Abstract
Considering the influence of road icing on traffic safety in winter, a pavement surface treatment technology with groove-filled polyurethane rubber particle elastomer (PRPE) was proposed. The optimum ratio of PRPE was determined by testing the mechanical properties, bonding properties and construction properties. Then the bonding durability, ice-breaking performance and skid resistance of PRPE were tested. The results showed that 40 mesh rubber particles, 60% polyurethane binder content, 3‰ catalyst and 5% diluent were selected as the optimal ratio of PRPE. Three test environments (Freeze-thaw, High temperature and immersion, High temperature and immersed in saltwater) have no obvious influence on the interface bonding performance of PRPE, only a slight reduction. The ice-breaking effects of the four pavement types are in order the PRPE and groove level > the PRPE lower than groove > the PRPE higher than groove > the grooved pavement (unfilled). Finally, through BPN and friction coefficient test, the skid resistance performance of the three pavement types under dry, wet and icing conditions is verified. Compared with the AC-13 asphalt mixture, the skid resistance of groove-filled pavement is improved by 4.5%, 10.8% and 24.6% under dry, wet and icing conditions respectively.
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