Description
Viscosity Grade Bitumen Specification VG40 (IS 73:2013)
| Property | Units | VG-40 | Test Methods |
| Absolute viscosity at 60°C | P | 3200-4800 | IS 1206 |
| Kinematic viscosity at 135°C, Min | cSt | min400 | 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 | min50 | IS 1205 |
| Penetration at 25°C, 100g, 5sec, Min | 0.1MM | 30-50 | 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 | min25 | IS 1208 |
