Research on functional repairing material for asphalt pavement to resist condensate ice damage

As to the microscopic damage of asphalt mixture road surface caused by winter freezing in the Yunnan-Guizhou plateau region, the research on functional repair of asphalt pavement was carried out by developing adhesive and permeable materials in order to prevent fine aggregate from stripping and pitting. With SBR and G additive as modifiers, the study was focused on the changes of repairing materials in terms of physical properties, permeability and adhesion to different modifier. The results show that the permeability of repairing materials enhances rapidly with the increase of G additive, which does not have much effect on skid resistance of the original road surface, therefore, the remediation effect is enhanced. The evaporation residue has better elastic recovery, but the 5°C ductility is adversely affected. With increasing curing time, better performances in adhesion, water resistance and freeze-thaw resistance are obtained compared with samples without repairing materials added. This study is of significance in developing the preventive maintenance technology in areas with local characteristics.