Bitumen Performance Grade 70-10
High-Temperature Performance:
The PG 70-10 binder demonstrates excellent performance at high temperatures, as indicated by the Dynamic Shear Rheometer (D.S.R) and Rotational Viscometer (R.V) test results. The G*/sinδ value after the RTFO test is 3.85 KPa, exceeding the minimum requirement of 2.2 KPa, which indicates strong resistance to rutting and permanent deformation under high temperatures. Additionally, the viscosity at 135 °C is 0.5 Pa.s, well below the maximum limit of 3 Pa.s, ensuring ease of pumping and mixing during asphalt production. These properties make PG 70-10 highly suitable for heavy-traffic roads and hot climate conditions.
Low-Temperature Performance and Long-Term Durability:
At low temperatures, the Bending Beam Rheometer (B.B.R) results show a stiffness of 114.1 MPa and an m-value of 0.308, both meeting the standard requirements and indicating good resistance to thermal cracking during cold seasons. Furthermore, the Pressure Aging Vessel (PAV) test results reveal that the G*/sinδ value after long-term aging is 1820 KPa, well below the maximum limit of 5000 KPa, demonstrating durability and aging resistance. Overall, PG 70-10 provides a balanced combination of flexibility at low temperatures and rutting resistance at high temperatures, making it an ideal choice for highways and heavy-duty pavement applications.
| Bitumen PG 70-10 Specification | |||||
|---|---|---|---|---|---|
| Test | Method | Specification | Unit | Result | Range |
| Dynamic Shear Rheometer (D.S.R) | ASTM D7175 | Temperature | °C | 70 | |
| Phase Angle | ° | 85.4 | |||
| G* | KPa | 1.03 | |||
| G*/sin | KPa | 1.04 | Min 1.0 | ||
| Rotational Viscometer (R.V) | ASTM D4402 | at 135 °C | Pa.s | 0.5 | Max 3 |
| Penetration | ASTM D5 | at 25 °C | 0.1 mm | 43 | |
| Rolling Thin Film Oven Test (RTFO) ASTM D2872 | |||||
| Dynamic Shear Rheometer (D.S.R) | ASTM D7175 | Temperature | °C | 70 | |
| Phase Angle | ° | 82.4 | |||
| G* | KPa | 3.81 | |||
| G*/sin | KPa | 3.85 | Min 2.2 | ||
| Pressure Aging Vessel (PAV) ASTM D6521 | |||||
| Dynamic Shear Rheometer (D.S.R) | ASTM D7175 | Temperature | °C | 31 | |
| Phase Angle | ° | 54.4 | |||
| G* | KPa | 2246 | |||
| G*/sin | KPa | 1820 | Max 5000 | ||
| Bending Beam Rheometer (B.B.R) | ASTM D6648 | Temperature | °C | -10 | |
| m-Value | 0.308 | Min 0.3 | |||
| Stiffness | M.Pa | 114.1 | Max 300 | ||
