Multifunctional asphalt modifier and preparation method thereof

The invention belongs to the technical field of asphalt pavement materials, and particularly relates to a multifunctional asphalt modifier, which is prepared from the following raw materials in parts by mass: 12 to 25 parts of surface modified aerogel powder, 40 to 60 parts of surface modified tourmaline powder, 10 to 16 parts of multi-base porous polymer powder and 20 to 35 parts of zeolite powder. The surface-modified tourmaline powder can reduce the mixing temperature, reduce pollutants and play a role in cooling and deodorizing; the zeolite powder has an adsorption effect and can adsorb pollutants such as small solid particles in the asphalt smoke, so that a smoke suppression effect is achieved; the surface-modified aerogel powder and the multi-base porous polymer have a synergistic effect, so that a heat insulation effect is achieved. The invention also discloses a preparation method, so that powder with different particle sizes and properties is mixed more uniformly, and a better synergistic effect is a