Study on water stability of asphalt binder with medium weathered igneous rock

Aiming at the problems of weak acidity medium weathered igneous rock around Nairobi, Kenya, poor adhesion with asphalt and water stability binder, article studied use anti-stripping agent, cement, hydrated Lime other technical measures to improve binder rock. The results showed that 48h Marshall residual benchmark without any was 78.5%, which did not meet standard requirements. can be significantly improved by adding anti stripping cement Lime. After freeze-thaw cycles, splitting tensile strength decreased obviously, TSR values anti-spalling from small large were K-4, K-3, K-2, K-6 K-5. mixed agent alone had relatively durability, strongest ability resist deformation when immersed in water.