INFRA 2015
Monsieur Jean-Claude ROFFE est ingénieur. Il travaille au sein de l'industrie de la route depuis 1968. Il agit actuellement à titre de chef des Affaires européennes pour l’Union des syndicats de l’industrie routière française, vice-président de la European Union Road Federation et est conseiller international pour ICR Consultant. Il a été directeur du développement international pour SCREG puis COLAS depuis 1985. Il possède de l’expertise en tant que gestionnaire de projet pour l'auscultation, d'audit et d'évaluation des actifs routiers à des projets internationaux. De plus, il est auteur de plusieurs articles sur les processus de la route et préservation des chaussées.
Résumé de la conférence
During the last 30 years a lot of studies were made in Sweden concerning how to prevent wear from studded tires. The main conclusions were the following:
- Increase use of SMA or other types of gab graded asphalt to reduce wear. (Ultra-Thin Friction Course, UTFC, or Novachip type, is normally better then dense graded asphalt concerning wear.)
- Bigger aggregates normally gives better wear resistant. (But increase noise and could influence the skid resistance during the summer period for some types of aggregate)
- Low void content improves wear resistant
- Aggregate type and quality have a great impact on wear resistance
- Improvements in the crushing process could in many cases improve the quality of the aggregate concerning wear resistance in the final pavement. (Use of cubic aggregate by better processing in the crushing plant) An SMA 11 could be better than a SMA 16 if cubic aggregate is used
- High degree of asphalt compaction is of course very important.
The communication will present some parameters to use in the mix design and lab tests. One of the best concluding reports has been made by Torbjörn Jacobson and Lars Göran Wågberg at VTI in Linköping we will comment during the oral presentation.
