A Bibliometric Analysis of Reclaimed Asphalt Pavement for Green Infrastructure

Reclaimed Asphalt Pavement (RAP) has emerged as a strategic component in the development of sustainable and environmentally responsible infrastructure systems. As the global construction industry seeks innovative approaches to reduce environmental impacts and resource consumption, the reuse and recycling of asphalt materials have attracted growing academic and practical interest. This study aims to map the literature on RAP from 2015 to 2024 and to identify potential future research directions, particularly regarding its integration within green infrastructure initiatives. The bibliometric analysis was conducted using metadata obtained from the Scopus database and examined with the aid of the VOSviewer tool and RStudio through its Bibliometric package via the Biblioshiny web-based interface. The findings highlight key contributors in the field, including the most productive authors, influential journals, prominent institutions, and leading countries. The study also explores the network of co-authorship and keyword co-occurrence, revealing dominant research themes. While strong linkages were found between RAP and topics such as asphalt pavements, asphalt mixtures, and recycling, emerging areas—such as nature-based solutions, bio-based rejuvenators, and biomaterial by-products—remain underexplored and present valuable opportunities for advancing sustainable infrastructure research.