Channel: Pavement Engineering http://zgglxb.chd.edu.cn EN-US http://zgglxb.chd.edu.cn/EN/current.shtml http://zgglxb.chd.edu.cn 5 0.3WO₃) were incorporated into epoxy resin to prepare a cooling coating for pavement optical shielding. The optical properties, cooling performance, and cooling mechanism of the coating were analyzed systematically. Firstly, surface modification of Cs_0.3WO₃ nanoparticles and preparation process optimization of coatings were performed to prepare an optical shielding coating with high uniformity. The dispersion of Cs_0.3WO₃ particles and their distribution in the coating before and after optimization were compared and analyzed. Secondly, the optical properties (including reflectivity (R) and transmittance (T)) and cooling performance (including maximum cooling value (C_max) and average cooling value (C_m)) of the coatings with different Cs_0.3WO₃ content were tested, and the change law of optical properties and cooling performance of the coatings were studied. Then, the optical indexes determining the cooling performance of the coating were confirmed, and the correlation between the cooling performance and dominating optical indexes was established, and the cooling mechanism of the coating was clarified. Thirdly, shielding rate (S), is proposed as a simpler and more suitable index to quantitatively characterize the shielding performance of the coating, and the change of the cooling performance of the coating with this index was studied. Finally, the bonding strength between the coating and pavement surface, skid-resistance of the coated specimen, and wear resistance of the coating were tested by laboratory experiments. The results show that Cs_0.3WO₃ surface modification and preparation process optimization of coatings can reduce the amount and volume of aggregate and improve the dispersion of Cs_0.3WO₃ in the coating. T and R of the coating decrease with increased Cs_0.3WO₃ content, and C_max and C_m increase with increasing Cs_0.3WO₃ content in the coating. T is a dominated index affecting the cooling performance of the coating, which is linearly negatively correlated with C_max and C_m. Based on the optical characteristics of the coating prepared in this study, S is more suitable than T as the key optical performance index of the coating, and S increases with increasing Cs_0.3WO₃ content and has a positive linear correlation with C_max and C_m. The 48-hour bond strength between No. 8 coating and asphalt concrete surface is 0.999 MPa. The coating with a dosage of 0.8 kg·m^-2 decreases the British Pendulum Number (BPN) of the specimen from 72 to 54. The wear life of the coating is approximately 100 000 times higher. The above results show that the developed coating meets the requirements related to the road performance of the coating.]]>