▎ 摘　　要

NOVELTY - Preparing impermeable concrete comprises (i) taking hydrophobic graphene oxide and deionized water, ultrasonically dispersing for 5-10 hours, adding cobalt chloride hexahydrate, hexahydrate nickel chloride, stirring for 20-30 hours, adding sodium tartrate, sodium hydroxide and sodium hypophosphite, stirring for 1-1.5 hours, where the adding interval time is 20-30 minutes, raising to 140-145℃, keeping temperature and reacting for 3-4 hours, collecting product, and obtaining magnetic graphene; and (ii) taking gravel, sand, glass fiber and polyformaldehyde fiber, mixing and stirring uniformly, adding cement, mineral powder, 2/3 amount of fly ash and steel slag powder, stirring uniformly, adding water reducing agent, air-entraining agent, hydrophobic graphene oxide, magnetic titanium dioxide and 1/2 amount of water, stirring, adding magnetic graphene, 1/3 amount of fly ash and 1/2 amount of water, and stirring uniformly to obtain the finished product concrete. USE - The method is useful for preparing impermeable concrete used for reservoir dam, preferably river dam, dam, reservoir, river, and water blocking dike and other engineering construction. ADVANTAGE - The method improves the impermeability of the concrete, realizes the whole strength and mechanical property of the prepared anti-seepage concrete meets the existing standard, improves concrete inner pore structure, reduces the porosity, realizes the concrete has excellent impermeability and high practicability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for impermeable concrete prepared by above mentioned method.