Study on the Effect and Mechanism of Different Snowmelt Agents on Asphalt

Abstract This article explores the effects of different types of snow-melting agents on the high-temperature performance, low-temperature performance, rheological properties, and creep properties of asphalt in order to better understand the mechanism of different types of snow-melting agents on asphalt. Chlorine salt snow-melting agent solution, nonchlorine salt snow-melting agent solution, and mixed snow-melting agent solution were prepared, respectively, and the erosion of asphalt was carried out by periodic immersion test method. Then, through the penetration test, ductility test, softening point test, dynamic shear rheological test, and multi-stress recovery creep test, the effects of different types of snow-melting agents on the high-temperature performance, low-temperature performance, rheological properties, and creep properties of asphalt were investigated. Finally, the mechanism of action of different types of snow-melting agents on asphalt was analyzed by scanning electron microscopy, infrared spectroscopy, and differential scanning calorimetry. The results show that the chloride snow-melting agent has the greatest influence on the high-temperature performance, low-temperature performance, rheological properties, and creep properties of asphalt, followed by the mixed snow-melting agent, and the nonchloride snow-melting agent has the least influence on the high-temperature performance, low-temperature performance, rheological properties, and creep properties of asphalt. From the macroscopic experiment, microscopic experiment, and mechanism analysis of this article, it is suggested that nonchlorine salt snow-melting agent should be used in snow removal on snowy road surface.