Single-component interfacial agent and preparation method thereof

Abstract

The invention discloses a single-component interfacial agent and a preparation method thereof. The single-component interfacial agent is prepared from the following effective components in parts by weight: 15-30 parts of resin, 1-5 parts of silane emulsion, 2-10 parts of chelating agent, 20-40 parts of cement, 5-10 parts of mineral admixture and 30-50 parts of aggregate. The preparation method ofthe single-component interfacial agent comprises the following steps of: uniformly mixing powder of the effective components under a normal temperature according to a certain proportion, and obtainingthe single-component interfacial agent. The single-component interfacial agent and the preparation method disclosed by the invention have the beneficial effects that the reaction environment in the slurry of the single-component interfacial agent is adjusted by the chelating agent, by generation of more and dispersed small crystal and needle-shaped morphology, excellent interfacial bonding strength is formed.

Description

technical field [0001] The invention relates to a one-component interface agent and a preparation method thereof, belonging to the technical field of building construction materials. Background technique [0002] In the field of construction, the phenomenon of aging and damage of buildings is common. Due to economic and social factors and other reasons, it is inconvenient to dismantle and rebuild. Therefore, for problems such as concrete aging, cracking, and erosion, reinforcement and reinforcement will be used to deal with them. Therefore, in concrete construction or maintenance projects, the problem of bonding old and new concrete interfaces is often encountered. Generally speaking, when no adhesive is used, the bonding strength of the old and new concrete interface is low, and it is easy to form a structural weak surface. However, due to the difference in materials and ages of the new and old concrete, under certain circumstances, its drying shrinkage deformation and tem...

AI Technical Summary

Problems solved by technology

Generally speaking, when no adhesive is used, the bonding strength of the old and new concrete interface is low, and it is easy to form a structural weak surface. However, due to the difference in materials and ages of the old and new concrete, under certain circumstances, its drying shrinkage deformation and temperature deformation are difficult. Coordinated, tensile stress and shear stress are generated at the joint surface, which cracks the already weak new and old concrete joint surface, thus leaving a safety hazard for the structure

[0003] In the prior art, the expansion agent is added to the interface agent, the purpose of which is to offset the drying shrinkage during the cement hydration and hardening process through the expansion effect, so that the structure of the transition layer is relatively dense, but the hydration product of the expansion paste - large crystals ettringite, which forms a strong orientation layer and negatively affects the bond strength of the interface

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