Experimental Study of High-Performance Deicing Asphalt Mixture for Mechanical Performance and Anti-Icing Effectiveness

摘要

This paper aims to design high-performance deicing asphalt mixture based on a combination of deicing agent and high-performance modifier. The deicing asphalt mixtures were produced by replacing mineral fillers with deicing agents in the asphalt mixture. The high-performance modifier increases cracking resistance and high-temperature rutting resistance of asphalt binder. The mechanical performance of asphalt mixtures, including high-temperature stability, low-temperature cracking resistance, and moisture stability were evaluated using wheel tracking test, low-temperature flexural test, immersion Marshall test, and freeze-thaw splitting test. The deicing effects of asphalt mixtures were evaluated using an ice-layer rupture test, pull-off test, and interface shear test. It was found that as the content of deicing agent increases the deicing effectiveness is stronger while the mechanical performance degraded. The addition of high-performance modifier can remarkably improve mechanical performance of deicing asphalt mixture while cause negligible effect on the deicing effectiveness. The combination of deicing agent and high-performance modifier provides a promising way to design high-performance deicing asphalt mixture. (C) 2018 American Society of Civil Engineers.