EN 12591:2009 is a European standard that specifies the requirements and test methods for penetration-grade bitumens used in road construction and other industrial applications. It defines the physical and chemical properties that bitumen must meet to ensure quality and performance.
Key Aspects of EN 12591:2009
- Scope
- Applies to straight-run bitumens (not modified or oxidized).
- Covers grades like 20/30, 30/45, 35/50, 40/60, 50/70, 70/100, 100/150, 160/220, and 250/330.
- Main Parameters Tested
- Penetration (EN 1426): Measures hardness (e.g., 50/70 means 50–70 mm/10 at 25°C).
- Softening Point (EN 1427): Indicates temperature susceptibility (Ring & Ball method).
- Fraass Breaking Point (EN 12593): Measures cold-temperature brittleness.
- Ductility (Optional, but critical for adhesion and flexibility).
- Flash Point (EN ISO 2592): Safety parameter (min. 240°C).
- Solubility (EN 12592): Purity check (min. 99.0% in trichloroethylene).
- Resistance to Hardening (RTFOT or PAV aging tests).
- Comparison with Other Standards
- Similar to ASTM D946 (USA) but with stricter aging tests.
- Differs from AASHTO M20 in some test methods (e.g., Fraass point vs. ASTM brittleness).
- Application
- Used in EU and countries adopting European norms for asphalt binders, road pavements, and waterproofing.
Example for Bitumen 50/70 (EN 12591:2009)
| Property | Requirement |
| Penetration (25°C) | 50–70 mm/10 |
| Softening Point | 46–54°C |
| Fraass Breaking Point | ≤ -8°C to -14°C (varies by climate) |
| Flash Point | ≥ 240°C |
Why It Matters?
- Ensures consistency for asphalt mixes in varying climates.
- Mandatory for EU public tenders and infrastructure projects.
