Évaluation de l'évolution des performances et du comportement des enrobés coulés à froid notamment avec matériaux recyclés

Abstract

The harsh climatic condition, the high level of vehicular traffic and the composition of the pavement structure itself is closely linked to the pavement degradation. The lack of proper maintenance can results in the need to use costly rehabilitated technique to bring back the pavements to their initial properties. Hence the importance to maintain the road network to a proper level of service. There are several maintenance techniques available such as microsurfacing, crack sealing, slurry sealing, fog sealing, etc. The microsurfacing is the application of very thin layer of cold mix asphaltic materials which is environmental friendly. Although the microsurfacing is considered as one of the best methods for pavement preservation, many aspects of their performance, such as their rutting resistance, mix and binder aging and stiffness, are not yet well understood. Also, the possibility of incorporating recycled asphalt pavement (RAP) into the microsurfacing mix design is one of the other challenges which the researcher are faced in the evaluation of microsurfacing materials. The main objective of this thesis is to evaluate the rutting resistance, aging and stiffness of the microsurfacing mixes with and without RAP. This also included the evaluation of the extracted binder from both the microsurfacing mixes with and without RAP. This thesis was oriented along three main axis. The first part covers the mix design of microsurfacing with and without RAP. The second part covers the evolution of the mechanical performance thru time. of microsurfacing with and without RAP. The third section shows a life cycle analysis that was performed to evaluate the benefits of using RAP in microsurfacing. The results have shown that it’s possible to make microsurfacing with RAP if the mix design is adapted. It is also shown that thermal ageing affects the microsurfacing rigidity and rutting resistance, which has an impact on their benefit from a pavement design standpoint. The environmental aspects of microsurfacing mixes are evaluated in this thesis as well. Finally, the field performance of microsurfacing mixes with RAP is evaluated in this Ph.D. thesis

Date	2 May 2018
Original language	French
Awarding Institution	École de technologie supérieure
Supervisor	Alan Carter (Supervisor) & Anne Dony (Co-supervisor)