Concrete for thermal damage tunnels

The invention relates to the technical field of building materials, in particular to concrete for thermal damage tunnels. The concrete comprises the following raw materials by weight: 250-340kg/m of anti-crack self-repairing cement; 30-120 kg/m of mineral powder; 20-50kg/m of silica fume; 10-45 kg/m of fly ash floating beads; 35-140kg/m of light ceramsite; 2-5 kg/m of a water-retaining agent; and 3.1-3.4 kg/m of a water reducing agent. The anti-crack self-repairing cement is prepared from 90-95% of anti-crack self-repairing cement clinker and 5-10% of dihydrate gypsum. The anti-cracking self-repairing cement clinker is prepared from 4-8% of periclase and 1-5% of gamma-C2S, and the periclase with the size of 3-5 microns accounts for 0.4-1.2%. The concrete can effectively solve the problem of structural damage of lining concrete in the early stage, can reduce the width of cracks in the later stage, has a heat preservation and insulation function, and can reduce the temperature of the operation environment to a