Anti-crack concrete material and preparation method thereof

The invention discloses an anti-crack concrete material and a preparation method thereof, and relates to the technical field of concrete. The anti-crack concrete material prepared by the invention is prepared from ordinary Portland cement, coarse aggregate, fine aggregate, fly ash, modified fibers, a water reducing agent and modified carbon nanotubes. Wherein the modified fiber is obtained by copolymerizing 2-(trifluoromethyl) propylene, vinyl chloride and acrylic acid, then reacting with 3-aminopropyltrimethoxysilane and finally utilizing a wet spinning process; the modified carbon nanotubes are obtained by reacting pretreated carbon nanotubes with maleic anhydride to obtain functionalized carbon nanotubes and polymerizing allyltrimethylammonium chloride on the surfaces of the functionalized carbon nanotubes; the prepared concrete has good mechanical strength and antibacterial performance, the structural strength is remarkably improved, the service life is remarkably prolonged, and the application potential