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A kind of concrete repair material and preparation method thereof

A technology for repairing materials and concrete, applied in the field of construction engineering, can solve the problems of poor concrete performance, low strength of polymer repair materials, restricting concrete repair projects, etc., to achieve the effects of improving strength, improving durability, and high repair strength

Active Publication Date: 2021-02-05
上海知碳电力工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to make cement concrete have higher fluidity, it is essentially to increase the amount of effective mixing water, but excess water is likely to form a large number of pores in the cement stone or the interface area of ​​the aggregate, and these pores are the main reason for the poor performance of concrete. reason
[0004] Therefore, the inorganic repair materials used in the prior art cannot effectively penetrate the cracks in concrete cracks, and the polymer repair materials have the problem of low strength, which restricts concrete repair projects

Method used

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  • A kind of concrete repair material and preparation method thereof
  • A kind of concrete repair material and preparation method thereof
  • A kind of concrete repair material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of epoxy-polyurethane composites:

[0030] Step 1a, preparation of fluorine-modified acrylic resin: in parts by weight, mix 15 parts of xylene and 18 parts of butyl acetate as a mixed solvent, and heat up to 90°C; then mix 14 parts of styrene, methyl methacrylate 10 parts, 24 parts of butyl acrylate, 8 parts of acrylic acid, 5 parts of dodecafluoroheptyl methacrylate, 0.5 parts of dibenzoyl peroxide, 5 parts of xylene, and 12 parts of butyl acetate are mixed uniformly as a monomer mixture Add the monomer mixture dropwise to the mixed solvent for reaction; after the dropwise addition, continue the heat preservation reaction for 4 hours, cool down and filter the material, and obtain a fluorine-modified acrylic resin;

[0031] Step 1b, preparation of modified epoxy resin: in parts by weight, 50 parts of E44 epoxy resin was heated up to 70°C, and 20 parts of fluorine-modified acrylic resin and 1 part of catalyst triethylamine were added dropwise. , the temperat...

Embodiment 2

[0043] Preparation of epoxy-polyurethane composites:

[0044] Step 1a, preparation of fluorine-modified acrylic resin: in parts by weight, mix 15 parts of xylene and 18 parts of butyl acetate as a mixed solvent, and heat up to 90°C; then mix 12 parts of styrene, methyl methacrylate Mix 5 parts, 20 parts of butyl acrylate, 6 parts of acrylic acid, 3 parts of dodecafluoroheptyl methacrylate, 0.5 parts of dibenzoyl peroxide, 10 parts of xylene, and 15 parts of butyl acetate, as a monomer mixture Add the monomer mixture dropwise to the mixed solvent for reaction; after the dropwise addition, continue the heat preservation reaction for 4 hours, cool down and filter the material, and obtain a fluorine-modified acrylic resin;

[0045] Step 1b, preparation of modified epoxy resin: in parts by weight, 50 parts of E44 epoxy resin was heated up to 70°C, and 20 parts of fluorine-modified acrylic resin and 1 part of catalyst triethylamine were added dropwise. , the temperature is raised t...

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Abstract

The invention discloses a concrete repair material, which is composed of the following raw materials in percentage by weight: 30-35 parts of sulphoaluminate cement, 8-10 parts of quartz sand, 6-8 parts of river sand, epoxy-polyurethane composite material 20-25 parts, 2-4 parts of exothermic material, 2-3 parts of heat-changing material, 2-3 parts of water reducing agent, 0.5-0.6 parts of anionic surfactant, 1-2 parts of retarder. After the initial cracks are added, the thermally variable material will leave enough space to allow other polymer materials and base materials to flow into the gaps after being heated and shrink, so that more base materials and polymers can be accommodated in the gaps, and when the heat dissipates Afterwards, the thermally variable material expands, allowing the base material and polymer to fully fill the crack and achieve high repair strength.

Description

technical field [0001] The invention relates to a repairing material, in particular to a concrete repairing material and a preparation method thereof, belonging to the technical field of construction engineering. Background technique [0002] In addition to good construction performance and excellent durability, cement pavement also has strong pavement structure, strong diffusion load capacity, large friction resistance, good anti-skid performance, good wear resistance, good temperature and water stability, and long service life. , Low maintenance costs and other advantages. However, there are also some fatal defects in the cement concrete pavement. For example, when there are some defects in the use conditions, environmental conditions, roadbed construction quality and materials, it is easy to cause local damage in different degrees, such as cracking, broken boards, and local depressions. Or misplaced, cracked and loosened, even partially broken into small pieces, peeled a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/06
CPCC04B28/06C04B2111/0075C04B2201/50C04B14/06C04B24/282C04B24/281C04B22/064C04B24/28C04B24/20C04B22/08C04B22/066
Inventor 张洪波
Owner 上海知碳电力工程有限公司
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