A Preliminary Study on the Use of Recycled Asphalt Pavement (RAP) in Mortars

The use of different types of recycled materials in the building sector became of central importance in recent years as one of the main goals worldwide is to reduce the depletion of natural resources and favour the exploitation of already existing materials in a more sustainable manner. The aim of this paper is to present a recycled material deriving from the milling of asphalt pavement (Recycled Asphalt Pavement, RAP) and its possible uses as aggregate in mortars. More specifically, a preliminary review on the influence of RAP on the mechanical characteristics of mortars, such as grading, compressive strength, flexural strength, splitting tensile strength and durability, is presented in relation to the various percentages of substitution of natural aggregates with this recycled material. Lastly, an overview on the codes and standards regulating the use of recycled materials in mortars is given, together with the respective imposed restrictions.