Discussing the feasibility of improving fatigue performance of asphalt mixtures by incorporating high recycled asphalt pavement

The application of Recycled Asphalt Pavement (RAP) is one of the most accepted strategies in pavement communities due to instability in natural sources and environmental issues, however the performance of substitute materials is still the main concern of producers. Structural properties of produced mixtures such as rutting resistance, strength and fatigue life have the main role in the durability of asphalt mixtures which strongly depend on aggregate and bitumen contents. This paper presents a review of recent studies and results on fatigue performance of asphalt mixtures containing different percentages of Recycled Asphalt Pavement (RAP). The aim of this paper is to emphasize the role of RAP in fatigue performance— which is one of the main distresses of bituminous mixtures- of asphalt mixtures and also to highlight benefits and disadvantages (limitation) of using high RAP content in asphalt mixtures. In addition, the possibility of using a high portion of RAP is discussed. Based on literature review, it can be inferred that including RAP could affect the fatigue performance of asphalt mixtures. © 2019 Taylor & Francis Group, London.