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Preparation method and application of an environmentally friendly, low-viscosity, high-strength epoxy-based grouting material

A grouting material and low-viscosity technology, applied in the field of environment-friendly, low-viscosity, and high-strength epoxy-based grouting materials, can solve the problems of grouting limitation of the slurry, large shrinkage of the cured product, and decreased physical properties, and achieve excellent mechanical properties of the cured product. The effect of stable curing volume and simple slurry ratio

Active Publication Date: 2019-06-04
POWERCHINA XIBEI ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of slurry is simple to prepare and has a low viscosity, but a large amount of solvents that do not participate in the reaction are added, resulting in a decrease in physical properties and large shrinkage of the cured product, so it is rarely used at present; (2) Epoxy resin grouting of furfural-acetone dilution system The material is currently widely used in our country. It is based on the fact that furfural-acetone can be cured in an alkaline environment to form a furan resin. It has the excellent properties of epoxy resin and furan resin, high mechanical strength, firm bond with rock and concrete, water resistance, acid resistance, alkali resistance, salt corrosion resistance, and excellent aging resistance. With the development of the chemical industry, the types of epoxy curing agents are increasing. The epoxy resin grouting materials currently being studied have better physical properties and high permeability. Good mechanical properties and bonding viscosity can also be obtained under suitable process conditions, but the disadvantage of this type of grouting material is that it uses highly toxic furfural, the slurry is not environmentally friendly, and the solvent volatilizes, which often leads to air pollution on the construction site. Harsh, large amount of heat released during slurry curing, prone to problems such as "explosion"
Replacing the non-reactive diluent with the active diluent, the slurry material has good performance due to the overcoming of the volatilization of the solvent. The viscosity of the existing active diluent itself is generally higher than that of the non-reactive diluent, and the dilution effect is not ideal, so the viscosity of the slurry The pourability is limited, and too much addition will affect the crosslinking density of the cured product

Method used

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  • Preparation method and application of an environmentally friendly, low-viscosity, high-strength epoxy-based grouting material
  • Preparation method and application of an environmentally friendly, low-viscosity, high-strength epoxy-based grouting material

Examples

Experimental program
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Effect test

Embodiment 1

[0029] The invention provides a method for preparing an environment-friendly high-strength epoxy-based chemical grouting material, comprising the following steps:

[0030] 1) Mix 50-80 parts of epoxy resin and 20-50 parts of cross-linking diluent to obtain liquid A;

[0031] 2) Mix 5-10 parts of curing agent and 1-5 parts of accelerator to obtain liquid B;

[0032] 3) 1 to 10 parts of initiator constitute component C alone;

[0033] 4) When using, mix and stir liquid A and liquid B evenly, then add component C, and stir well to obtain an environmentally friendly high-strength epoxy-based chemical grouting material.

Embodiment 2

[0035] On the basis of embodiment 1, the epoxy resin described in step one is bisphenol A type epoxy resin, and described bisphenol A type epoxy resin is E-35 type epoxy resin, E-44 type epoxy resin One or at least two of resin or E-51 type epoxy resin.

[0036] The cross-linking diluent in step one is one or at least two of methyl methacrylate, butyl acrylate or hydroxybutyl acrylate.

[0037] The curing agent described in the second step is one or at least two of diethylenetriamine, triethylenetetramine or tetraethylenepentamine.

[0038] The accelerator described in the second step is one of N,N dimethylaniline, ethylimidazole or dimethylimidazole.

[0039] The initiator described in step 3 is prepared by the following steps: mix the peroxide and the inert solvent according to the mass ratio (50-80): (20-50), after standing for 24 hours, obtain the initiator through sufficient dehydration .

[0040] Described peroxide is one or at least two in organic peroxide; Described...

Embodiment 3

[0043] An environmentally friendly, low-viscosity, high-strength epoxy-based grouting material is prepared by the following method:

[0044] 1) Preparation of initiator (component C): 65 parts by mass of benzoyl peroxide and 50 parts by mass of dibutyl phthalate were evenly mixed, and after standing for 24 hours, fully dehydrated to obtain the initiator.

[0045] 2) Preparation of environmentally friendly low-viscosity high-strength epoxy grouting material:

[0046] Liquid A: 75 parts by mass of E-51 type epoxy resin and 25 parts by mass of methyl methacrylate are uniformly mixed to obtain;

[0047] Liquid B: obtained by uniformly mixing 10 parts by mass of diethylenetriamine and 4 parts by mass of N,N dimethylaniline;

[0048] When in use, mix liquid A, liquid B and 8 parts by mass of initiator (component C) uniformly to obtain a non-toxic, low-viscosity, high-strength epoxy grouting material.

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Abstract

The invention discloses a preparation method of an environment-friendly, low-viscosity and high-strength epoxy grouting material. The preparation method includes the following steps that 1, 50-80 parts of epoxy resin and 20-50 parts of crosslinking diluent are mixed to obtain liquid A; 2, 5-10 parts of curing agent and 1-5 parts of accelerant are mixed to obtain liquid B; 3, 1-10 parts of initiator independently forms a component C; 4, during use, firstly, the liquid A and the liquid B are mixed and stirred to be uniform, the component C is added, and the environment-friendly, low-viscosity and high-strength epoxy grouting material is obtained after the materials are stirred to be uniform. The components of the grouting material are free of toxins and friendly to the human body and the environment; the initial slurry is low in viscosity and excellent in grouting performance, has water drainage performance, and can be cured in water; the shrinkage rate of the slurry is low during gelatinization curing, the curing volume is stable, and the mechanical performance of cured products is excellent; the slurry matching is simple and easy to grasp, and the raw materials are easy to purchase; the grouting material can be applied to strengthening reinforcement of board or beam or column structure concrete cracks and seepage-proofing reinforcement of hydraulic concrete cracks.

Description

Technical field: [0001] The invention relates to an epoxy resin-based environmentally friendly low-viscosity high-strength epoxy-based grouting material, in particular to an environmentally friendly low-viscosity low-viscosity concrete crack reinforcement for structural concrete such as plates, beams, and columns, and hydraulic concrete cracks for seepage prevention and reinforcement. A preparation method of a high-strength epoxy-based grouting material. Background technique: [0002] Epoxy resin grouting material is a multi-component solution grouting material obtained by reducing the viscosity of viscous epoxy resin with diluent, supplemented with curing agent, toughening agent and surfactant and other additives. In the family of chemical grouting materials, epoxy resin grouting materials have become the leading chemical grouting materials in foundation reinforcement and structural repair projects due to their good base adaptability and excellent mechanical strength. [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L63/02C08L63/00C08G59/50C08G59/56
CPCC08G59/5006C08G59/56C08L63/00
Inventor 韩练练胡炜毕亚丽张勇王奇峰孙宇飞
Owner POWERCHINA XIBEI ENG
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