New and improved types of asphalt

Areas of Expertise (1)

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Test sections in high-modulus asphalt at Kontich (motorwayE19) Test sections with low-noise thin surface layers at Kasterlee (regional road N19)

The development of new applications and the constantly increasing demands on roads create a permanent need for innovative and improved types of asphalt that ensure higher performance and durability. Mix design with the PradoWin software package (see Components and mix design) and the set of performance tests on asphalt mixtures (see The development of tests for bitumens and asphalt mixtures) for which BRRC has equipped itself make it possible to develop new and optimize existing types. This is often followed by the construction and monitoring of test sections in cooperation with road authorities, which may result in recommendations and specifications.

BRRC keeps a close watch on developments abroad and seeks to implement successful innovations in Belgium as soon as possible.

A few examples are:

  • high-modulus asphalt, for use in base courses subjected to heavy traffic (mainly to reduce rutting) (see High-modulus asphalt: a cure for the susceptibility to rutting of asphalt roads);
  • reduced-temperature asphalt, which is produced at temperatures 30 to 50 °C lower than hot-mix asphalt;
  • thin and ultra-thin surface courses for noise reduction;
  • coloured asphalt (see Development of performance tests for, and determination of the performance characteristics of, coloured bituminous pavements and ultra-thin surface courses for noise reduction).