Paving Grade Bitumen Class 320
Class 320 bitumen is most commonly used to manufacture asphalt mixes.
Due to its higher viscosity, stiffer asphalt mixes can be produced to improve resistance to shoving and other problems associated with higher temperature and traffic loads.
Bitumen C320 Applications
Bitumen C320 is primarily for use in asphalt, but can also be sprayed as a sealing binder for heavy duty applications and in hot desert regions.
In asphalt applications, appropriate mixture and pavement designs should be employed to maximise the performance of the asphalt layer in service.
| Asphalt recommendations | ||||
| Mixing Temperature | Holding time at Mixing Temperature | Medium term storage temperature | Medium term storage time | Maximum safe handling temperature |
| 165-175°C | 14 days | 130-150°C | 30 days | 185°C |
| Sealing recommendations | ||||
| Spraying Temperature | Holding time at spraying temperature | Medium term storage temperature | Medium term storage time | Minimum pavement temperature |
| 170-185°C | 7 days | 130-150°C | 30 days | 15°C |
| Bitumen C320 Typical characteristics | |||
| Description | Units | Methods | Typical |
| Viscosity at 60° C | Pa.s | AS 2341.2 | 320 |
| Viscosity at 135° C | Pa.s | AS 2341.2 | 0.5 |
| Pen at 25° C | dmm | AS 2341.12 | min 40 |
| Flashpoint | ° C | AS 2341.14 | min 250 |
| Viscosity of residue at 60° C (% of original) | Pa.s | AS 2341.2 | max 300 |
