ABSTRACT
The use of foamed bitumen has been mainly based on the traditional technique where hot bitumen is mixed with a stream of cold water to generate foam, for cold bitumen mixtures. However, with the development of a variety of technologies to produce foamed bitumen and the continuous advances in pavement recycling, many agencies have adopted the use of this material in combination with Reclaimed Asphalt Pavement (RAP) materials as part of pavement rehabilitation strategies and subgrade stabilization processes. This paper evaluates the effects of moisture on the rheological properties of various Fine Asphalt Mixtures (FAM) containing 50% RAP and incorporating different foaming technologies, through the application of the Dynamic Mechanical Analysis (DMA) technique. The results suggest that the mixtures exhibited important changes in the dynamic shear modulus at different conditioning times with the RAP materials being more susceptible to moisture damage.
