High-viscosity modified asphalt and preparation method thereof

The invention discloses high-viscosity modified asphalt and a preparation method thereof. The high-viscosity modified asphalt is prepared from the following components in parts by mass: 100 parts of matrix asphalt, 8-15 parts of a high-viscosity asphalt modifier, 0-8 parts of SBS (Styrene Butadiene Styrene) and 1-4 parts of a stabilizer. The preparation method comprises the following steps: adding the high-viscosity asphalt modifier and the SBS into the matrix asphalt, uniformly stirring, swelling, shearing, developing again, finally adding the stabilizer, and uniformly stirring to obtain the high-viscosity modified asphalt. The high-viscosity modified asphalt prepared by the invention has higher adhesiveness and stronger stripping resistance, and can be widely applied to thin-layer asphalt overlays. The problems of looseness, pit slots and the like of the thin-layer asphalt overlay can be effectively solved, and the service life of the pavement is prolonged. 本发明公开了一种高粘改性沥青及其制备方法。所述的高粘改性沥青按质量份计，由100份基质沥青、8-15