A kind of low-viscosity concrete crack repair pouring glue and preparation method thereof

Abstract

The invention discloses a low-viscosity perfusion adhesive for repairing a concrete crack and a preparation method thereof. The low-viscosity perfusion adhesive for repairing the concrete crack is prepared from a component A and a component B in a mass ratio of 100 to 3, wherein, in parts by mass, the component A is prepared from 100 parts of cardanol epoxy resin, 1.2 to 9.7 parts of ester thinner, 0.5 to 1 part of surfactant and 1 to 1.5 parts of antifoaming agent; the component B is prepared from 25 to 37 parts of compound amine curing agent, 1 to 3 parts of coupling agent and 1 to 2 parts of accelerant. The cardanol epoxy resin of the low-viscosity perfusion adhesive is low in room-temperature viscosity; as the cardanol has a low-temperature-resistant characteristic, the cardanol epoxyresin is slightly influenced in viscosity by a temperature change, and is particularly suitable to use in a low-temperature environment; the excellent flexible performance is provided for the epoxy resin by the longer carbon chain of the cardanol; when a seam injection adhesive is confected, a flexibilizer can be allowed not to be extra added any more; in addition, a synthetic raw material cashewnut shell liquid of the low-viscosity perfusion adhesive is a potential renewable resource, and the production cost is enabled to tend to cheapness.

Description

technical field [0001] The invention belongs to the technical field of materials, and in particular relates to a low-viscosity concrete crack repair pouring glue and a preparation method thereof. Background technique [0002] Epoxy joint injection glue is a multi-component solution type pouring material mixed with epoxy resin as the main agent, supplemented with diluent, toughener, surfactant and curing agent. The cured epoxy joint glue has good bonding properties, excellent base adaptability and good mechanical strength, and is widely used in concrete structure crack filling repair and reinforcement projects. [0003] Under the action of external pressure, epoxy joint glue can penetrate and fill into the cracks of the structure, and its own viscosity will directly affect the filling depth and filling degree of the glue in the process of crack repair, and then affect the effect of repair . Usually, the effect of reducing the viscosity of the glue is achieved by adding a di...

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Problems solved by technology

However, the disadvantage of this type of glue is that it uses highly toxic furfural, the slurry is not environmentally friendly, and the environment is polluted by volatilization of the solvent, the heat of curing is large, and problems such as "explosion" are prone to occur; patents CN201110207935.3, CN201010219982. 5. CN201310106305.6 uses a low molecular weight glycidyl ether diluent, which has a very low viscosity and contains epoxy groups that can participate in the reaction of the curing agent. It is usually called a reactive diluent

In addition, although the traditional polyamine curing agent has low initial viscosity, it has the disadvantages of short curing time and large exothermic temperature rise. Before the glue penetrates into the depth of the crack, it will gradually cross-link and consolidate and lose its penetration ability. , often leads to incomplete filling

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