Asphalt Performance Tester – Hamburg Wheel-Track Test (HWTT)

HWTT-0766 Asphalt Performance Tester- Hamburg Wheel-Track Test (HWTT)

Product Introduction

HWTT-0766 Asphalt Performance Tester is suitable for measuring the rutting and water sensitivity of hot mix asphalt mixture;

It can test the permanent deformation rate of asphalt mixture under moving load;

Early failure due to insufficient aggregate structure, insufficient binder strength, or water damage can be determined by measuring the rutting depth of the asphalt mixture and the number of loadings at failure;

Can also choose a water immersion test method to evaluate the impact of water damage on asphalt mixtures.

Standards

1. American Highway and Transportation Association AASHTO T324 Standard method of test for Hamburg wheel-track testing of compacted hot mix asphalt (HMA)

2. EU EN 12697-22 Bituminous mixtures — Test methods for hotmix asphalt — Part 22 Wheel tracking

Main technical features

1. Computer control, simple and convenient operation.

2. Using a high-precision displacement sensor, the accuracy is better than ±0.01mm in a large range.

3. Automatic temperature control, automatic generation and storage of test results.

4. Use absolute temperature sensor to collect temperature, with wide temperature control range, high precision and good stability.

5. Use PWM modulation method for temperature PID control to ensure that the temperature does not overshoot.

6. Linear modulation of temperature sensor and displacement sensor can ensure linearity within the full scale.

7. The data collection method is to collect 11 points in a 210mm area symmetrical to the center of the test mold to calculate the average deformation, which is used as the deformation when calculating the test results.

8. There are two options for stopping the test: stop by time or stop by number of laps.

9. Use an open workbench to facilitate installation and removal of trial molds.

10. The whole machine is made of high-quality stainless steel, which is beautiful and easy to clean.

Main technical specifications

1. Displacement sensor: (0~100)mm accuracy ±0.01mm

2. Temperature range: Room temperature ~80℃ Accuracy ±1℃

3. Steel test wheel: φ203.2mm×47mm

4. Trial discussion speed: (15~55) times/minute

5. Walking distance: (230±10)mm

6. Test time: (0~480)min

7. Number of tests: (0~30000) times

8. Contact pressure: (0.7±0.05)Mpa

9. Trial mold size: 300mm×300mm×50mm (standard), cylindrical trial mold with thickness (30~100)mm required by specifications

10. Working method: immersion test and non-immersion test

11. Number of temperature measurement channels: 2 channels

12. Working power supply AC (380±10)V, 50Hz, 20A