Underwater epoxy concrete, mortar additive and preparation method thereof

Abstract

The invention relates to an underwater epoxy concrete, mortar additive and a preparation method thereof. The additive comprises component A and component B which comprise the ingredients by weight percent: 40-45% of epoxy resin E-51, 16.5-21% of epoxy resin E-44, 9-13% of reactive diluent, 6.0-7.5% of toughening agent, 1-2% of coupling agent, 20-24% of curing agent T-31; wherein the curing agent T-31 belongs to the component B, and the rest ingredients are component A. The method comprises: the epoxy resin E-51 and the epoxy resin E-44 are heated to be about 40 DEG C and then evenly stirred; Kocsis toughening agent QS-BE is added; after that, the diluent and the coupling agent are added, and the mixture is evenly dispersed by a high-speed disperser, so that the component A can be obtained; the component A and the curing agent T-31 are mixed together and evenly stirred, so that the underwater epoxy concrete, mortar additive can be obtained. The additive is simple in preparation technique, and the prepared mixture has no phenomena of segregation and dispersion, has the functions of self-leveling and self-compaction and needs no concrete vibrating when being cast in the water; after being cured, the additive has good splicing performance with the original concrete; the prepared mixture has strong acid and alkali corrosion resistance after being cured in the water; therefore, the invention can be applied to underwater casting of concrete structures such as bridge piers, dams and bottom plates of reservoir power stations and the like as well as underwater thin-layer repair.

Description

Technical field: [0001] The invention relates to an epoxy concrete, a mortar additive and a preparation method thereof, in particular to an epoxy concrete which can be directly poured underwater, a mortar additive and a preparation method thereof. It can be applied to underwater pouring of concrete structures and underwater thin-layer repair. Background technique: [0002] Concrete structures such as bridge piers, dams and floor plates of reservoir power stations are scoured by high-speed water for a long time, which will cause serious damage and pose safety hazards, and need to be reinforced in time. However, it is impossible to repair these structures in a dry state by traditional methods, and construction must be carried out underwater. During the pouring of ordinary concrete mixture in water, the cement in the mixture will be washed by water and partially lost, which will significantly reduce the strength of the concrete cured product. At present, Chinese patent CN1073...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art, aiming at the fact that the current concrete mixture is easy to be washed and lost during the underwater construction process, the bond strength is low, the acid and alkali corrosion resistance is poor, and it is difficult to repair the damaged concrete layer, etc. Problem, provide a kind of additive that substitutes water preparation concrete, mortar and preparation method thereof