Durability of a heat-reflective coating on an asphalt pavement

Abstract

A heat-reflective coating can be used to solve various problems, including rutting and deformation caused by the excessively high asphalt pavement temperatures during summer. However, the durability of the heat-reflective coatings applied to asphalt pavement has not been extensively researched. The colour changes, crack development and attenuation of the cooling performance are studied along with the changes in skid resistance and cooling performance because of wear. Subsequently, the lifespan of the heat-reflective coating is predicted based on the results. This study indicates that the amount of spraying is positively correlated with the cooling performance. After 120 days of aging, a B–A type coating shows no cracks or any decay in performance. When the wear rate is less than 40%, the skid resistance of the coating meets the required specifications and the coating exhibits good cooling performance. The lifespan of the heat-reflective coating is predicted to be one year.

KEYWORDS:

• Road heat-reflective coating
• durability
• cooling performance
• light aging properties
• wear resistance

Acknowledgements

The authors gratefully acknowledge their financial support. And special thanks also go to Key Laboratory for Special Area Highway Engineering of Ministry of Education.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This research was supported by the scientific project from Henan Provincial Communication (Grant No. 2020J-2-2), and Scientific Research of Central Colleges of China for Chang'an University (Grant No. 300102218212).