Authors:
Gholam Hossein Hamedi; Mohsen Sohrabi; Farhad Sakanlou;
Abstract:
Moisture damage reduces the mechanical properties of asphalt mixture via two main mechanisms (cohesion and adhesion failures). Accordingly, attempts were made in this research to investigate the effect of different mastic properties on parameters affecting adhesive failure mechanism. Two types of aggregate (limestone and granite) and four types of filler (stone powder, Portland cement, calcium carbonate and hydrated lime) were evaluated, in addition to AC 60/70 and 85/100 as asphalt binders. Results obtained in this research show that
stone powder and Portland cement fillers increase acid components of binder, but calcium carbonate and hydrated lime fillers show a different behavior (reducing acid components in binder 60/70 and increasing acid property in binder 85/100). In addition, the use of binder causes a reduction in non-polar component. Results
obtained by statistical analysis show that changing mastic type changes free energy of adhesion, but stripping parameter will not change significantly.
Keywords:
HMA, Moisture damage, Mastic properties, Surface free energy, Stripping, Adhesion