VISCOSITY GRADE BITUMEN – WHAT ARE THE TYPES AND THEIR SPECIFICATIONS?
|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 |