ABSTRACT
ABSTRACT: In terms of an experimental study conducted by the Laboratory of Highway Engineering of the National Technical University of Athens (NTUA), recycled material stabilized with foamed bitumen was used as a base of a rehabilitated semi-rigid pavement of a heavily trafficked highway. This study focuses on the in-situ characterization of foamed bitumen pavement material, with six-year monitoring experience, using mainly Non Destructive Tests (NDTs), accomplished with advanced analysis tools. Preliminary analysis considering non-linear behavior of the material was also performed. According to the deflection analysis, no decrease of the stiffness of the recycled layer is shown at least 6 years of heavy traffic loading. It is worth mentioned, that foamed bitumen mix moduli obtained from different FWD load levels produce similar strain response analysis results (max horizontal tensile strain) in the body of the foamed bitumen pavement material.
