Influence of Heat Reflective Coating on the Cooling and Pavement Performance of Large Void Asphalt Pavement
| Autor: | Junan Lei, Shoubin Wang, Xiaobao Chen, Nanxiang Zheng, Zhifeng Li |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Void (astronomy)
Materials science heat reflective coating 0211 other engineering and technologies 02 engineering and technology engineering.material Paint adhesion testing cooling performance chemistry.chemical_compound 0203 mechanical engineering Asphalt pavement Coating 021105 building & construction Materials Chemistry Composite material pavement performance Test equipment Surfaces and Interfaces Durability Surfaces Coatings and Films large void asphalt mixture 020303 mechanical engineering & transports chemistry lcsh:TA1-2040 Asphalt Titanium dioxide engineering lcsh:Engineering (General). Civil engineering (General) |
| Zdroj: | Coatings Volume 10 Issue 11 Coatings, Vol 10, Iss 1065, p 1065 (2020) |
| ISSN: | 2079-6412 |
| DOI: | 10.3390/coatings10111065 |
| Popis: | To reduce the temperature of asphalt pavement in summer, and alleviate the urban heat island effect, a comprehensive method of combining a heat reflective coating and large void asphalt pavement was proposed. Using the developed coating cooling test equipment, the cooling effect of the coating on a large void asphalt mixture was studied in six different proportions, four different colors, and four different dosages, and the durability of the coating was verified by abrasion tests. Finally, the best dosage of the coating was recommended through an adhesion test of the coating, and a water permeability and anti-skid performance test of the pavement. The results show that the reflectivity of the coating can be improved by adding functional fillers, of titanium dioxide and floating beads, into the coating. The order by reflectivity and cooling effect of the four color coatings was green > red > gray > blue, and the maximum cooling value of the green coating reached 9.7 ℃. The cooling performance of the coating decreased with the increase of wear time, and the rate of decrease was fast, then slow, and finally tended to be stable after 20,000 times wear. The coating reduced the anti-skid performance and the water permeability coefficient of large void asphalt pavement, but still maintained a high level. The green coating with 15% titanium dioxide and 10% floating beads is recommended as the cooling coating for large void asphalt pavement, and its dosage should be controlled at about 0.4&ndash 0.8 kg/m2. |
| Databáze: | OpenAIRE |
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