Our asphalt 50-70 strikes a perfect balance between workability and performance. It is a versatile bitumen product suitable for a range of applications, including road surfacing, airport runways, and industrial flooring.
| Property | Method | Result | Unit | 30/45 | 35/50 | 40/60 | 50/70 | 70/100 |
| Penetration @25C, 100g, 5s | EN 1426 | 60 | 0.1mm | 30-45 | 35-50 | 40-60 | 50-70 | 70-100 |
| Ductility @25C, 50mm/min | EN 13589 | 150 | Cm | >100 | >100 | >100 | >100 | >100 |
| Softening Point, Ring and Ball | EN 1427 | 51 | °C | 52-60 | 50-58 | 48-56 | 46-54 | 43-51 |
| Flash Point, Cleveland, open Cup | EN ISO 2592 | 302 | °C | ≥240 | ≥240 | ≥230 | ≥230 | ≥230 |
| Solubility in Toluene | EN 12592 | 99.8 | % | ≥99.0 | ≥99.0 | ≥99.0 | ≥99.0 | ≥99.0 |
| Kinematic Viscosity @1356 | EN 12596 | 402 | mm2/s | ≥ 400/NR | ≥ 370/NR | ≥ 325/NR | ≥ 295/NR | ≥ 230/NR |
| Resistance to Hardening RTFO @ 163°C | EN 12607-1 | – | – | – | – | – | – | – |
| Retained Penetration | EN 1426 | 67 | % | ≥53 | ≥53 | ≥50 | ≥50 | ≥46 |
| Increase in Softening Point | EN1427 | 6 | °C | ≤8 | ≤8 | ≤9 | ≤9 | ≤9 |
| Change Of Mass (Absolute Value) | EN 12607-1 | 0.09 | % | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.5 | ≤0.8 |
This table provides the specifications of a particular grade of bitumen (50-70) in accordance with the British Standard (BS) EN 12591:2009. The data is divided into specific properties of the bitumen, each tested with a particular method as per the standard.
Let’s break down the individual elements of the table:
1. Penetration @25C, 100g, 5s (EN 1426): This is a measure of the hardness or softness of the bitumen by determining the depth (in tenths of a millimeter) to which a standard needle will penetrate vertically, under specified conditions of loading, time and temperature. In this case, the results are shown for different ranges, from 30/45 to 70/100.
2. Ductility @25C, 50mm/min (EN 13589): Ductility is the distance to which a standard bitumen sample can be stretched before it breaks. The higher the value, the more ductile the bitumen.
3. Softening Point, Ring and Ball (EN 1427): This is the temperature at which a steel ball falls through the bitumen in a test device. It is a measure of the temperature at which the bitumen reaches a certain viscosity.
4. Flash Point, Cleveland, open Cup (EN ISO 2592): The flash point is the temperature at which bitumen gives off vapours that can ignite. The higher the flash point, the less risk there is of the material spontaneously catching fire.
5. Solubility in Toluene (EN 12592): This indicates the bitumen’s solubility in toluene and is expressed as a percentage. Higher values mean better solubility.
6. Kinematic Viscosity @135C (EN 12596): Kinematic viscosity is the measure of the inherent resistance of bitumen to flow. This is especially important when the material is heated for making asphalt, or for storage and transportation.
7. Resistance to Hardening RTFO @ 163°C (EN 12607-1): RTFO refers to the Rolling Thin Film Oven test, which is used to measure the hardening effect during the hot storage of asphalt mixtures.
8. Retained Penetration (EN 1426): This is the resistance of the bitumen to further penetration, after it has been subjected to specific conditions (in this case, the RTFO test).
9. Increase in Softening Point (EN1427): This is the increase in softening point following the RTFO test, which is a measure of the bitumen’s tendency to become more brittle when subjected to the hot storage conditions that might be experienced in service.
10. Change Of Mass (Absolute Value) (EN 12607-1): This refers to the change in mass of the bitumen after the RTFO test, which is indicative of the volatility of the lighter fractions in the bitumen.
Each property has a result value, and the unit of measure, along with the specific criteria for different ranges of bitumen grades. This helps in choosing the right bitumen grade for a specific requirement or application.