Bitumen Class 320 Australia
Australian Standard Bitumen C320 is a viscosity‐graded paving bitumen developed for heavy-duty road and pavement applications where high stability and load resistance are required. This grade is engineered to provide strong cohesion and excellent adhesion to mineral aggregates, creating a dense and durable asphalt mix. Its higher consistency compared to lower grades makes it especially suitable for high-traffic roads, industrial pavements, and areas exposed to elevated temperatures.
Manufactured in accordance with Australian standards, C320 is strictly controlled for penetration, viscosity, flash point, and purity to ensure consistent field performance. It offers a balanced combination of stiffness and flexibility, helping pavements resist rutting, shoving, and premature cracking. With good resistance to oxidation and long-term aging, Bitumen C320 contributes to extended pavement life, reduced maintenance frequency, and reliable performance in demanding service conditions.
| Australian Standard Bitumen C320 Specifications | ||||
|---|---|---|---|---|
| Specification | Test Method | Unit | Min | Max |
| Specific Gravity @ 25°C | ASTM D70 | – | 1.01 | 1.06 |
| Penetration @ 25°C | ASTM D5 | 0.1 mm | 40 | – |
| Absolute Viscosity @ 60°C | ASTM D2171 | P | 260 | 380 |
| Kinematic Viscosity @ 135°C | ASTM D2170 | cSt | 0.40 | 0.65 |
| Flash Point (COC) | ASTM D92 | °C | 250 | – |
| Matter Insoluble in Trichloroethylene | ASTM D4072 | % wt | – | 1.0 |
| After Rolling Thin Film Oven Test (RTFO) | ||||
| Viscosity of Residue @ 60°C | ASTM D2171 | Pa.s | – | 300 |
