Attenuation pattern of skid resistance of heat reflective coatings under the effect of simulated pavement abrasion

ABSTRACT

The cooling performance of heat reflective coatings (HRC) for pavement applications has attracted wide attention. In this study, the cooling performance and bond strength of HRC were investigated and the attenuation pattern associated with the skid resistance of specimens sprayed with different amounts of HRC coating was examined based on four-wheel wear test. Furthermore, an asymptotic model associated with the attenuation of the HRC’s skid resistance was developed for investigating the effects of anti-slip particle gradation and dosage as well as HRC dosage on the skid resistance. The results show that the cooling performance and bond strength of HRC (sprayed amount: 0.8 kg/m²) are 12.4 °C and 1.75 MPa, respectively, and the skid resistance of HRC sprayed with different amounts of HRC was stabilised at approximately 48 BPN after 150,000 abrasion cycles. The attenuation pattern of the skid resistance of the skid-resistant HRC (SHRC) fitted well with the developed asymptotic model, showing a correlation coefficient exceeding 0.99 and an error of less than 5% from the test value. Anti-slip particle gradation (G4), anti-slip particle dosage (0.6 kg/m²) and HRC dosage (0.6 kg/m²) were selected based on the stable value of the skid resistance, and SHRC was developed for pavement applications.

KEYWORDS:

• Skid-resistant heat reflective coating
• asphalt pavement
• skid resistance
• four-wheel wear test
• asymptotic model
• attenuation pattern

Disclosure statement

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

Additional information

Funding

This work was supported by the Science and Technology Project of the Zhejiang Provincial Department of Transportation: [Grant Number 2021042]; the Science and Technology Project of the Shannxi Provincial Department of Transportation: [Grant Number 20-02k].