Capsule type low-carbon auxiliary agent as well as preparation method and application thereof

The invention discloses a capsule type low-carbon additive as well as a preparation method and application thereof, and belongs to the technical field of road engineering. The capsule type low-carbon auxiliary agent takes porous silicon dioxide infiltrated into the liquid composite smoke suppressant as a capsule core material; a closed polyurethane prepolymer is used as a capsule wall material; and finally, packaging a capsule stabilizer to prepare the capsule type low-carbon additive. According to the invention, a capsule packaging technology is innovatively adopted, a main component (closed polyurethane prepolymer) is used as an outer layer structure, a secondary component is used as an inner layer structure, so that the use efficiency of the capsule reaches 100%, and the main component accounts for more than 80% of the capsule structure. The capsule-type low-carbon additive is designed into a capsule packaging form, so that the construction efficiency and the asphalt modification effect can be greatly impr