VG40 bitumen is used in areas in which high pressure comes from heavy traffic loads, such as intersections, near tolls booths, and truck parking lots.
Due to the high viscosity of this bitumen, it is more appropriate for improving resistance to shoving and other problems associated with higher temperatures and heavy traffic loads.
It is suitable for a temperature above 40°C,
Its absolute viscosity is 3200,
It is a preferred type of bitumen when heavy traffic load is expected.
Viscosity Grade Bitumen Specifications Table
| CHARACTERISTICS | VG-10 | VG-20 | VG-30 | VG-40 | |
| Absolute Viscosity 60°C, Poises, min | 800 | 1600 | 2400 | 3200 | |
| Kinematic Viscosity, 135°C, CST, min | 250 | 300 | 350 | 400 | |
| Flash point, C, min | 220 | 220 | 220 | 220 | |
| Solubility in trichloroethylene, %, min | 99 | 99 | 99 | 99 | |
| Penetration at 25°C | 80-100 | 60 | 50-70 | 40-60 | |
| Softening point, C, min | 40 | 45 | 47 | 25 | |
| Viscosity ratio at 60°C, max | 4 | 40 | 4 | 4 | |
| Ductility at 25°C, cm, min, after thin film over test | 75 | 50 | 40 | 25 | |
