What are the Types of VG Bitumen
As per IS:73-2006 , bitumen is classified into four types based on viscosity, as given below.
- VG-10
- VG-20
- VG-30
- VG-40
What are the Requirements of Paving Bitumen (VG Bitumen)
Characteristics |
Paving Grades or Viscosity Grade Bitumen Requirements |
|||
|
VG-10 |
VG-20 |
VG-30 |
VG-40 |
|
| Absolute viscosity at 600C, Poises, Min |
800 |
1600 |
2400 |
3200 |
| Kinematic viscosity at 1350C, cSt, Min |
250 |
300 |
350 |
400 |
| Flash point, (cleveland opencup), 0C, Min |
220 |
220 |
220 |
220 |
| Solubility in trichloroethylene, %, min |
99.0 |
99.0 |
99.0 |
99.0 |
| Penetration at 250C |
80-100 |
60-80 |
50-70 |
40-60 |
| Softening point, 0C, Min |
40 |
45 |
47 |
50 |
| Tests on residue from thin film oven test/RTFOT | ||||
|
4.0 |
4.0 |
4.0 |
4.0 |
|
75 |
50 |
40 |
25 |