Dosing of hot recycled asphalt mixtures with different levels of milled material

Abstract

The asphaltic pavements have presented structural and functional deficiencies due to the increasing flow of commercial vehicles throughout the national territory. The pavement recycling technique is an alternative for the maintenance of the ideal conditions of safety and comfort to the users, maintaining the technical standards and the environmental conditions involved. In the light of this, this work tried to evaluate hot recycled mixtures with the incorporation of milled material. The dosages were prepared with 10, 20 and 30% RAP and their results of Resilience Module (TM) and tensile strength by diametrical compression (RT) were compared to those of a reference design without the addition of RAP. The results obtained showed that, for the evaluated criteria, the values of the tests increased as the percentage of incorporated RAP increased, being around 50% for the RM and approximately 40% for the RT, evidencing the possibility of improvement in the use of the technique. The reduction of the new asphalt binder insert could also be observed and its value decreased by approximately 17%. It is evaluated that the technique of hot recycling of pavements is technically, economically and environmentally feasible, being able to be included in the paving practices as to the elaboration, machining and application of these mixtures in the field.