Lab Digital Electric Asphalt Rolling Thin Film Oven RTFO
Working principle
Simulate the performance changes of asphalt under heating and air during mixing and construction, and assess the aging performance of asphalt through a short-time test.
Structural design
Inner liner and outer shell: The inner liner is made of stainless steel with strong heat reflection. The intelligent digital display temperature controller automatically controls the temperature, measures, and has error correction function. The outer middle layer is formed by hot plate bending, and there is silicon wool in the middle for insulation, which effectively reduces heat loss.
Heating and ventilation system: Designed for upper and lower convection heating, squirrel cage fan guides flow and controls temperature, reheats to 163℃ 10 minutes after closing the door after loading, built-in air compressor, low noise, no oil return, double-layer design, electric heating system with temperature regulator to continuously maintain the set temperature, so that the indoor air flow rotates and circulates in a certain direction under the action of forced ventilation; there are air inlet holes at the bottom and exhaust ports at the top to ensure air circulation.
Power system: The power source is an advanced permanent magnet synchronous motor and speed changer to ensure that the working turntable rotates reliably at a speed of (15±0.2) r/min.
Air supply system: There is a double-layer heat-resistant glass window on the oven door, through which the test conditions inside the oven can be observed. The oven is equipped with a small air compressor, which adjusts the flow rate through a glass rotor flowmeter, and sprays dry hot air into the sample bottle through a fully preheated ventilation pipe and nozzle, with an air supply volume of (4000±200) ml.
Temperature control system: The intelligent digital temperature controller is used for automatic temperature control and measurement, and has an error correction function. The temperature control accuracy is ±0.5℃.
Maintenance
1. The Bitumen Thin Film Oven can only be used for asphalt rotating film heating test, the upper temperature limit is 200℃, and the asphalt Rolling Thin Film Oven is equipped with an over-temperature protection function.
2. After use, cut off the power supply, open the door for ventilation, and wipe off the residue in the box.
3. Wash the sample bottle with gasoline or trichloroethylene.
Technical parameters
| 1. Voltage | 220V±10%; Power 3.5kW |
| 2. Turntable speed | 15r/min±0.2r/min, 8 sample bottles can be loaded at a time |
| 3. Temperature control accuracy | 163℃±0.5℃ |
| 4. Gas supply | 4000±200mL. |
| 5. Studio size | 430×410×400mm |
| 6. Built-in lighting in the environmental chamber | |
| 7. Time setting | 1S~99h |
| 8. Thermometer | 0~200℃±0.1℃, two. The temperature control table can be calibrated. |
| 9. Dimensions | 900*900*1200mm |
| 10. Sample bottle | Heat-resistant glass, height 139.7mm±15mm, outer diameter 64mm±1.2mm, wall thickness 2.4mm, mouth diameter 31.75mm |