Bitumen VG 20
Bitumen VG 20 widely use in spraying applications such as surface-dressing and paving in very cold climate & high altitude regions.
surface spraying dressing.
Paving in very cold climate.
high altitude regions.
Also It uses in Bitumen Emulsion and Modified Bitumen products.
Viscosity Bitumen VG 20(Asphalt) is a Bitumen grade mostly use as a Paving Grade and it’s suitable for road construction and for the asphalt pavements producing with premier attributes. VG Bitumen usually use in the production of hot mix asphalt.
Viscosity Grade Bitumen is petroleum grade bitumen, which produced from fractional vacuum bottom which comes from distillation of crude oil, which feasible appliance and behavior changes according to its temperature.
Bitumen Viscosity Grade is specified by ASTM Standard D3381-09 and AASHTO M226-80 (2008). VG Bitumen specifications cover by Viscosity at 60 ̊C (140 °F).
We have two methods of grading:
- Standard Viscosity Grade Bitumen (AC-Grades), in which the Viscosity of the standard bitumen (asphalt) measure at 60 ºC (140 ºF).
- RTFOT Viscosity Grade Bitumen (AR-Grades). In which the Viscosity of bitumen (asphalt) measure at 60 °C (140 °F) after the roll on thin film oven test.
In conclusion Viscosity grade bitumen has a thermoplastic feature which causes the material to soften at high temperatures and to harden at lower temperatures. And this temperature viscosity relevance is significant when specifying the performance parameters. For instance the adhesion, rheology, durability and application temperatures of bitumen. In the Viscosity Grade Bitumen specifications, the most important emphasizes is based on the Bitumen ductility.