▎ 摘　　要

NOVELTY - The strengthening method of recycled concrete involves dispersing 24-26 wt.% graphene oxide with a concentration of 0.8-1.2 wt.% in water and then mixing, adding 25-35 wt.% water-reducing agent to the mixture and then stirring, ultrasonically processing the mixture, adding recycled coarse aggregates with a particle size of 5-25 mm to the mixture and then stirring, adding fine sand and cement to the mixture and then stirring, adding 0.05-0.085 wt.% graphene oxide to the mixture and then molding, and curing. USE - The method is useful for strengthening recycled concrete (claimed). ADVANTAGE - The method is capable of strengthening recycled concrete with excellent strength, mechanical properties and durability in simple manner.