Carolina Gil Botero
Influence of Reclaimed Asphalt (RA) source on the effectiveness of rejuvenating agents by adopting a Model System.
Rel. Ezio Santagata, Davide Dalmazzo, Pier Paolo Riviera, Leonardo Urbano. Politecnico di Torino, Corso di laurea magistrale in Ingegneria Civile, 2021
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Abstract
Reclaimed Asphalt (RA) represents the material obtained from the milling and crushing of old and damaged asphalt mixture employed in the construction of the flexible pavement. The recycling of RA in new asphalt mixture has become attractive thanks to its technical, economic, and environmental advantages. In fact, RA recycling leads to a reduction of costs, providing a contextual solution to disposal problems and the minimization of environmental footprint. However, when the recycling of RA exceeds a limiting amount (normally more than 50%), the final mixture will be characterized by poor performance tightly connected with the presence of the aged binder in the RA.
Thus, to properly maximize recycling, the use of rejuvenating agents is required to restore the chemical and rheological properties of the aged and stiff RA bitumen
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