In the context of this collaborative research involving CERIEC, the Régie intermunicipale de traitement des matières résiduelles de Gaspésie (RITMRG), Bauval, the Laboratoire sur les Chaussées et Matériaux Bitumineux (LCMB), and the École de technologie supérieure (ÉTS), the effect of integrating recycled asphalt shingles (RAS) into bituminous mixtures was scrutinized to evaluate the impact on the properties and performance of the mixes. The results demonstrate that the mixtures enriched with these recycled materials meet technical criteria with equivalent or even improved performance compared to traditional mixtures. Notably, the mixture with 25% RAS-Gaspésie and 4% added bitumen showed a void content of 7%, a Marshall stability of 13,341 N for soaked specimens and 15,206 N for unsoaked specimens, and water resistance of 87.7%, surpassing the minimum specification of 85%. This formulation also exhibited remarkable resilience to rutting with a rutting percentage well below the defined thresholds after 30,000 cycles. The use of various materials like RAS from Varennes, GBR, and slags, adjusted to 4% added bitumen, confirmed the possibility of reducing the use of new bitumen while maintaining high quality standards. These discoveries encourage the adoption of more sustainable construction practices in the road sector, highlighting the importance of meticulous characterization of recycled materials to ensure the performance and longevity of the mixtures.
Mouafo Nuentsa, S. R. (Author),
Carret (Supervisor) &
Vaillancourt (Co-supervisor),
19 Jun 2024Student thesis: Master's thesis › Master in Engineering: Environmental Engineering