Bitumen with viscosity grade (asphalt) is a bitumen with a suitable grade for street paving, which is used in the road construction industry and asphalt pavements, especially in areas such as India. Viscosity bitumen is mainly used in the production of hot mix asphalt for road covering and insulation and the production of liquid bitumen. By combining the viscoelastic reaction of bitumen with other materials, very flexible and viscous joints will be obtained, which behavior depends on the speed used in the reaction.
Viscosity bitumen, which is supplied as refinery bitumen, is produced from vacuum aeration of the baton of the distillation tower, and refinery bitumen is produced from vacuum slag of raw materials, and it depends on the temperature of the bitumen from a scientific and behavioral point of view.
The ASTM standard system has defined methods such as D3381-09 and AASHTO M226-80, which grade of bitumen viscosity is determined by these methods.
According to the latest revision of the ASTM standard, bitumen viscosity is divided into the following four grades:
| Row | Title | Specifications |
| 1 |
bitumen VG10 |
Description (click) |
| 2 |
bitumen VG20 |
Description (click) |
| 3 |
bitumen VG30 |
Description (click) |
| 4 |
bitumen VG40 |
Description (click) |
