Proceedings of the 6th International Conference on Mechanics and Materials in Design, Editors: J.F. Silva Gomes & S.A. Meguid, P.Delgada/Azores, 26&30 July 2015 2047 PAPER REF: 5705 A MECHANICAL ANALYSIS OF ASPHALT RECYCLED MIXTURES PRODUCED WITH HIGH RECYCLING RATES Liliana Abreu 1(*) , Joel Oliveira 2 , Hugo Silva 2 , Daniela Palha 3 , Paulo Fonseca 3 1 Department of Civil Engineering (DEC), University of Minho, Guimarães, Portugal 2 Centre for Territory, Environment and Construction (CTAC), University of Minho, Guimarães, Portugal 3 Elevogroup, MonteAdriano Engenharia e Construção, Porto, Portugal (*)  id4217@alunos.uminho.pt ABSTRACT In this work four asphalt mixtures were compared in terms of mechanical characteristics. One of the mixtures (control mixture) was used as a reference to the study of three mixtures produced with reclaimed asphalt pavement (RAP). One of the recycled mixtures incorporated 30% of RAP and the other two were produced with 50% of RAP. The effect of using a rejuvenator additive (3% rejuvenator) was also evaluated in one of the mixtures with 50% of RAP.  Recycling, reclaimed asphalt, rejuvenator additive. INTRODUCTION Recycling is nowadays a main concern to the society, and industries are facing the need to make some efforts to turn their products more environmentally friendly. In terms of road pavements, a number of new ideas have emerged in order to preserve natural resources and the use of reclaimed asphalt pavement (RAP) has become a very common practice (Dinis& Almeida et al., 2012). Normally the use of RAP in asphalt recycling means the addition of this materials to new asphalt mixtures, maintaining the function of the RAP components, but can be also used as unbounded material where the function of the materials were not maintaining (EAPA, 2005). Recently, a considerable number of authors have tested different solutions to incorporate the highest amount of RAP possible (Kaksonen, 2000, Widyatmoko, 2008, Su et al., 2009, Celauro et al., 2010, Valdés et al., 2011, Shu et al., 2012, Silva et al., 2012).The percentage of RAP used in the mixtures have a significant importance to choose the recycling procedure that the industries will use. High percentages of RAP can reduce the costs of the material but will demand higher asphalt plant modifications, which increase the production indirect costs (Oliveira et al., 2012, Silva et al., 2012). In this article, the characteristics of four mixtures were tested in terms of water sensitivity, fatigue cracking resistance and stiffness modulus. In terms of resistance to permanent deformation only three mixtures were tested, once the mixture with 30% of RAP was not prepared on time for the results to be presented in this paper. The objectives of this study are the evaluation of the influence of incorporating different RAP percentages and the use of 3% rejuvenator in one of the mixtures allowed understanding the influence of that type of additives in mixtures with high percentages of RAP.