Road Performance and Antifreeze Property of Antifreeze Micro-surfacing Asphalt Mixture

To delay the snow or ice forming on road pavement, as well as to prevent the pavement-ice bonded layer, antifreeze micro-surfacing asphalt mixtures were designed based on the volume displacement method. Two types of asphalt mixture replaced with aggregate-salt and filler-salt were investigated by Cantabro test, loading wheel test, abrasion test, texture depth test, and conductivity test respectively. Results indicate that the abrasion test value increase by the addition of salt, meanwhile, the rutting ratio increases and the texture depth of the surface is reduced. It is suggested that the engineering performance of micro-surfacing containing filler-salt is better than that of containing aggregate-salt. In actual application, the mixture’s type, salt content, environmental temperature and service time have great impacts on the antifreeze performance of antifreeze micro-surfacing asphalt mixtures.