Anti-crack concrete and preparation method thereof

The invention relates to the technical field of concrete, and particularly discloses anti-crack concrete and a preparation method thereof. The anti-crack concrete comprises the following raw materialsin parts by weight: 260-290 parts of cement; 60-80 parts of fly ash; 40-50 parts of mineral powder; 150-200 parts of water; 700-800 parts of a fine aggregate; 800-1000 parts of a coarse aggregate; 1-3 parts of a water reducing agent; 5-8 parts of a reinforcing agent; 3-4 parts of a shrinkage reducing agent; and 2-3 parts of modified epoxy resin; the shrinkage reducing agent comprises at least oneof isomeric fatty alcohol-polyoxyethylene ether and cyclobutanol; wherein the modified epoxy resin is prepared from the following raw materials in parts by weight: 1.8-3 parts of epoxy resin; 0.2-0.3part of cassava starch; 0.1-0.4 part of a flexible chain polymer; and a catalyst which is 0.005-0.01 part of sulfuric acid solution with the concentration of 0.8-1 mol/L. The anti-crack concrete hasexcellent anti-crack perform