Our new video “VDO Vacuum Degassing Oven” is on YouTube

VDO is used to remove air bubbles formed in the simulation of bitumen and bituminous binders of PAV pressure aging vessel.

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.