This product is processed by heavy oil from oil refinery, the softening point and needle penetration of building petroleum asphalt is moderate, better solubility property, with shiny, elasticity, plasticity, insulation, moisture proof and good thermal stability. Road asphalt has strong cohesiveness, good low temperature performance, strong anti-cracking in road surfacing and good thermal stability, and has moisture-proof, anti-corrosion, insulation and other features. Cationic emulsion road petroleum asphalt is a new product for cold penetration construction, uniform texture, low vicidity, strong infiltration capacity and easy to wrap tied for even distribution on stone surface. It is easy to heating up to 140℃, and without the heating insulation problem, to reduce environmental pollution, and good cohesive force, to reduce the amount of asphalt, energy conservation, lower construction cost and can extend the construction period, the construction is simple, to improve effectiveness. Product physical and chemical properties: Average molecular weight of oxidated asphalt: 5000~60000 Components of oxidated asphalt: Heavy oil: 5%~15% Relative density: 0.96~1.05 Colloid: 40%~60% Asphaltene: 30%~40% Expansion coefficient: 5.5×10﹣4～6.3×10﹣4/℃