A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Optical and durability performance of near-infrared reflective coatings for cool pavement: Laboratorial investigation
https://orcid.org/0000-0001-7115-1373
Abstract 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 multi-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.
Highlights Near-infrared reflective pigments were applied in colored cool pavement coatings. The effect of near-infrared reflective pigments on coatings' optical properties were investigated. Comprehensive durability performance of pavement coating was investigated. The optimal formula of cool pavement coatings was determined.
Optical and durability performance of near-infrared reflective coatings for cool pavement: Laboratorial investigation
https://orcid.org/0000-0001-7115-1373
Abstract 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 multi-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.
Highlights Near-infrared reflective pigments were applied in colored cool pavement coatings. The effect of near-infrared reflective pigments on coatings' optical properties were investigated. Comprehensive durability performance of pavement coating was investigated. The optimal formula of cool pavement coatings was determined.
Optical and durability performance of near-infrared reflective coatings for cool pavement: Laboratorial investigation
https://orcid.org/0000-0001-7115-1373
Abstract 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 multi-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.
Highlights Near-infrared reflective pigments were applied in colored cool pavement coatings. The effect of near-infrared reflective pigments on coatings' optical properties were investigated. Comprehensive durability performance of pavement coating was investigated. The optimal formula of cool pavement coatings was determined.
Optical and durability performance of near-infrared reflective coatings for cool pavement: Laboratorial investigation
Xie, Ning (author) / Li, Hui (author) / Zhao, Wenzhong (author) / Zhang, Chao (author) / Yang, Bing (author) / Zhang, Hengji (author) / Zhang, Yi (author)
Building and Environment ; 163
2019-08-07
Article (Journal)
Electronic Resource
English
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