High-residual-ductility blended asphalt and preparation method thereof

The present invention discloses a high residual ductility blended asphalt and a preparation method thereof, and relates to the technical field of blended asphalt preparation, the blended asphalt comprises the following components by weight: 22-30 parts of FCC oil slurry; 32-39 parts of vacuum residue; 34 to 41 parts of deoiled asphalt; 2-10 parts of a fluorine-containing additive; and 1-6 parts of a chemical additive. According to the present invention, the fluorine-containing additive-chemical auxiliary agent compatibility method is adopted, such that the compatibility of the asphalt component and the modifier is improved, and the viscosity of the modified asphalt is reduced so as to facilitate subsequent processing and use, such that the modified asphalt meets various requirements on the AH-70 asphalt product in the standard Heavy-duty Road Petroleum Asphalt (GB/T 15180-2010), the residual ductility performance after aging is particularly outstanding, and the residual ductility after aging is gt; and the re