CONVENTIONAL BITUMEN
The most common type of bitumen obtained from the refining of crude oil.
The most common type of bitumen obtained from the refining of crude oil.
Paving grade bitumen 50/70 is primarily suitable for use in asphalt concrete (AC) and stone mastic asphalt (SMA) for wearing courses, provided that the mixture meets the specified requirements for rutting resistance. When utilizing 50/70 bitumen for base and binder courses, it is essential to verify the mixture’s resistance to rutting. However, the use of 50/70 bitumen is not recommended for any pavement layer intended to withstand heavy, slow-moving traffic, such as slow lanes or approaches to crossroads.
Reference standard: EN 12591:2009
| Property | Unit | Test Method | Requirement |
|---|---|---|---|
| Penetration at 25°C | 0.1 mm | EN 1426 | 50 – 70 |
| Softening point | °C | EN 1427 | 46 – 54 |
| Resistance to hardening at 163°C | EN 12607-1 (RTFOT method) | – | |
| Retained penetration | % | EN 12607-1 (RTFOT method) | ≥ 50 |
| Increase in Softening point | °C | EN 12607-1 (RTFOT method) | ≤ 9 |
| Change of mass* (absolute values) | % | EN 12607-1 (RTFOT method) | ≤ 0.5 |
| Flash point | °C | EN ISO 2592 | ≥ 230 |
| Solubility | % /m/m) | EN 12592 | ≥ 99.0 |
Paving grade bitumen 70/100 may be used to a limited extent for asphalt concrete (AC) and stone mastic asphalt (SMA) in wearing courses on roads intended for light traffic, provided that the mixture’s resistance to rutting is verified.
Reference standard: EN 12591:2009
| Property | Unit | Test Method | Requirement |
|---|---|---|---|
| Penetration at 25°C | 0.1 mm | EN 1426 | 70 – 100 |
| Softening point | °C | EN 1427 | 43 – 51 |
| Resistance to hardening at 163°C | EN 12607-1 (RTFOT method) | – | |
| Retained penetration | % | EN 12607-1 (RTFOT method) | ≥ 46 |
| Increase in Softening point | °C | EN 12607-1 (RTFOT method) | ≤ 9 |
| Change of mass* (absolute values) | % | EN 12607-1 (RTFOT method) | ≤ 0.8 |
| Flash point | °C | EN ISO 2592 | ≥ 230 |
| Solubility | % /m/m) | EN 12592 | ≥ 99.0 |
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