▎ 摘　　要

NOVELTY - Preparing bi-component pouring sealant involves preparing pouring sealant by uniformly mixing a component A and a component B in a mass ratio of 1:0.5-2. The component A is prepared by heating 100 pts. wt. matrix asphalt to 110-130degrees Celsius. The mixture is heated at 150-180degrees Celsius, poured 0.06-1.0 pts. wt. graphene oxide powder into 30-60 pts. wt. waste vegetable oil, uniformly stirring, pouring into the composite modified asphalt, continuously sheared for 30-60 minutes, and preserved heat at 80-120degrees Celsius. The 0.15-5.5 pts. wt. solubilizer, 3-22 pts. wt. polyurethane prepolymer and 0.15-5.5 pts. wt. diluent are added into the modified asphalt, and sheared and stirred for 20-60 minutes. The 0.1-3 pts. wt. fiber is added into the composite modified asphalt, and uniformly stirred. USE - Method for preparing bi-component pouring sealant for repairing cracks of asphalt concrete pavement. ADVANTAGE - The huge specific surface area of nanomaterials and the synergy of multiscale systems ensure that the modified asphalt network structure has high strength, good stability and excellent oxidation resistance. The method enables to properly adjust the composition and proportion of components A and B to obtain pouring sealant with different viscosities and curing times to meet the penetration requirements of crack repairs with different widths and depths. DETAILED DESCRIPTION - Preparing bi-component pouring sealant involves preparing pouring sealant by uniformly mixing a component A and a component B in a mass ratio of 1:0.5-2. The component A is prepared by heating 100 pts. wt. matrix asphalt to 110-130degrees Celsius. The mixture is heated at 150-180degrees Celsius, poured 0.06-1.0 pts. wt. graphene oxide powder into 30-60 pts. wt. waste vegetable oil, uniformly stirring, pouring into the composite modified asphalt, continuously sheared for 30-60 minutes, and preserved heat at 80-120degrees Celsius. The 0.15-5.5 pts. wt. solubilizer, 3-22 pts. wt. polyurethane prepolymer and 0.15-5.5 pts. wt. diluent are added into the modified asphalt, and sheared and stirred for 20-60 minutes. The 0.1-3 pts. wt. fiber is added into the composite modified asphalt, and uniformly stirred, heated 30-55 pts. wt. epoxy resin to 90-100 degrees Celsius, and then added 2-10 pts. wt. lignin, and stirred for 1-2 hours. The 10-40 pts. wt. diluent is added, uniformly stirred, poured into the composite modified asphalt and uniformly stirred. The 2-10 pts. wt. plasticizer is added into the product, and uniformly stirred. The component B is prepared by mixing 1.8-38.5 pts. wt. epoxy resin curing agent, 0-0.93 pts. wt. accelerator and 0.3-5.5 pts. wt. polyurethane chain extender and stirring uniformly.