Discretization and assembly connection technology of cement concrete pavement structure: A review

Precast concrete pavements (PCPs) represent an innovative solution in the construction industry, addressing the need for rapid, intelligent, and low-carbon pavement technologies that significantly reduce construction time and environmental impact. However, the integration of prefabricated technology in pavement surface and base layers lacks systematic classification and understanding. This paper aims to fill this gap by introducing a detailed analysis of discretization and assembly connection technology for cement concrete pavement (CCP) structures. Through a comprehensive review of domestic and international literature, the study classifies prefabricated pavement technology based on discrete assembly structural layers and presents specific conclusions (i) surface layer discrete units are categorized into bottom plates, top plates, plate-rod separated assemblies, and prestressed connections, with optimal material compositions identified to enhance mechanical properties; (ii) base layer discrete units include block-type, plate-type, and beam-type elements, highlighting their contributions to sustainability by incorporating recycled materials (iii) planar assembly connection types are assessed, ranking them by load transfer efficiency, with specific dimensions provided for optimal performance; and (iv) vertical assembly connections are defined by their leveling and sealing layers, suitable for both new constructions and repairs of existing roads. The insights gained from this review not only clarify the distinctions between various structural layers but also provide practical guidelines for enhancing the design and implementation of PCP. This work contributes to advancing sustainable and resilient road construction practices, making it a significant reference for researchers and practitioners in the field.