Asphalt pavement material additive, self-repairing asphalt pavement and preparation method

The invention relates to an asphalt pavement material additive, a self-repairing asphalt pavement and a preparation method, and belongs to the technical field of self-repairing asphalt. The additive is formed by mixing silver nanowire modified microcapsules and a composite material of an asphalt regenerant and porous calcium carbonate. When asphalt cracks under the external action, the wall of the microcapsule is stimulated to crack, the photo-thermal dual-curing resin system in the microcapsule is released, the resin system flows into the crack, and the photo-thermal dual-curing behavior is generated under the sunlight irradiation and the heat energy converted from the sunlight irradiation, so that the asphalt microcracks are repaired, the asphalt performance is improved, and the service life of the asphalt is prolonged. The service life is prolonged. And the composite material of the asphalt regenerant and the porous calcium carbonate starts to slowly release the asphalt regenerant for a long time when the