▎ 摘　　要

NOVELTY - Preparing high-performance cement-based composite material containing reduced graphene oxide coated sand, comprises (1) washing fine aggregate with water to remove surface impurities, and soaking in sodium hydroxide solution; (2) dissolving tris(hydroxymethyl)aminomethane in deionized water, adding dopamine hydrochloride into solution, and stirring; (3) adding pre-treated fine aggregate to the surface modification solution, microwave heating, cooling, washing, and drying; (4) mixing graphene oxide powder with deionized water to obtain uniformly dispersed graphene oxide solution, and adding sodium hydroxide solution; (5) mixing reduced graphene oxide solution with surface-modified fine aggregate, and drying to obtain reduced graphene oxide-coated sand; and (6) adding water reducing agent, stirring, adding cement and reduced graphene oxide-coated sand to mixing pot, stirring, adding aqueous solution containing water reducing agent, and pouring mixture slurry into mold to obtain product. USE - The method is useful for preparing high-performance cement-based composite material containing reduced graphene oxide coated sand. ADVANTAGE - The composite material has high performance, high conductivity, intelligent characteristics convenient to realize large-scale popularization and use, and high engineering applicability.