Trends in the incorporation of nanomaterials in asphalt binders to improve rheological properties

Asphalt binders play a significant role in the performance of pavements. The current volume of traffic and loads on highways contribute to the occurrence of damages that affect the performance and lifespan of the asphalt mix. In this context, the development of optimized materials can help reduce damages and increase the lifespan of the pavement. One way to improve asphalt performance, that is, improving rheological, mechanical, and durability properties, is by incorporating nanomaterials. Through a systematic literature review and bibliometric analysis, this study aimed to verify the recent scientific scenario on the subject, aiming to identify trends and prospect content for future work. Thus, bibliometric indexes were analyzed, and the selected articles from the systematic search were summarized, which allowed the identification of the research objectives, the incorporated materials, and their optimal contents. Additionally, the asphalt matrices used, the tests performed, and the highlights regarding mechanical and rheological gains were identified. Finally, it was concluded that the study achieved its objective, contributing to decision-making in the prospecting of themes for future research.