Cement concrete strength promoter and preparation method thereof

The invention specifically relates to a cement concrete strength promoter and a preparation method thereof, belonging to the technical field of building materials. The cement concrete strength promoter is prepared from the following raw materials by weight: 10 to 60 parts of a cement mortar dehydrated phase, 15 to 70 parts of metakaolin, 1 to 50 parts of phosphogypsum, 0.1 to 5 parts of a water reducer and the like. According to the invention, since solid waste is used as a raw material, full and high-added value utilization of the solid waste is realized, and the prepared cement concrete strength promoter can effectively improve the strength of cement concrete at early, middle and later stages. The cement concrete strength promoter is used to substitute 5 to 15% of cement, and the strength of obtained cement concrete is improved by more than 40% in 28 d compared with the strength of reference concrete. The cement concrete strength promoter provided by the invention has the advantages of low cost for the raw materials and convenience in usage and can be extensively applied in rush-pair projects for ports and piers, highways, railways, bridges, airfield runways and the like.