Evolution of High-Temperature Effects on Recycled Concrete: A Bibliometric Analysis

The fire resistance of recycled concrete is a critical factor that influences its extensive utilization in structural engineering. This review-based study employs a science mapping approach to evaluate the research conducted in the past two decades on the effects of high temperatures or fire on recycled concrete. By analyzing 200 articles related to recycled concrete subjected to high temperature or fire, this study identifies influential journals and countries that have actively contributed to the field since 2006. Keyword analysis reveals emerging research topics, including the prediction of mechanical properties of recycled concrete under high temperatures and the exploration of innovative recycled concrete mixed with various fibers under high temperatures. The ensuing discussion summarizes the predominant research areas, highlights research gaps such as the limited focus on investigating the performance of recycled concrete at high temperatures, and proposes potential directions for future research, such as optimizing prediction models using deep learning algorithms to evaluate the mechanical properties of recycled concrete under high temperature. By presenting a comprehensive overview of the latest research on recycled concrete under high temperature or fire conditions since 2006, this paper serves as an essential reference for practitioners and researchers, connecting current research areas with future trends.