Preparation method and optimal proportioning application of polyurea modified epoxy resin mortar

The invention relates to a preparation method of polyurea modified epoxy resin mortar, which is used for preparing the polyurea modified epoxy resin mortar with high toughness, high strength, long initial setting time, low shrinkage, excellent cohesiveness and low cost on the basis of components such as epoxy resin emulsion and polyurea coating according to a constrained proportional relation among the components. The cement-based tunnel lining repairing material is formed; further designing the optimal proportion application of the component proportion, taking the condition that the target setting time meets the target bonding strength as the constraint, and taking the lowest preparation cost as the target, constructing a function, and optimizing the ring-ash ratio and the doping ratio of the polyurea coating to the cement; the target setting time of the polyurea modified epoxy resin mortar meets the target bonding strength, the actual application efficiency of the cement-based tunnel lining repairing materi