Articles in Taxonomy

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.


Techniques for reduced-temperature asphalt production and their impact on asphalt performance

A highy topical subject in the contribution of road construction to sustainable development is the production of asphalt mixtures at lower temperatures (reduced-temperature asphalt, RTA), because of the advantages from the energy, environmental and engineering points of view. Within a project on European test methods for bituminous mixtures and binders that was initiated by the Belgian Bureau for Standardization (NBN) and aims among other things at improvements with a view to sustainable development, BRRC has undertaken to closely monitor the recent developments and achievements in the field of RTA, both in Belgium and abroad. This includes the following aspects:

Extraction and recovery of binders from bituminous mixtures prepared with polymer-modified bitumens

This four-year project (July 2006 – June 2010) was funded by the Belgian Bureau for Standardization (NBN). Its objective was:

  • to improve the procedures for the extraction (with a continuous flux centrifuge) and recovery (with a rotary evaporator) of binders from bituminous mixtures prepared with polymer-modified bitumens (PmBs) (EN 12967-1 and -3);
  • to study and improve the procedure for the determination of binder content by ignition (EN 12697-39).

Characterization of bound and unbound granular materials

Using secondary granular materials for (sub)base layers helps save on natural resources and transport costs and avoids expensive run to spoil.

Determining the mechanical properties of soils treated with cementitious binders by the splitting tensile test (“Brazilian test”)

The principle of the splitting tensile test consists mainly in performing a diametral compression test on a specimen of compacted treated soil after a given curing time.