Preparation and Properties of New Thermal Reflective Coating for Asphalt Pavement

HIGHLIGHTS: What are the main findings? A new heat reflective coating material for asphalt pavement was obtained. The inorganic filler with lipophilicity after surface modification was obtained. A double coating structure with better cooling effect is obtained. A heat reflective coating with excellent road performance was obtained. What is the implication of the main finding? Compared with the traditional heat reflection coating, it has better physical and chemical properties and lower cost. Make the inorganic filler better dispersed in the matrix. The higher the temperature, the better the cooling effect of the coating. After the heat-reflective coating is laid, its skid resistance, wear resistance and impermeability meet the requirements of the specification, and the performance is improved. ABSTRACT: This paper aims to study the applicability of an epoxy resin modification to improve its anti-aging properties, which are conducive to road performance. To achieve this goal, a wide range of laboratory activities were conducted, including an emulsion mixed with epoxy resin and liquid phenolic resin as the coating substrate; surface-modified titanium dioxide, silica, hollow glass beads and sericite powder as functional fillers; then adding pigments and various additives to prepare a new asphalt pavement heat-reflective coating. Secondly, the optimum brushing amount of the coating was obtained, and the cooling effect was clarified. Finally, the road performance was evaluated by testing the coating’s skid resistance, wear resistance and impermeability. The results show that the skid resistance, abrasion resistance and impermeability of the heat reflection coating meet the specification requirements.