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Quick healant with low viscosity and high performance for concrete structure

A high-performance concrete and low-viscosity technology, which is applied in the field of chemical building materials, can solve the problems of long curing time, large shrinkage deformation, and high requirements for preparation conditions, and achieves simple preparation and construction operations, low loss rate of mechanical strength, and economical reduction. loss effect

Inactive Publication Date: 2012-09-05
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation method is divided into three steps, the method is cumbersome, and the preparation conditions are relatively high.
The construction method is to pour the concrete cracks with water emulsion first, and after 0.1 to 36.0 hours, mix the modified vinyl ester resin grouting material evenly and then pour the concrete cracks. It takes 2 to 4 days, and the construction operation is complicated.
[0006] To sum up, the existing repair materials either have the disadvantages of low bonding strength with old concrete, long curing time, and are only suitable for repairing large areas of damage, or have shortcomings such as large shrinkage deformation, high viscosity, and high brittleness. Meet the repair requirements of micro-cracks in concrete structures

Method used

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  • Quick healant with low viscosity and high performance for concrete structure

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] (1) low-viscosity high-performance concrete structure rapid repair agent comprises following components by weight parts:

[0031] Component 1: methyl methacrylate, 100 parts;

[0032] Component 2: butyl methacrylate, 28 parts;

[0033] Component 3: benzoyl peroxide, 3.0 parts;

[0034] Component 4: epoxy resin, 16 parts;

[0035] Component 5: KH-570, 10 parts;

[0036] Component 6: methacrylic acid, 3.5 parts;

[0037] Component 7: Dimethylaniline, 1.2 parts;

[0038] Component 8: Portland cement, 0 parts.

[0039] (2) Preparation of low-viscosity high-performance concrete structure rapid repair agent

[0040] Mix and stir epoxy resin, methyl methacrylate, butyl methacrylate, benzoyl peroxide, KH-570, and methacrylic acid at room temperature until the solution becomes transparent, then react at 80°C for 25 minutes. After the viscosity reaches 65mPa·s, it is cooled to room temperature, and finally the curing material dimethylaniline is added in proportion to obtai...

Embodiment 2

[0042] (1) low-viscosity high-performance concrete structure rapid repair agent comprises following components by weight parts:

[0043] Component 1: methyl methacrylate, 100 parts;

[0044] Component 2: butyl methacrylate, 32 parts;

[0045] Component 3: benzoyl peroxide, 3.3 parts;

[0046] Component 4: epoxy resin, 20 parts;

[0047] Component 5: KH-570, 14 parts;

[0048] Component 6: methacrylic acid, 3.7 parts;

[0049] Component 7: Dimethylaniline, 1.0 part;

[0050] Component 8: Portland cement, 10 parts.

[0051] (2) Preparation of low-viscosity high-performance concrete structure rapid repair agent

[0052]Mix and stir epoxy resin, methyl methacrylate, butyl methacrylate, benzoyl peroxide, KH-570, and methacrylic acid at room temperature until the solution becomes transparent, then react at 81°C for 22 minutes. After the viscosity reaches 45mPa·s, cool to room temperature, add inorganic fillers and disperse under ultrasonic for 15 minutes, the measured viscosi...

Embodiment 3

[0054] (1) low-viscosity high-performance concrete structure rapid repair agent comprises following components by weight parts:

[0055] Component 1: methyl methacrylate, 100 parts;

[0056] Component 2: butyl methacrylate, 35 parts;

[0057] Component 3: benzoyl peroxide, 3.8 parts;

[0058] Component 4: epoxy resin, 15 parts;

[0059] Component 5: KH-570, 19 parts;

[0060] Component 6: methacrylic acid, 4.0 parts;

[0061] Component 7: dimethylaniline, 0.8 parts;

[0062] Component 8: Portland cement, 20 parts.

[0063] (2) Preparation of low-viscosity high-performance concrete structure rapid repair agent

[0064] Mix and stir epoxy resin, methyl methacrylate, butyl methacrylate, benzoyl peroxide, KH-570, and methacrylic acid at room temperature. After the solution becomes transparent, the reaction time at 83°C is After 21 minutes, after the viscosity reaches 40mPa·s, cool to room temperature, add inorganic fillers and disperse under ultrasonic for 20min, the measur...

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Abstract

The invention relates to a quick healant with low viscosity and high performance for a concrete structure, belonging to the field of chemical building materials. The quick healant comprises eight components of 100 parts of methyl methacrylate, 28-35 parts of butyl methacrylate, 3.0-3.8 parts of benzoyl peroxide, 15-20 parts of epoxy resin, 10-19 parts of KH-570, 3.5-4.0 parts of methacrylic acid,0.8-1.2 parts of dimethylaniline and 0-20 parts of inorganic filler. The invention not only retains the low viscosity and the high permeability of a polymethyl repairing material, but also has highermechanical strength, lower shrinking rate and favorable durable performance. In addition, the invention can meet the requirement for rapidly repairing microscopic checks of the concrete structure.

Description

technical field [0001] The invention relates to a rapid repair agent mainly used for fine cracks in concrete structures (including airport pavement, expressway pavement, concrete bridges, construction projects, etc.) and a preparation method thereof, belonging to the field of chemical building materials. Background technique [0002] Concrete is a heterogeneous and brittle material. During the formation of its own structure, it is easy to produce micro-cracks due to factors such as temperature shrinkage, chemical shrinkage, and uneven settlement; Effects such as melting cycle can also easily lead to the generation of cracks. If these tiny cracks are not treated in time, under the repeated action of various deterioration factors, they will continue to expand and intensify, and phenomena such as drop corners and broken plates will appear, which will reduce the service life of the structure and affect the stability and safety of the concrete structure. At present, there are fe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B26/10
CPCC04B2111/34C04B2201/10C04B2111/72C04B28/04C04B26/14
Inventor 高培伟耿飞刘冰吕兆萍卢小琳
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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