Research on aggregate bonding mechanism and performance optimisation of epoxy asphalt surfacing based on spalling resistance test

Epoxy Asphalt Surfacing (EAS) boasts outstanding durability and skid resistance for high-grade pavements, yet weak binder-aggregate interfacial adhesion triggers early aggregate spalling, deteriorating surface texture and long-term anti-slip capacity. Existing research suppresses spalling mainly through binder modification and mixture design, lacking systematic quantitative analyses on how steel wheel rolling (SWR) and rubber wheel rolling (RWR) affect EAS anti-spalling property and texture evolution. This study fills the gap by investigating compaction effects on spalling resistance, 3D texture and skid resistance. A self-designed spalling test quantifies interfacial bonding stability under varied rolling parameters, and the British Pendulum Test (BPT) links micro-texture features to British Pendulum Number (BPN). Proper compaction greatly improves interfacial bonding and anti-spalling performance; SWR and RWR produce distinct texture modification effects. Parameter g precisely describes micro-texture variation, and all texture indices show prominent linear correlations with skid resistance. This work distinguishes compaction mechanisms of two rollers, quantifies property changes with rolling passes and determines optimal rolling schemes, offering theoretical support for EAS field compaction and anti-skid pavement design.