The reuse of paving materials is becoming increasingly frequent when major upgrading is carried out on road networks. This practice must be accompanied by requirements and methods adapted to the properties of the materials used, i.e. reclaimed asphalt and reclaimed concrete. The findings of characterization trials conducted on reclaimed asphalt and reclaimed concrete must, therefore, be interpreted cautiously. Reclaimed asphalt and reclaimed concrete take the form of particles made up of aggregates of conventional granule material bound by asphalt and cement, respectively. The findings of wear and shock tests conducted on these recycled materials make it possible to allocate them for use in foundations, sub-foundations and for any other road use. Their behaviour varies depending on the proportion of reclaimed asphalt and reclaimed concrete. The different findings of tests conducted on mixtures made up of 100% reclaimed asphalt and 100% reclaimed concrete lead to different uses. Since 1997, an internal committee at the minist_re des Transports du Qu_bec (MTQ) has been examining the requirements to be modified and the methods adopted. A classification of different types of recycled materials (RMs) has been established. Each class reflects a specific bearing capacity and ease of use. Certain uses of RMs may be prohibited or restricted. For the covering abstract of this conference see ITRD number E211271.
Samenvatting