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Abstract. Despite the success of asphalt rubber in pavement performance, its primary concern is related to its production, which requires a specific plant to produce the asphalt rubber contiguous with the asphalt plant. Also, the storage stability presents some issues, mainly due to the segregation of the rubber and the digestion process that does not stop during this time. Thus, searching for new technologies for using crumb rubber in the asphalt has led to a hybrid method through the pre-treatment of the crumb rubber and a subsequent application in the dry process. This treatment produces the Reacted and Activated Rubber (RAR), a crumb rubber coated by a mastic of bitumen and filler. The mechanical performance of the RAR mixtures is related to the amount of modifier crumb rubber added to the base bitumen, so it is essential to study this influence by the performance test. Thus, this paper explores the viscosity and the rheological performance of asphalt binders with RAR by varying the amount added to the base bitumen. For a scale analysis, this work is extended to the study of the effect of RAR on mastic behavior.
