Estudo dos efeitos de produtos rejuvenescedores no comportamento físico, químico e reológico de ligante asfáltico envelhecido

Recycling is a topic that has been gaining enough space in various areas of engineering. When one reuses materials in civil construction works, there is an indirect contribution to the preservation of nature. Within this context, the recycling of asphalt layers is a subject that draws great interest but requires further study. This paper aims to study the effects of rejuvenating agents on aged asphalt binders, for their application in recycling of asphalt mixtures. The aged binder was initially extracted and then rejuvenating agents were added, i. e., a tar-based agent (RejuvaSeal) and shale-oil residues commercially designated as AR-5, AR-250 and AR-500, at percentages of 15, 20 and 25% by mass, in order to determine which content would be appropriate to recover the original characteristics of the binder. Among the many findings from this study is that the mixture containing 20% of AR-5 shows better behavior when compared to a new asphalt binder (CAP 50-70).