Organic-inorganic-solid waste composite early strength agent, and preparation and application methods thereof

The invention belongs to the technical field of sleeper concrete additives, and relates to an organic-inorganic-solid waste composite early strength agent, a preparation method and an application method. The early strength agent comprises the following raw materials in parts by weight: 30-69 parts of an organic mixture, 30-69 parts of an inorganic mixture, 30-69 parts of solid waste and 0-3 parts of a compatilizer, the solid waste comprises an alkali-activated material and fly ash, and the alkali-activated material is Bayer process red mud and carbide slag. The composite early strength agent is prepared by combining organic, inorganic and solid wastes, the defects of the organic-inorganic early strength agent can be effectively made up, the compatilizer is added, and a molecular bridge is built, so that the interface interaction among the organic, inorganic and solid wastes can be effectively improved under the action of normal temperature and normal pressure, the compatibility among the three types of early