Articles in Taxonomy

Tests for bitumens and asphalt mixtures

To advance the quality of asphalt and to design durable asphalt mixtures, it is necessary to have good test methods for the evaluation of bitumen and asphalt properties both in the laboratory and on site. The link between the test results and long-term performance is of major importance in this respect. Moreover, uniformity in the test methods is pursued at the European level.

European test methods for bituminous mixtures and binders: improvements for sustainable development

L’objectif de ce projet de deux ans (1/10/2012 – 30/9/2014), subsidié par le NBN, était de continuer à développer et à améliorer les méthodes d’essai européennes qui tombent dans le domaine de travail des comités de normalisation européens CEN TC227/WG1 (pour mélanges bitumineux) et CEN TC336/WG1 (pour liants).

Development of performance tests for, and determination of the performance characteristics of, coloured bituminous pavements

This project was funded by the Belgian Bureau for Standardization (NBN) for a period of four years (1/10/2011 - 30/09/2014). It aimed mainly to:

  • develop performance tests for the objective determination of the colour and colourfastness of coloured bituminous mixtures;
  • assess the impact of the specific materials used on the mechanical performance characteristics of coloured asphalt mixtures;
  • verify the suitability of the European test methods for acceptance before and after laying.

The valorization of recycled and secondary materials

Using raw materials and energy economically helps to achieve sustainable road construction. As an alternative to consuming primary raw materials – which are mostly not renewable and, therefore, limited in supply and availability – secondary raw materials can be employed. These are materials used previously in an infrastructure or in some industrial process or product, which are considered as wastes when reaching the end of their service lives.


Structural analysis

A road is more than just a trafficked surface; there is a whole structure underneath. A road structure is usually composed of a subgrade soil, a subbase, a base, and a surfacing. Each course has a specific function: frost resistance, drainage, bearing capacity, etc.