Materials Testing
    Vacuum Degassing Oven VDOVacuum Degassing Oven VDO

Vacuum Degassing Oven VDO

AASHTO R28, ASTM D6521, EN 14769

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Vacuum Degassing Oven VDO

Most Standards make degassing the oven of the PAV-aged asphalt samples mandatory. The Vacuum Degassing Oven (VDO) is designed to remove air bubbles created during accelerated oxidative aging 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 integral 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.

The Vacuum Degassing Oven VDO can be used as part of your Superpave performance-based testing program.

The vacuum is provided by an integrated vacuum system 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 touchscreen display. Data logs of both temperature and vacuum are saved on a USB stick or transferred to a 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 a temperature traceable calibration certificate, 8 aluminum 55×35 mm sample containers, a double face sample holder, and an 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


  • Working temperature range: ambient to 200° C
  • Temperature measurement: Platinum RTD with +/- 0.1° C resolution
  • Pressure measurement: pressure transducer wit +/- 1 kPa resolution
  • Power: 600 W
  • Dimensions, mm (l x w x h): 430 x 440 x 480
  • Weight: 30 kg approx.


Vacuum Degassing Oven (VDO) - meets AASHTO R28, ASTM D6521 and EN 14769 test standards - 110V, 60Hz, 1Ph