Investigation of chloride release characteristic of Chlorine-Based Anti-Icing asphalt mixture

Abstract

Anti-icing asphalt pavement is an effective way to alleviate snow and ice disasters in winter roads, and the release characteristics of active ingredients determine the snow melting effect of the asphalt pavement. By using the ion-selective electrode (ISE) method, the cumulative release concentration and single release concentration were used as indicators to analyze the macro release characteristics of the snowmelt active ingredients, chloride ions. The release of chloride goes through the rapid release stage, stable release stage, and release stop period. The effects of asphalt mixture type, asphalt type, and temperature on the macro release characteristics were also discussed. In order to explain the release characteristic of active ingredients at a molecular level, a simulation system of asphalt and finite components were developed with the help of molecular dynamics research methods. The absorption and diffusion characteristics of active ingredient and asphalt at the molecular scale were explored in combination with variations in binding energy, radial distribution function, and chloride diffusion coefficient. The effects of temperature, pressure, and the agent proportion on the micro-release characteristics of active ingredients were clarified.