▎ 摘　　要

NOVELTY - An oxidized graphene modified cement-based composite material comprises graphene oxide, polyvinyl alcohol fiber, 60-100 parts mass cement, 40-100 parts mass fly ash, 18-50 parts mass water, 140-210 parts mass quartz sand, polycarboxylate superplasticizer, reducing agent, 10-30 parts mass polymer and defoamer. The total mass of graphene oxide, polycarboxylate superplasticizer, polyvinyl alcohol fiber, reducing agent, defoamer, cement and fly ash is 0.02-0.1%, 0.2-0.6%, 1-5%, 0.5-2% and 0.3-2%. USE - Oxidized graphene modified cement-based composite material used for repair and reinforcement of building structure. ADVANTAGE - The composite material has high compressive strength and flexural strength, low shrinkage, high toughness, and high ductility.