Revista Facultad de Ingeniería Universidad de Antioquia
versão impressa ISSN 0120-6230
CARO-SPINEL, Silvia e ALVAREZ-LUGO, Allex Eduardo. Assessment of moisture damage susceptibility of asphalt mixtures using thermodynamic properties. Rev.fac.ing.univ. Antioquia [online]. 2011, n.58, pp. 95-104. ISSN 0120-6230.
This paper presents a comparative assessment of the susceptibility to moisture damage for different combinations of Colombian asphalt binders and aggregates. The methodology applied focuses on the calculation of the Moisture Damage Index (MDI) for different asphalt binder-aggregate systems. This index has been estimated using thermodynamic properties (i.e., surface free energy) of the involved materials. The results suggest that: (i) the type of aggregate has a larger influence on the final mixture resistance to moisture damage, compared to the role of the type of asphalt binder and (ii) the modification processes used in the production of different types of modified asphalt binders generate asphalt binder-aggregate systems with a wide range of resistance to moisture damage. Finally, the results of this study prove that the thermodynamic characterization of paving materials can efficiently be used for material selection during the initial stage of mixture design.
Palavras-chave : Moisture damage; asphalt binder; surface free energy; work of adhesion; moisture damage index; pavements.