Carbon fiber impregnating adhesive and preparation method thereof

Abstract

The invention belongs to the technical field of preparation and application of building materials and in particular discloses a carbon fiber impregnating adhesive. The carbon fiber impregnating adhesive is prepared from a component A and a component B, wherein the component A and the component B are mixed according to the mixing ratio of 4 to 1 based on weight; the component A is prepared from thefollowing components in parts by weight: 90 to 110 parts of epoxy resin, 5 to 25 parts of diluting agent, 10 to 30 parts of toughening agent, 0.5 to 1.5 parts of de-foaming agent, 2 to 6 parts of gaseous silicon and 6 to 26 parts of activated calcium powder; the component B is prepared from the following components in parts by weight: 25 to 45 parts of curing agent, 1 to 5 parts of accelerant, 0.5 to 1.5 parts of coupling agent and 0.125 to 0.75 part of color paste. The carbon fiber impregnating adhesive disclosed by the invention has the beneficial effects that less activated calcium powderis added into the component A, so that the viscosity and thixotropy of the carbon fiber impregnating adhesive are increased; the adhesion performance is enhanced and the mechanical property of an adhesive body is not changed; the carbon fiber impregnating adhesive has high strength and excellent wetting property and permeability; a cured adhesive layer has good physical and mechanical properties,is tough and elastic and has excellent anti-ageing performance, acid and alkali resistance and water resistance; the carbon fiber impregnating adhesive does not contain a volatile solvent and is suitable for reinforcing and repairing a concrete structure by various fiber sheet materials.

Description

technical field [0001] The invention belongs to the technical field of preparation and application of building materials, and in particular relates to a carbon fiber impregnated glue and a preparation method thereof. Background technique [0002] Carbon fiber impregnated glue is mainly used in the structural bonding construction of carbon fiber sheets and concrete, steel components, and masonry components, or the bonding construction of carbon fiber sheets in reinforced concrete tension members. [0003] During the construction process, the concrete surface of the reinforced member is required to be dry and flat, so that the pasted carbon fiber sheet will not fall off. However, due to various reasons in the actual construction process, the concrete surface is often wet and uneven, which will lead to the paste. The sheet falls down before the colloid is fully cured, resulting in material waste and increased construction volume. How to improve the adhesion of carbon fiber imp...

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Problems solved by technology

[0008] The carbon fiber impregnated adhesive of this formula has low viscosity and better wettability. The disadvantage is that the viscosity is low and the bonding performance is not good. When the surface of the reinforcement member is not smooth enough, it is easy to cause the carbon fiber sheet to fall off under wet conditions.

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