Summary

  This instrument is designed and made as per industrial standard T0719-2011 Wheel Track Test for Bituminous Materials in JTG E20-2011 Standard Test Methods of Bitumen and Bituminous Mixtures for Highway Engineering. It is used to determine the wheel track resistance property of bituminous mixtures under high temperature condition(Immersed in water or not immersed in water),determine the high temperature stability of the bituminous mixtures at site.

I. Main technical features

1. The instrument with the floor type,adopts PC control technology,automatic temperature control during testing
    process,self-clocking,real-time displaying the displacement of wheel track,and self-recording the displacement
    curve,printing out the report.

2.Displaying the variation curves of time and displacement,time and temperature during the test,it can supply the practical
   evidence for the research and development institutions to study the characteristics of bituminous mixtures wheel-track.

3.The instrument can do the test at the temperature range 45℃～85℃,wheel-pressure at 0.7MPa,standard test period: 60
   mins.

4. It equips an absolute temperature sensor,uses the PWM adjusted method to control the temperature,the temperature
    with high stability,no overswing and no temperature drift during long time test.

5.Adopting high precision A/D(16 bits),D/A(16bits) modules to ensure that displacement measurement and temperature
   control are accuracy and resolution ratio.The constant temperature tank use the external circular heating method to
   make sure the uniform temperature.

II. Main technical specifications

1. Standards:  industrial standard T0719-2011 in  JTG E20-2011

2. Grinding rate：   (42±1)times/min(one-way)

3. Test wheel movement distance：  230mm±10mm

4. Rubber hardness：      78±2 at 60℃,international standard.

5. Loading device： 0.7MPa±0.05Mpa when CPRESS is at 60℃,optional 0.8,0.9Mpa

6. Displacement measuring range：    0mm～30mm

7. Displacement measuring accuracy：   ＜0.01mm

8. Wheel track test time：   60 minutes～240 minutes. 60 minutes is standard

9.Temperature control for constant temperature chamber： Ambient temp.～80℃，precision ±0.5℃.

1) Overall machine dimension: 1320mm×750mm×1400mm(L*W*H)

2) Gross weight: 250kg

3) Sample dimension: 300mm×300mm×50mm(standard),can test the thickness of samples from 30 to 100mm .

10.Work mode: no submerging test

11.Temperature measurement accuracy: ±0.1℃

12.Environment control accuracy: ±0.5℃

13.Sample temperature control accuracy: ±0.5℃

14.Temperature measurement channels: 1 channel

15.Testing sample quantity: 1 piece

16.Maintaining sample quantity: 3 piece

17. Roller motion mode: Test wheeled

18. Power supply

  (1)Three-phase supply: AC380V, 50Hz, 3Kw, three-phase four-wire system, with zero line.

  (2)Single-phase supply: AC220V, 50Hz, 5A, single-phase three-wire, with ground line.

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