Vacuum Degassing Oven (VDO)
- EN 14769
- ASTM D6521
- AASHTO R28
The long-term aging of bitumen and bituminous binders obtained by a Pressure Ageing Vessel (PAV), generates air bubbles which must be removed in according with EN 14769, ASTM D6521 and AASHTO R28 standards.
The Vacuum Degassing Oven (VDO) consists of a stainless still vacuum vessel with a hinged lid to conserve space and access the vacuum chamber. It can hold up to 8 specimen containers.
The unit allows selectable working temperature range from ambient to 200°C with a resolution of ± 0.1 °C, measured by a platinum RTD probe.
The VDO guarantees the required operating pressure of 15 ± 1 kpa for the achievement of vacuum.
The unit is equipped with a 7’’ colour Touch screen controller indicating:
temperature and pressure in real time and current stage of each process.
The user-friendly software allows the operator to carry out the test in different modes:
- AUTOMATIC: Maintains the temperature constant at 170 °C for 30
minutes as required by the standards
- SEMI-AUTOMATIC: Selectable test temperature from ambient to
200 °C and the test runs for 30 minutes as in automatic mode
- MANUAL: Selectable both test temperature from ambient to
200 °C and time up to 99 minutes for research purposes.
At the end of the test is possible to obtain uniform bitumen samples that can be used for further analysis to identify Performance Grade (such as DSR, DTT and BBR) or conventional bitumen properties (such as penetration, ductility, softening point among others)
Power supply: 230V 1ph 50Hz
Dimensions: 430x450x470 mm approx
Weight: 30 kg approx.