Environment-friendly nanoscale bottom infiltrated layer material used for protecting concrete surface and preparation method of environment-friendly nanoscale bottom infiltrated layer material

Abstract

The invention relates to an environment-friendly nanoscale bottom infiltrated layer material used for protecting a concrete surface and a preparation method of the environment-friendly nanoscale bottom infiltrated layer material. A conventional infiltrated layer material used for protecting the concrete surface is extremely poor in permeability, can not guarantee the firm bonding with a concrete base, and is easy to fall off from the concrete surface under the action of external erosion conditions. The invention provides the nanoscale bottom infiltrated layer material which is prepared from an inorganic nano silicon dioxide solution, styrene-acrylic emulsion, pure acrylic emulsion, gamma-aminopropyl triethoxy silane, isobutyl triethoxy silane, sodium metaphosphate, tributyl phosphate and one of tetrabutyl orthosilicate, butyl acetate, sodium methyl silicate, acrylate and ethyl acetate. The environment-friendly nanoscale bottom infiltrated layer material can quickly infiltrate into concrete by certain depth and react with a concrete base material to seal pores inside the concrete, is good in bonding performance with a surface protective layer material, and can ensure the firm bonding between a concrete protective system and the concrete surface under the action of an outside environment and delay the occurrence of concrete diseases.

Description

technical field [0001] The invention belongs to the technical field of concrete protection, and in particular relates to an environment-friendly nano-level underseeding layer material for concrete surface protection and a preparation method thereof. Background technique [0002] Concrete is a widely used building material with excellent durability, but in the general atmospheric environment (carbon dioxide, water, oxygen, etc.) and winter deicing salt environment, due to the long-term erosion of carbon dioxide and chloride ions and its own performance defects (pore , micro-cracks, etc.), there will be concrete carbonation corrosion, chloride ion diffusion corrosion and other phenomena, and directly lead to the occurrence of internal steel corrosion, which will lead to a series of diseases such as concrete spalling, rust swelling cracks, etc., which seriously restrict the concrete structure. Use durability and use safety. As a protective measure, painting the protectiv...

AI Technical Summary

Problems solved by technology

[0003] The concrete protection system generally consists of a bottom seepage layer and a protective layer. The existing bottom seepage layer materials mainly have the following disadvantages: First, the permeability is poor. The domestic similar products can only penetrate 1~3mm into the concrete, and cannot penetrate into the concrete for a certain period of time. The second is that the bonding performance is poor, and the adhesion to the concrete surface is less than the specification requirement (the specification requirement ≥ 1MPa), and it cannot be firmly bonded to the concrete base surface; the third is that the anti-carbonization effect is poor, and the carbonation depth is generally greater than the specification requirement (the specification requirement ≤1mm), unable to cooperate with the surface protective layer to play a protective effect; Fourth, the anti-chloride ion penetration is poor, and the anti-chloride ion permeability is generally greater than the specification requirements (standard requirements -12 m 2 / s), unable to effectively prevent chloride ions from intruding into the concrete; fifth, poor environmental protection, most of the domestic similar products contain VOC, polluting the environment; sixth, the painting process is complicated, domestic similar products need to be coated on the concrete base before use Primer, increase process, increase cost

Images