What is BS EN 12697‑49 – Bituminous mixtures about?
BS EN 12697‑49 is a European standard and a part of the BS EN 12697 series that discusses the determination of friction after polishing for bituminous mixtures.
BS EN 12697‑49 specifies a method to determine the friction at 60 km/h after polishing during a fixed number of passes on surfaces of bituminous mixtures samples or to follow its evolution as a function of the number of polishing passes. The samples used are either produced in a laboratory or are cores taken from the site.
Who is BS EN 12697‑49 – Bituminous mixtures for?
BS EN 12697‑49 on bituminous mixtures applies to:
- Manufacturer of bituminous mixtures
- Construction engineers
- Quality control personnel
- Testing authorities
- Regulatory authorities
Why should you use BS EN 12697‑49 – Bituminous mixtures?
Bituminous mixtures, which are also called asphalt mixtures, are the combinations of aggregates with different gradations, filler types, content, and hardness with bitumen of different grades and quantities. Friction after polishing an average of two or more single results μ FAP.
BS EN 12697‑49 lays down the technicalities for a test procedure to determine the friction after polishing the bituminous mixture. It gives you detailed information about the apparatus arrangement to conduct the test, explains the principle of the test, helps the users to execute the calculations as well as concludes the final test report.
Overall, BS EN 12697‑49 provides you with a comprehensive guide that will be handy throughout the process of friction after polishing of bituminous mixture.
What’s changed since the last update?
BS EN 12697‑49:2022 supersedes BS EN 12697‑49:2014, which is withdrawn. It includes:
- The title no longer refers to hot mix asphalt
- [Introduction] added, giving the general context of the test method and the need to improve it
- Possibility of following Friction After Polishing (FAP) evolution as a function of the number of polishing passes. NOTE deleted since the Wehner and Schulze method is now mentioned in the Introduction