Life Cycle Abessment of road pavements rehabilitation re-using high content of Reclaimed Asphalt Pavement

The main objective of the paper is to abess the viability of the re-use of RAP mixtures as a solution for road pavement rehabilitation combining mechanical, functional and environmental aspects. To evaluate the environmental impact a Life Cycle Abessment (LCA) was performed considering a real pavement section. The LCA was carried out on two scenarios that stem from the combination of production, construction and maintenance operations: one that considers 75% RAP incorporation in new asphalt mixture; and another as the reference solution with virgin raw materials. The mechanical behavior was evaluated by determining the stiffness, water sensitivity and permanent deformation. The functional performance was evaluated through the macrotexture and skid resistance. Significative gains were observed in LCA. RAP mixtures showed as a viable alternative to virgin solutions.