This instrument is based on the industry standards of the People's Republic of China JTG E20-2011《 In the test procedures for asphalt and asphalt mixtures for highway engineering T0719-2011《 Designed and manufactured in the requirements specified in the Asphalt Mix Rutting Test, it is suitable for the determination of the high-temperature rutting resistance of asphalt mixture, and can also be used for the high-temperature stability test of asphalt mixture on site.

1. Main technical characteristics

1、This instrument is a floor-standing structure, adopts laptop control technology, automatically controls temperature, automatically times, displays the displacement of the ruts in real time, and automatically records the displacement curve and prints reports.

2、During the test, the time and displacement, time and temperature change curves are displayed at the same time, providing a practical basis for scientific research institutions that study the rut characteristics of asphalt mixtures.

3、This instrument can be tested at 40 ℃～80℃,Wheel pressure is 0.7 MPa The rut test is carried out, the standard test time is 60 min。

4、The temperature is collected using an absolute temperature sensor. PWM The modulation method is temperature control, with high temperature stability, no overshoot, and long-term test without temperature drift (eliminating the impact of long-term working temperature drift of general thermocouple temperature sensors on test data).

5、Adopt high-precision A/D（16 Bit), D/A（16 ) module ensures accuracy and resolution of displacement measurement and temperature control. The constant temperature box adopts external circulation heating method, and the temperature field is uniform.

6、It adopts pneumatic loading method, which is easy to operate and accurate loading pressure.

2. Main technical indicators and parameters

① Main technical indicators

⑴ Crushing speed of test wheel: 42 ±1Second-rate /Minutes (one way)

⑵ Test cart movement distance: (230 ±10）mm

⑶ Rubber hardness of test wheel: 78 ±2（60℃，International standard hardness)

⑷ Contact pressure between the test wheel and the test mold: (0.7 ±0.05）Mpa（60℃), adjustable range 0.5 ～1.2（Mpa）

⑸ Test piece temperature: 60 ℃±0.5℃

⑹ Temperature measurement accuracy:                     ±0.1℃

⑺ Displacement measurement range: 0 ～30（mm）

⑻ Displacement measurement accuracy:                   ±0.01mm

⑼ Control range of constant temperature box: (40 ～80）℃（Can be set at will), control accuracy ±1℃

② Main technical parameters

⑴ Working method: Non-water immersion test

⑵ Test mold size: 300 mm×300mm×50mm（ standard)

                                                  Available for 30 ～100mm Thick test pieces for rut test

⑶ Number of temperature measurement channels: 1 channel

⑷ Test time: 60 ～240（min）

⑸ Number of test pieces that can be made at the same time: 1

⑹ Number of test pieces for health preservation: 3

⑺ Crushing motion method: Test rotation

⑻ Overall machine size: 1320 mm×750mm×1400mm（ long ×Width ×high)

⑼ The weight of the whole machine: 250 kg

⑽ Working power supply:                             AC380V、50Hz，10A， Three-phase four-wire system with neutral wire