Building reinforced high-ductility concrete as well as preparation method and construction method thereof

The invention discloses building reinforced high-ductility concrete as well as a preparation method and a construction method thereof. The building reinforced high-ductility concrete is prepared fromthe following raw materials in parts by mass: 1 part of a cementing material, 0.25 to 0.45 part of quartz sand, 0.01 to 0.02 part of synthetic fibers, 0.001 to 0.02 part of xanthan gum, 0.0003 to 0.0008 part of a water reducing agent and 0.25 to 0.35 part of water. The building reinforced high-ductility concrete has excellent toughness and has a good inhibition effect on crack development, xanthangum is doped to improve the cohesive force of the high-ductility concrete, and the surface cohesiveness of the high-ductility concrete and an existing component is improved, so that a surface layer of the building reinforced high-ductility concrete and the component form a whole, and the existing structure has the performance of ductile failure resistance. When a pressing and plastering process is adopted for reinforcing