Special admixture for shotcrete

The invention discloses an admixture special for shotcrete. The admixture special for shotcrete is prepared from the following raw materials in parts by weight: 800 to 900 parts of superfine silicon powder, 50 to 100 parts of a super-plasticizing powder agent, 2 to 5 parts of a sodium polyacrylate adhesive, 0 to 0.05 part of a polysiloxane surfactant, 0 to 6 parts of a powder slump retaining agent, 0 to 4 parts of sodium gluconate, 0 to 100 parts of aluminum sulfate and 0 to 100 parts of sodium hydroxide. The invention discloses application of the special admixture for shotcrete in shotcrete construction. The strength and the binding power of each age are improved; the springback rate of shotcrete is reduced; concrete can be normally sprayed in the water-rich area; achievements reach the domestic leading level; the admixture special for shotcrete can be directly applied to tunnel primary support construction; a new technical way is opened up for primary support construction, experienceworthy of reference is p