Concrete repairing material and preparation method thereof

A technology for repairing materials and concrete, applied in the field of construction engineering, can solve problems such as poor concrete performance, low strength of polymer repair materials, and inability to effectively penetrate cracks, and achieve the effects of improving durability, high repair strength, and strength.

Active Publication Date: 2019-03-26
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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  • Concrete repairing material and preparation method thereof
  • Concrete repairing material and preparation method thereof
  • Concrete repairing 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 repairing material which comprises the following raw materials in parts by weight: 30-35 parts of sulfate aluminum cement, 8-10 parts of quartz sand, 6-8 parts of river sand, 20-25 parts of epoxy-polyurethane composite material, 2-4 parts of heat releasing material, 2-3 parts of thermal changing material, 2-3 parts of water reducer, 0.5-0.6 part of anionic surfactant and 1-2 parts of retarder. After the concrete repairing material is added into a crack in initial stage, the thermal changing material shrinks after being heated, a sufficient space is leaved forother polymer materials and base stocks to flow into a gap, and more base stocks and polymers are accommodated in the gap. After heat dissipation, the thermal changing material swells, so that the crack is filled with base stocks and polymers and higher repairing strength can be achieved.

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 solid 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, etc., it is easy to cause different degrees of local damage, such as cracking, broken boards, and local depressions. Or misplaced, cracked and loosened, even partially broken into small pieces, pee...

Claims

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Application Information

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Patent Type & Authority Applications(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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