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Abstract

The study IS focused on the use of RCA as a granular material for an asphalt mix, in order to reduce the negative environmental impact that is generated in the country due to its erroneous disposal in inappropriate sites, the large amount that is generated and to the minimum level of reuse of said materials. For these reasons, it is desired to evaluate the resistance under monotonic load and resistance to moisture damage of an HMA-19 mixture, when the 100% stone aggregate is substituted and replaced by RCA. Initially, the primary materials of the mixture were characterized (60/70 asphalt cement, stone aggregates and recycled concrete aggregates). Subsequently, a laboratory tests and trials plan were defined, as well as replacement dosages, to determine the amounts of RCA and the processes that will be used to evaluate its performance. For this, briquettes with asphalt contents of 4.5%, 5.0%, 5.5%, 6.0% and 6.5% were tested with and without substitution of the stone aggregate for 100% RCA, being modified by mass and volume. Evaluating the briquettes using the Marshall test and indirect traction, the data generated were compared using the Anova statistical model. From the results it was concluded that the mixtures modified by mass and by volume compared to the conventional mix, are very unstable and it is necessary to carry out more tests and modeling in order to find an adequate use for the recycled concrete aggregates within of asphalt mixtures.