Eur. Phys. J. Appl. Phys.
Volume 58, Number 2, May 2012
|Number of page(s)||14|
|Section||Instrumentation and Metrology|
|Published online||09 May 2012|
Analyzing the influence of manufacturing conditions of reclaimed asphalt concrete on the characteristics of the asphalt binder: development of a gradual binder extraction method
Laboratoire TREFLE (UMR 8508), Arts et Métiers ParisTech – Bordeaux, Esplanade des Arts et Métiers, 33405 Talence Cedex, France
2 EUROVIA, Centre de Recherche de Mérignac, 22 rue Thierry Sabine, 33703 Mérignac, France
3 Laboratoire GREMACOR, École Spéciale des Travaux Publics, 28 avenue du président Wilson, 94234 Cachan, France
a e-mail: email@example.com
Revised: 20 March 2012
Accepted: 21 March 2012
Published online: 9 May 2012
When asphalt concrete is manufactured incorporating a high percentage (almost 70%) of reclaimed materials from the deconstruction of road surfaces under renovation, and when the corresponding production device is designed specifically to reduce the energy input need (lowering the production temperature), the resulting manufacturing process contributes to the protection of the environment and reduces production costs. However, to meet the quality requirements of the finished product, virgin materials of appropriate quality and quantity must also be added (mineral aggregates and new asphalt binder) and control systems set up to quantify and optimize the parameters involved (thus avoiding the guess work which still often prevails today). It was for this reason that a new experimental technique described here was devised, which will ultimately be used in asphalt concrete production plants. The technique involves lixiviating reclaimed asphalt concrete using a chlorinated solvent; the resulting solute is collected gradually, then the mixture of binders (virgin and reclaimed asphalt concrete) can be characterized and their mass fractions quantified using a combination of UV and IR spectrometry. With this experimental technique we were able to assess the extent to which the reclaimed asphalt pavement binder participates in the agglomeration and cohesion of the reclaimed asphalt concrete. This assessment was made in terms of the main parameters in the production process, temperature of the materials and mixing time.
© EDP Sciences, 2012
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