Articles in Taxonomy

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:

About "Environmental issues"

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Environmental issues is an Area of Expertise of the Belgian Road Research Centre (BRRC). In this section the following (sub)themes are dealt with:

Reuse of Recycled and Secondary Materials

Noise Emissions

Weed Management and Control

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Fast and sensitive method to detect tar in reclaimed asphalt

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This research project subsidized by the FPS Economy, SMEs, Self-Employed and Energy was completed in two periods of two years.

INQUEST (2007-2008)

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Core Tasks (1)

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This was also a small sequel project to SILVIA, which was funded under the 6th EU Framework Programme. It was carried out by a consortium of BRRC, DRI and FEHRL. The object was to disseminate the knowledge on low-noise pavements gained in the SILVIA project to countries which had not participated in SILVIA. A number of one-day workshops were held in six countries (Slovenia, Romania, Switzerland, Ireland, Portugal, and Greece). In addition, a European working group on the Acoustic classification of road surfaces was formed, which held its first meeting in Ljubljana in April 2008 and its second in Copenhagen in September 2008.

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Statistical Pass-By (SPB) method

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The purpose of this method is to determine the acoustic quality of a given road pavement at a well-defined location. BRRC performs this test according to the specifications given in the relevant standard ISO 11819-1. A sound level meter and a tachometer are installed on the roadside to measure the maximum sound pressure level and the speed of a large number of randomly sampled passing vehicles. The results are statistically processed into an SPB index (SPBI), which is a good measure of the acoustic quality of the pavement at the measuring site – more particularly, of the influence of the pavement on traffic noise load for local residents. A full description of the test can be found in BRRC’s leaflet F67 “La méthode Statistical Pass-By (SPB)”.

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