The thermal-reflective coating technology can effectively realize the active cooling of asphalt pavement, thus delaying the occurrence of pavement rutting. Although solid fillers are usually used to absorb light and weaken light dazzle in traditional thermal-reflective coatings, this method makes the filler component complicated and the coatings more viscous and increases the difficulty of painting the coating material on the pavement surface. On account of all the aforementioned factors, this experimental study aims to effectively improve the performance of the thermal-reflective coating with liquid silicone rubber addition in which epoxy resin is the base material and rutile titanium dioxide is the pigment filler for the coating film. Through lab experiments, the effects of the proper liquid silicone rubber dosage on the glossiness, cooling performance, and hardness of the thermal-reflective coating are studied and analyzed. The experimental results show that the liquid silicone is very effective for coating toughness improvement. The thermal-reflective coating, when the liquid silicone rubber dosage changes from 10 to 14 wt%, exhibits a matt state, and its glossiness can be controlled below 30 GU, which meets the safety and antiglare requirements of traffic vehicles. It demonstrates that liquid silicone rubber can influence the viscosity of the thermal-reflective coatings, and when the liquid silicone dosage reaches 16 wt%, the viscosity of the coating increases by 7.26 wt% less than that of the solid matting filler. Liquid silicone rubber can also influence the cooling effect of the thermal-reflective coatings, with the liquid silicone rubber dosage of 16 wt%, the asphalt pavement temperature can reduce 0.5°C. Besides, liquid silicone rubber reduces the hardness of the coatings, the coating hardness is 6H when the liquid silicone rubber dosage is 0–10 wt%, and the hardness of the coating reduces to 5H when liquid silicone dosage is from 12 to 16 wt%, which meets the actual requirements. Therefore, this article recommends a 12 wt% dosage of the liquid silicone rubber to be used as a matting filler for the thermal-reflective coatings.

中文翻译：

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路面用液态硅橡胶热反射涂料的性能试验研究

热反射涂层技术可有效实现沥青路面主动冷却，从而延缓路面车辙的发生。虽然在传统的热反射涂料中通常使用固体填料来吸收光线和减弱光眩，但这种方法使填料成分复杂，涂层更粘稠，增加了在路面表面涂装涂料的难度。综合以上因素，本实验研究旨在有效提高以环氧树脂为基材，金红石型二氧化钛为涂膜颜料填料的液态硅橡胶热反射涂层的性能。通过实验室实验，适当的液体硅橡胶用量对光泽度的影响，对热反射涂层的冷却性能和硬度进行了研究和分析。实验结果表明，液态有机硅对提高涂层韧性非常有效。热反射涂料在液态硅橡胶用量10～14wt%时呈哑光状态，光泽度可控制在30GU以下，满足交通车辆的安全防眩要求。结果表明，液态硅橡胶会影响热反射涂层的粘度，当液态硅橡胶用量达到16 wt%时，涂层的粘度比固体消光填料增加了7.26 wt%。液态硅橡胶也会影响热反射涂层的冷却效果，液态硅橡胶用量为 16 wt%，沥青路面温度可降低0.5°C。此外，液体硅橡胶降低了涂层的硬度，当液体硅橡胶用量为0-10 wt%时，涂层硬度为6H，当液体硅橡胶用量为12-16 wt%时，涂层硬度降低至5H ，符合实际要求。因此，本文推荐使用 12 wt% 的液态硅橡胶作为热反射涂层的消光填料。