Analysis on factors affecting the cooling effect of optical shielding in pavement coatings

Si Wei; Yin Yike; Hu YongpingKang XingxiangXu YinshengShi AnyeZhang BowenLiu Jiayao

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Analysis on factors affecting the cooling effect of optical shielding in pavement coatings

机译：Analysis on factors affecting the cooling effect of optical shielding in pavement coatings

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Inspired by transparent heat-shielding research, three tungsten bronze nanoparticles (i.e., nano-cesium tungsten bronze (Cs0.3WO3), nano-sodium tungsten bronze (Na(0.2)8WO(3)) and nano-potassium tungsten bronze (K0.26WO3)) with excellent near-infrared light absorption properties were applied for the first time to prepare pavement coatings so as to alleviate the temperature-related damage of pavement and urban heat island effect. X-ray diffraction (XRD), scanning electron microscopy (SEM), ultraviolet-visible-near infrared spectrometer (UV/VIS/ NIR), self-made indoor simulated solar radiation apparatus were employed in this research to study the application of nano tungsten bronze into pavement, as well as its benefit. It was found that the solar reflectivity of the coating is between 3.22% and 6.29%, which is very close to that of asphalt binder, which is 5.24%. The coating made of Cs0.3WO3 nanoparticles reduced the temperature most significantly among all specimens, and the combination of theoretical optimal cooling effect was determined. The correlation between the temperature rising value of the specimen coated with the most effective coating and that of the control specimen was established, which provided a basis for predicting the cooling value of the coating.

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来源
《Building and environment》 |2022年第3期|108766.1-108766.13|共13页
作者
Si Wei; Yin Yike; Hu YongpingKang XingxiangXu YinshengShi AnyeZhang BowenLiu Jiayao;
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作者单位

Changan Univ, Sch Highway, Xian 710064, Shaanxi, Peoples R China|Guangxi Univ, Guangxi Key Lab Disaster Prevent & Engn Safety, Nanning 530004, Guangxi, Peoples R China;

Changan Univ, Sch Highway, Xian 710064, Shaanxi, Peoples R China;

Univ Nottingham, Nottingham Transportat Engn Ctr, Dept Civil Engn, Nottingham NG7 2RD, EnglandWuhan Univ Technol, State Key Lab Silicate Mat Architectures, Wuhan 430070, Hubei, Peoples R ChinaCornell Univ, Syst Engn Coll Engn, Ithaca, NY 14853 USAHunan Prov Commun Planning Survey & Design Inst C, Changsha 410200, Hunan, Peoples R China;

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正文语种英语
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Nano-tungsten bronze; Coating; Photothermal performance; Asphalt pavement; Asphalt mortar;

Analysis on factors affecting the cooling effect of optical shielding in pavement coatings

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