designed and made as per T0719-2011 “Bituminous Mixtures Wheel-Track Test” in the Industry Standard of People’s Republic of China JTG E20-2011 Standard Test Methods for Bitumen and Bituminous Mixtures for Highway Engineering. It is suitable to determine the wheel-track against capability of bituminous mixtures in high temperature. It also can be used to do the determination of the stability of bituminous mixtures in high temperature on site.

I.  Main technical characteristics

1. Each of the three wheels is designed with independent test wheel pressure automatic loading, automatic testing and real-time display technology, which is convenient for users to set the loading pressure according to their needs, monitor the real-time pressure, provide a more convenient pressure loading method for scientific research, and obtain more reliable scientific research data.

2. During the test, the color display screen displays the change curves of "time and displacement" and "time and temperature" in real time, providing a complete scientific basis for users to study the characteristics of asphalt mixture rutting.

3. The studio adopts the external circulation heating working mode, and is designed with a hot air circulation system to ensure that the three rounds of tests are completed under the conditions of uniform and consistent temperature field, so that the test data is more based on scientific research value.

4. With an onboard A4 laser printer, test results can be printed without a computer, which provides convenience for users to save test data and test data in real time.

5. It has the anti-blocking protection function of the test wheel motor and the protection function of the heating and overheating system to maximize the reliability of the instrument.

III.  Main technical parameters and specifications

1. Rolling speed of grinding wheel: (42 ± 1) times/ min (one way)

2. Test car moving distance: (230 ± 10) mm

3. Rubber hardness of grinding wheel: 78 ± 2 (international standard hardness)

4. Contact pressure between grinding wheel and test mode: (0.7 ± 0.05) Mpa (60 ℃), adjustable range: (0.5~1.2)Mpa

5. Displacement measuring range: (0 ~ 30) mm

6. Displacement measurement accuracy: less than ± 0.01mm

7. Test time: (60 ~ 240) min

8. Control range of constant temperature box: room temperature ~ 80 ℃ (can be set),

9.Temperature measurement accuracy: ±0.1℃

10. Tryout temperature control accuracy: ± 0.5 ℃

11.Working chamber temperature control accuracy: ± 0.5 ℃

11. Works: Immersion and non-immersion test

12. Temperature measuring channel number: 2 channels

13.Can do specimen number at the same time: 3

14. The number of specimens of health: 9

15. Working power supply: AC380V, 50Hz, 10A, three-phase four-wire system, with neutral wire