Salt-Retaining Asphalt Mixture Technology for Melting Snow and Ice

Compared with many active snow melting and de-icing technologies, salt-storing asphalt pavements offer higher engineering application value due to their simple construction and cost-effectiveness. The incorporation of salt-storing materials into asphalt mixtures enhances the active snow and ice melting performance of the pavement but may adversely affect its serviceability. To further improve the comprehensive performance of salt-storing asphalt mixtures, this paper systematically summarizes the research progress on salt-storing materials, the pavement performance of salt-storing asphalt mixtures, and their snow and ice melting performance from three aspects: the development of salt-storing materials, the pavement performance of salt-storing asphalt mixtures, and their snow and ice melting performance. First, the types of salt-storing materials and the research progress of various salt-storing materials with different carriers are classified and introduced. Second, the design of mixtures and the impact of different salt-storing materials on pavement performance are reviewed. Additionally, the evaluation methods for snow and ice melting performance of salt-storing asphalt mixtures and long-term prediction methods for snow and ice melting performance are summarized, and future research directions are outlined.