Wear Behavior and Skid-Resistance Durability of Runway Pavements Based on Surface Texture Characteristics

To better understand the evolution of skid resistance on airport asphalt runways, this study investigates the long-term skid resistance durability of epoxy asphalt mixtures containing steel slag under high-temperature conditions. An indoor abrasion device was modified to simulate wear, applying a contact pressure of 1.5 MPa. The surface texture evolution and skid resistance degradation patterns under different steel slag contents were explored using indicators such as Mean Profile Depth (MPD), Bearing Area Ratio (Smr ), and British Pendulum Number (BPN). Additionally, the mechanisms of differential polishing were analyzed by examining the microstructure and mineral composition of the aggregates. The results indicate that the differences in mineral composition between steel slag and basalt lead to differential polishing during use, which enhances the long-term wear resistance of the asphalt mixture for airport runways. Under high temperature and pressure conditions, the epoxy asphalt mixture effectively maintains its structural integrity without significant rutting, making it suitable for airport runways. A steel slag content of 25–50 % performs well in terms of long-term skid resistance durability. This provides useful guidance for the skid resistance safety assessment of epoxy asphalt mixtures used in airport runways.