Study on Performance and Structural Optimization of Concrete Bridge Deck Pavement Materials in Hot and Humid Areas

This paper investigated the durability and structural performance of concrete bridge deck pavements under high temperature and high humidity conditions, focusing on three aspects: mix design, road performance evaluation, and structural optimization design. Through Marshall testing, the surface layer material SMA-13 and the middle layer material AC-13 were identified as suitable for hot and humid climates. The former exhibited excellent high-temperature stability and resistance to water damage, while the latter possessed good structural density and load-bearing capacity. A combination of high-temperature, low-temperature, water stability, and impermeability tests was used to systematically evaluate the adaptability of the mixture in hot and humid environments. Furthermore, the performance of different interfacial bonding materials was analyzed through interlaminar pull-out and direct shear tests. The results revealed that the incorporation of epoxy resin notably enhanced the interlayer bond strength and overall durability of the pavement system in hot and humid environments. The proposed "SMA-13 + epoxy resin + AC-13" configuration demonstrates promising potential for improving the mechanical performance and service life of concrete bridge deck pavements.