▎ 摘　　要

NOVELTY - Three-dimensional (3D) printing graphene oxide reinforced cement-based material comprises cement, modified quartz sand, fly ash, steel slag powder, white carbon black, water reducing agent, retarder and water. The graphene oxide is prepared by adding graphite, concentrated sulfuric acid, concentrated nitric acid, potassium thiosulfate and phosphorus pentoxide into the reactor at room temperature, controlling the reactor temperature at 60-80degrees Celsius?, preferably 70degrees Celsius and reacting for 4-6 hours, preferably 5 hours, filtering, washing with deionized water and drying to obtain a pre-oxidized graphite; adding the pre-oxygenated graphite and concentrated sulfuric acid to the reactor, starting the stirring, slowly adding potassium permanganate to reactor, and reacting for 2-4 hours and preferably 3 hours; and slowly adding hydrogen peroxide to reactor for 1-3 hours, filtering, washing by deionized water, and drying. USE - The graphene oxide reinforced cement-based material is used for 3D printing . Uses include but are not limited to industrial design, construction, automobile, aerospace, dental and education fields. ADVANTAGE - The 3D printing graphene oxide reinforced cement-based material has good printing performance and comprehensive performance. DETAILED DESCRIPTION - The cement-based material comprises cement, modified quartz sand, fly ash, steel slag powder, white carbon black, water reducing agent, retarder and water. The modified quartz sand is prepared by mixing quartz sand, graphene oxide, methacryloxyundecylmethyldimethoxysilane, and deionized water; adding ethanol into the reactor, starting stirring, controlling the reactor temperature at 50-60degrees Celsius, preferably 55degrees Celsius, reacting for 8-12 hours, discharging, and drying after 10 hours. The graphene oxide is prepared by (i) adding graphite, concentrated sulfuric acid and concentrated nitric acid into the reactor at room temperature, stirring for 20-25 hours, preferably 22 hours, filtering, using deionized water to wash, drying, placing the dried graphite in 800-1000degrees Celsius environment for 8-12 seconds to obtain heat expansion graphite; (ii) adding the heat expansion graphite, concentrated sulfuric acid, potassium thiosulfate and phosphorus pentoxide into the reactor, controlling the reactor temperature at 60-80degrees Celsius, preferably 70degrees Celsius, reacting for 4-6 hours, preferably 5 hours, filtering, washing with deionized water, and drying to obtain pre-oxidized graphite; and (iii) at room temperature, adding the pre-oxidized graphite, concentrated sulfuric acid into the reactor, starting stirring, slowly adding potassium permanganate into the reactor, reacting for 2-4 hours, preferably 3 hours, slowly adding hydrogen peroxide in the reactor, reacting for 1-3 hours, filtering, washing by deionized water; and drying. An INDEPENDENT CLAIM is included for preparation of the cement-based material comprising uniformly mixing the cement, modified quartz sand, fly ash, steel slag powder, white carbon black, water reducing agent, retarder and water, adding into a 3D printer, printing, and curing.