Mezclas asfálticas mejoradas con caucho de llantas añadido por vía seca.

Abstract

At the international level, the use of recycled tire rubber (RTR) in asphalt pavements has produced optimal results, however, experimental studies done in Ecuador employing the wet process has not shown good results. This work’s objective is to evaluate the effect that GCR added by the dry process has in different percentages on the behavior of dense asphalt mixtures, while keeping the mineral aggregates and asphalt’s characteristics constant. Asphalt mixtures with 0, 0.75, 1.5% of TRT were designed and its performance was evaluated with laboratory tests of Marshall stability, permanent deformations, stiffness modulus and fatigue, but also the effect of water on these asphalt mixtures through retain resistance using TSR. From the results obtained, it was determined that it is not convenient to add 1.5% of GCR to the asphalt mixture since its resistant properties got deteriorated and adding 0.75% of GCR does not differ much from the traditional mixture, except for creep deformation, being able to be used as layers for reflective cracking control using thin thicknesses and superficial layers on roads of light traffic, such as unpaved roads in urban areas, also with small thicknesses where the impact of rutting would be greatly reduced.