Abstract
Reclaimed asphalt pavement (RAP) is a valuable material that can be recycled and reused in road engineering to reduce environmental impact, resource utilization, and economic costs. However, the application of RAP in road engineering presents both opportunities and challenges. This study visually analyzes the knowledge background, research status, and latest knowledge structure of literature related to RAP using scientific metric methods such as VOSviewer and Citespace. The Web of Science (WoS) core collection database identified 2963 research publications from 2000 to 2022. Collaborative networks between highly cited references, journals, authors, academic institutions, countries, and funding organizations are analyzed in this study, along with a co-occurrence analysis of keywords for the RAP research publications. Results showed that the USA has long been a leader in RAP research, China surpassed the USA in annual publication output in 2019, increasing from 2 publications in 2002 to 177 publications in 2022, and has made significant investments in technological aspects. Chang’an University ranked first in total publication output (131 publications, 4.4%). Current major research themes include road performance, recycling technology, regeneration mechanisms, and the life cycle assessment of RAP. In addition, based on cluster analysis of keywords, text content analysis, and SWOT analysis, this study also discusses RAP’s challenges and future development directions in road engineering. These findings provide scholars with valuable information to gain insight into technological advances and challenges in the field of RAP.
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Funding
This work was supported by the National Natural Science Foundation of China (No. 51778515 and No. 71961137010), the Technological Innovation Major Project of Hubei Province (2019AEE023), the Key R&D Program of Hubei Province (2020BCB064), and the State Key Laboratory of Silicate Materials for Architectures (Wuhan University of Technology, No. SYSJJ2019-20).
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All authors contributed to the study’s conception and design. Visualization and supervision were performed by Wei Liu and Shaopeng Wu. Review and editing were performed by Qi Jiang and Wei Liu. Project administration was performed by Shaopeng Wu. The first draft of the manuscript was written by Qi Jiang, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.
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Jiang, Q., Liu, W. & Wu, S. Technological advances and challenges of reclaimed asphalt pavement (RAP) application in road engineering—a bibliometric analysis from 2000 to 2022. Environ Sci Pollut Res (2024). https://doi.org/10.1007/s11356-024-33635-w
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DOI: https://doi.org/10.1007/s11356-024-33635-w