▎ 摘　　要

NOVELTY - Composite modified polyurethane concrete comprises 100 pts.wt. mineral aggregate, 4-8pts.wt. polyurethane, 0.002-0.008 pts.wt., 0.3-1.8pts.wt. rubber powder, 0.014-0.036 pts.wt. improver, 0.10- 0.30 pts.wt.stabilizer and 0.002- 0.012pts.wt. coupling agent. USE - Composite modified polyurethane concrete. ADVANTAGE - The composite modified polyurethane concrete has high temperature stability, low temperature crack resistance and anti-fatigue performance, based on the synergistic effect of the polyurethane, the graphene oxide and the rubber powder, the polyurethane accelerates the curing reaction with the mixture under the high-temperature condition, has better binding force with the aggregate, and simultaneously strengthens the wrapping force on the aggregate, and the mixture has very good load deformation resistance due to the addition of the graphene oxide and the rubber powder; viscoelastic property is excellent at low temperature, and the anti-cracking property of the mixture is better due to the addition of the graphene oxide and the rubber powder. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation method of composite modified polyurethane concrete, involves(1)uniformly mixing graphene oxide, improver and coupling agent, (2)adding stabilizer, graphene oxide modifier and rubber powder modifier into polyurethane under stirring condition of 20-30 ℃, and uniformly stirring; shearing polyurethane by high-speed shearing machine to obtain composite modified polyurethane;(3)mixing and stirring the mineral aggregate and composite modified polyurethane uniformly to obtain polyurethane-modified polyurethane composite material.