Composition optimization and durability evaluation of waterborne resin polymer road surface colored anti-skid overlay

To address environmental concerns over volatile organic compound emissions from solvent-based resins in colored anti-skid overlays and promote their green, durable and sustainable development, this study developed eco-friendly adhesives using waterborne polyurethane (WPU), waterborne epoxy resin (WER), and waterborne acrylic (WA). Furthermore, they were combined with organosilicon resin reinforced colored ceramic particles to prepare colored anti-skid overlay with both color visual function and road performance of skid resistance and wear resistance. The amount of the adhesives and the composition of anti-skid aggregates were optimized, and the influence of adhesive type on the durability of colored anti-skid overlay was explored. The results showed that the addition of WER and WA improved the crosslinking and curing degree of WPU, and the macroscopic mechanical, bonding, and hydrophobic properties were enhanced. The recommended contents of WER and WA are 10%–15% and 5%–10%, respectively. According to the wet track abrasion value and texture depth of the colored anti-skid overlay, the recommended adhesive application amount is 2.5 kg/m 2 . The colored ceramic particles only use 2.36–4.75 mm particles. The wet track abrasion value of WER/WPU/WA anti-skid overlay is the least affected by various corrosion and aging treatments. The influence of alkali solution immersion and xenon lamp aging treatment is more significant, but its growth rate is still not more than 12%, showing better corrosion resistance and anti-aging performance. After 50,000 loading abrasion cycles, the British Pendulum Number of WER/WPU and WER/WPU/WA colored anti-skid overlay is 63–65, and the texture depth is 1.37–1.42 mm, still maintaining significant anti-skid performance.