Pavement performance of light-coloured composite-modified binder and mixture for tunnel applications

Le résumé fourni par la source

Traditional asphalt pavements absorb substantial light and lower luminance contrast inside tunnels, causing visual fatigue for drivers. Light-coloured pavements enhance light reflection to improve tunnel visual environments and traffic safety. This study prepares a light-coloured composite-modified binder using naphthenic oil, C9 resin, SBS and EVA through a dedicated light-coloured synthesis process. Response Surface Methodology (RSM) quantifies the effects of synthesis parameters and identifies the optimal formulation: an oil-resin ratio of 1.69, 6.05 wt% SBS and 11.67 wt% EVA. Conventional performance, DSR and BBR tests confirm the binder meets SBS I-C asphalt specifications. A 16-mm nominal maximum aggregate size dense-graded light-coloured mixture containing 30% TiO2 exhibits uniform TiO2 distribution and excellent high-temperature, low-temperature and moisture stability. Evaluations via the HSV colour model show its brightness value is 2.6 times that of conventional asphalt, demonstrating remarkable lightening performance.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.