Vacuum Degassing Oven VDO

Most Standards make degassing oven of the PAV-aged asphalt samples mandatory. The Vacuum Degassing Oven (VDO) is designed to remove air bubbles created during accelerated oxidative ageing of asphalt binder by the PAV. This final conditioning makes the aged binder suitable for further tests such as BBR, DSR, penetration, ductility, softening point and many more.

The apparatus consists of a stainless vacuum vessel with encased band heaters and integlral vacuum and temperature controls. A platinum RTD measures internal test temperature to +/- 0.1° C. Selectable test temperatures (from ambient to 200° C) are controlled to +/- 4.0° C.

Vacuum is provided by an integrated vacuum system and monitored by a pressure transducer and controlled to achieve 15 kPa absolute pressure. Temperature and vacuum are indicated both as set points and as actual values on the 6″ digital color touch screen display. Temperature and vacuum calibrating can be site executed. Data logs of both temperature and vacuum are saved on USB stick or transferred to PC at the end of the test.

The vacuum chamber can accept either eight 55×35 mm or four 70×45 mm (available as accessories) sample containers. The instrument is supplied complete with temperature traceable calibration certificate, 8aluminium 55×35 mm sample containers, a double face sample holder and operator’s manual.

• Platinum RTD temperature internal measurement to +/- 0.1° C
• Selectable test temperature (from ambient to 200° C) controlled to +/- 4.0°C
• Integrated vacuum pump
• Vacuum monitored by transducer and controlled to 15 +/-0.1 kPa absolute pressure
• Digital touch screen 6″ display for temperature, vacuum, set points and actual values
• Reclining display allowing view from any angle
• Over temperature limit switch
• Network ready for remote monitoring of the test status from PC, tablet or smartphone