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首页> 外文期刊>Building and Environment >Optical and durability performance of near-infrared reflective coatings for cool pavement: Laboratorial investigation
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Optical and durability performance of near-infrared reflective coatings for cool pavement: Laboratorial investigation

机译：用于凉爽路面的近红外反射涂层的光学和耐久性能：实验室研究

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摘要

Coating with high reflectance applied on pavement is an effective way of cool pavement to improve the outdoor thermal comfort and mitigate the urban heat island effect. Cool coating with high near-infrared reflectance is potential to improve the reflectance without affecting the visual environment or causing glare issue. Limited research focused on the near-infrared reflective coatings for pavement and its comprehensive pavement durability performance. This study applied pavement coatings with near-infrared fillers and pigments to obtain high near-infrared reflectance. The orthogonal experimental design method combining the mull-index integrated evaluation method (MIEM) and the single index balanced evaluation method (SBEM) were applied to optimize the formula of coatings with superior comprehensive performance. The optical performance and durability performance including the skid-resistance, anti-abrasion, and film hardness were investigated. The results showed that the near-infrared TiO2 is one type of near-infrared reflective pigment with the bigger particle size and greater bandgap than the energy of near-infrared solar radiation. The near-infrared reflectance of coatings increased first and then decreased with the increase of near-infrared titanium oxide. The optimal proportion of red iron oxide, R-TiO2 and NIR-TiO2 is 5:25:8, which has the superior comprehensive performance of optical properties and pavement durability performance. The near-infrared reflectance could reach 60% and the pavement performance all meet the requirement in practical application. This study will provide useful insights for the development of cool pavement in dark color with high reflection to mitigate the urban heat island effect.
机译：在人行道上施加高反射率涂层是凉爽人行道的一种有效方法，可以改善室外热舒适性并减轻城市热岛效应。具有高近红外反射率的冷涂层可以在不影响视觉环境或引起眩光的情况下提高反射率。有限的研究重点在于用于路面的近红外反射涂层及其全面的路面耐久性能。这项研究应用了具有近红外填料和颜料的路面涂料，以获得高近红外反射率。采用正交试验设计方法，结合考虑了多指标综合评价法（MIEM）和单指标平衡评价法（SBEM），优化了综合性能优异的涂料配方。研究了光学性能和耐久性能，包括防滑性，耐磨性和膜硬度。结果表明，近红外二氧化钛是近红外反射型颜料的一种，其粒径和带隙大于近红外太阳辐射能。随着近红外氧化钛的增加，涂层的近红外反射率先上升，然后下降。红色氧化铁，R-TiO2和NIR-TiO2的最佳比例为5：25：8，具有优异的综合光学性能和路面耐久性能。近红外反射率可达60％，路面性能均满足实际应用要求。这项研究将为开发深色高反射凉爽路面以减轻城市热岛效应提供有用的见识。

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