Description
Viscosity Grade Bitumen Specification VG20 (IS 73:2013)
| Property | Units | VG-20 | Test Methods | |
| Absolute viscosity at 60°C | P | 1600-2400 | IS 1206 | |
| Kinematic viscosity at 135°C, Min | cSt | min300 | IS 1206 | |
| Flash point (Cleveland open cup), Min | °C | min220 | IS 1209 | |
| Solubility in trichloroethylene, Min | %Wt | min99 | IS 1206 | |
| Softening point (R&B), Min | °C | min45 | IS 1205 | |
| Penetration at 25°C, 100g, 5sec, Min | 0.1MM | 60-80 | IS 1203 | |
| Tests on residue from thin film oven test: | ||||
| – Viscosity ratio at 60°C, Max | max4 | IS 1206 | ||
| – Ductility at 25°C, Min | CM | min50 | IS 1208 | |
