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- Title
Study on the Photothermal Performance of a "Thermal Shielding" Coating Using Tungsten Bronze as Functional Material for Asphalt Pavement.
- Authors
Zhang, Ling; Ding, Pan; Si, Wei; Kang, Xingxiang; Zhang, Hongfei; Gu, Qiutai
- Abstract
Asphalt pavements absorb more than 90% of the incident solar radiation, which induces not only high-temperature degradation but also the urban heat island (UHI) effect. In this study, a novel nanoscale non-stoichiometric compound containing tungsten (MxWO3) was used for the first time to prepare thermal shielding coatings to reduce the temperature of pavements and mitigate the UHI effect. Coatings with good shielding characteristics were selected for outdoor thermal insulation tests to evaluate their properties. MxWO3 (M = K, Na, Cs) exhibited significant thermal shielding, especially CsxWO3. Outdoor thermal insulation tests were performed for the CsxWO3 coatings, and it was found that the greater the doping, the more significant the thermal shielding effect. Compared with untreated pavements, the surface-coated pavement exhibited significant cooling at 5 cm and 15 cm depth-wise, which reduced the overall pavement temperature by 1–2 °C, and the coating thickness affected the cooling effect.
- Subjects
THERMAL shielding; ASPHALT pavements; TUNGSTEN bronze; THERMAL insulation; URBAN heat islands; NONSTOICHIOMETRIC compounds; TUNGSTEN
- Publication
Materials (1996-1944), 2023, Vol 16, Issue 22, p7150
- ISSN
1996-1944
- Publication type
Article
- DOI
10.3390/ma16227150