WATER DAMAGE RESISTANCE OF LOW-TEMPERATURE MODIFIED ASPHALT MIXTURE

This paper analyzes the influence law of water damage on the strength and stability of low-temperature modified asphalt mixture, and discusses the action mechanism of raw material characteristics, mix proportion design, construction technology and environmental factors on water stability. The research shows that the water damage of low-temperature modified asphalt mixture is mainly caused by asphalt film peeling, aggregate softening and internal structure damage due to water intrusion; the addition of modified components such as rubber powder and polymer resin can significantly improve the water damage resistance of the mixture; optimizing the asphalt-aggregate ratio, improving the aggregate gradation and adopting reasonable construction temperature control measures can effectively reduce the risk of water damage.