| Section |
Description |
| Application |
Determination of the resistance of bituminous binder to hardening under the influence of heat and air using the Rolling Thin Film Oven Test (RTFOT). |
| Introduction |
The Rolling Thin Film Oven Test unit simulates the hardening effect that occurs in bituminous binders during mixing with aggregates in asphalt plants and during laying and rolling of bituminous layers (Short Term Ageing).
The apparatus prepares binder samples for determination of mass change and for conducting additional tests related to short-term ageing resistance characteristics. |
| Salient Features |
- Over-temperature automatic safety switch.
- Automatic oven shutdown when door opens during testing.
- Door open indication lamp and alarm with running fan safety.
- Magneto-thermic protection switch.
- Double walled construction with SS-304 inner chamber and powder coated CRC outer body.
- High quality thermal insulation for minimum heat loss.
- Door fitted with high resistance glass and insulated air gap.
- Armored heating resistance for enhanced safety.
- Flow meter (Rotameter) with air flow regulator.
- Toothed belt driven vertical carriage and squirrel cage fan for constant speed operation.
- Microprocessor based Digital PID temperature controller for accurate temperature recovery.
- Continuous cooling fan for transmission system protection.
- Rotating shelf designed for uniform air circulation and heat distribution.
- Supplied complete with pilot indicating lamps, 2 meter cord wire, and power plug.
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| Technical Specifications |
- Temperature Control: Microprocessor based Auto-Tuning Digital PID controller cum indicator.
- Temperature Sensor: PT-100 Sensor.
- Temperature Display: LED Digital Display.
- Temperature Resolution: 0.1°C.
- Control Accuracy: ±1°C or better.
- Rotating Vertical Circular Shelf as per ASTM D2872.
- Carriage Rotation Speed: 15 ± 0.2 RPM.
- Electric Motor: GE / Crompton Greaves / Marathon or equivalent make.
- Glass Containers: Heat resistant transparent glass containers.
- Number of Glass Containers: 08 Nos.
- Air Jet Orifice Diameter: 1.016 mm.
- Copper Tubing: 7.6 meter length × 8 mm outside diameter.
- Exterior Body: Powder coated mild steel construction.
- Inner Chamber: Stainless Steel SS-304 mirror polished finish.
- Insulation: 2.5” high density glass wool insulation.
- Construction: Double walled construction.
- Heating Elements located at oven bottom as per ASTM D2872.
- Vertical blower arrangement for uniform heat distribution.
- Heavy duty stainless steel lock and spring-loaded hinges.
- Oven window with double glass air gap insulation.
- Adjustable ventilation system for volatile dissipation.
- Air flow adjustment using calibrated flowmeter (0–4000 ml/min).
- Inbuilt Air Compressor Capacity: 4 Liters.
- Power Supply: 220/230 V, 50 Hz, Single Phase AC supply.
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