Speaker
Description
Abstract. The maintenance and rehabilitation of flexible pavements gener-ates an appreciable volume of waste from the reclaimed asphalt pavement (RAP). One of the processes for the RAP valorization is the transformation into recycled aggregates to be reintegrated in the pavement life cycle, to-wards a circular economy model. Unbound granular layers of flexible pave-ments are a field of application of these recycled aggregates. The objective of the paper is to present a catalogue of flexible pavements incorporating RAP in unbound granular layers, developed in Portugal for low volume roads. Beyond the catalogue, the paper describes the research work developed to demonstrate the mechanical and environmental performances of the pro-posed pavement structures. In laboratory, cyclic triaxial tests and leaching tests were conducted in addition to current geometric, physical, and me-chanical tests. Load tests were carried out on experimental full-scale pave-ments to validate the mechanical behavior of RAP mixtures in real condi-tions of application. The paper introduces traffic, materials, and subgrade conditions that supported the application of the catalogue. The catalogue aims to contribute for the implementation of sustainable pavement solu-tions in road construction.
