Concrete repairing agent and preparation method thereof

Abstract

The invention provides a concrete repairing agent and a preparation method thereof. The concrete repairing agent is composed of a component A and a component B in a mass ratio of 1: 1; wherein the component A comprises the following components in parts by mass: 66 parts of polymethylene polyphenyl isocyanate, 34 parts of a surfactant and 60 parts of a defoaming agent; the component B is prepared from 33 parts of N, N, N, N,-tetra (2-hydroxypropyl) ethylenediamine, 7 parts of a polyether polyol, 4 parts of fatty alcohol-polyoxyethylene ether, 55 parts of a surfactant and a small amount of a pigment. The concrete repairing agent disclosed by the invention is different from the traditional bisphenol A resin; in preparation method, the polymethylene polyphenyl isocyanate as a main agent; the technical characteristics of low normal-temperature viscosity, small low-temperature viscosity change, good cured body flexibility, strong adhesion, good permeability and low cost are achieved; and thesurfactant component is added into the components, so that the surface tension of crack pouring adhesive can be remarkably reduced, penetration of adhesive solution is quick and uniform, rapid penetration can be realized in 10 minutes, and good wettability is achieved.

Description

technical field [0001] The invention belongs to the technical field of concrete repair, and in particular relates to a concrete repair agent and a preparation method thereof. Background technique [0002] At present, repairing materials for concrete defects include but are not limited to epoxy resin repairing agents, polyurethane repairing agents, cement-based repairing mortars and other repairing materials. Most of these repairing materials have long curing time, cumbersome operation and poor permeability. [0003] Most of the epoxy resin repair materials have high viscosity and cannot achieve self-permeation, and need tools and equipment to assist operation, and the weather resistance of the material is poor; polyurethane repair materials have poor permeability, low strength, poor weather resistance and fast aging speed; cement-based repair materials Repairing materials are only suitable for surface coating and maintenance, and the requirements for maintenance are strict. ...

AI Technical Summary

Problems solved by technology

[0002] At present, in concrete defect repair materials, including but not limited to epoxy resin repair agent, polyurethane repair agent, cement-based repair mortar and other repair materials, most of these repair materials have long curing time, cumbersome operation and poor permeability

[0003] Most of the epoxy resin repair materials have high viscosity and cannot achieve self-permeation, and need tools and equipment to assist operation, and the weather resistance of the material is poor; polyurethane repair materials have poor permeability, low strength, poor weather resistance and fast aging speed; cement-based repair materials Repairing materials, only suitable for surface coating repair, strict requirements for repair conditions, easy to fall off or crack if the coating is too thin

[0004] In the Chinese patent modified graphene oxide concrete crack repair material and its preparation method with the patent number CN201810928611, the inventor uses cement-based materials, which are only suitable for surface repair of concrete, and cannot fully repair deep cracks. Repair and reinforcement; the patent number is CN201810798120, a Chinese patent for a concrete crack repair material based on phosphorus and magnesium materials and its construction technology. The inventor also used cement-based materials to repair concrete cracks, and deep cracks still cannot be completely repaired. , can only be used for repairing work on concrete surfaces and cracks; the patent number is CN201810203639, a low-viscosity concrete crack repair pouring glue and its preparation method, the inventor used epoxy resin as the cementitious material, and adopted The active diluent greatly reduces the viscosity of the epoxy resin, reduces the volatilization of the diluent, and reduces the volatilization of toxic substances, but the viscosity of this material still needs to be infused with tools and equipment to exert its effect, as shown in the patent Mentioned in (the physical drill core sampling picture after the building concrete cracks are repaired by low-pressure grouting glue, the core sample sampling depth is 200mm) which is not conducive to on-site operation, the low-pressure grouting operation is cumbersome, and the curing time is long

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