Self-seepage concrete crack repairing glue and method for making same

A technology for repairing cracks and concrete, which is applied in building maintenance, sea area engineering, adhesive additives, etc. It can solve the problems of slow water volatilization, slow curing of repair glue, hot stickiness, cold brittleness, etc., and achieves simple preparation method and long curing time , the effect of fast curing time

Inactive Publication Date: 2008-07-30
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Acrylic repair materials have the characteristics of low viscosity and fast curing, but have the disadvantages of large volume shrinkage, hot stickiness and cold brittleness
A fast-curing acrylic structural adhesive reported in Chinese patent CN1198460 is a two-component structural adhesive based on vinyl polyurethane and acrylic, which has the advantages of fast curing time and high bond strength, but due to its The formula needs to add a transition metal chelating agent and a substituted dihydropyridine as a reactive diluent, which is cumbersome
Chinese patent CN1247882A reports a two-component polyurethane building sealant and its production process. The two-component polyurethane is terminated with NC...

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Before preparing main component A, first prepare vinyl polyurethane, concrete preparation method is as follows:

[0029] Weigh 58 grams of N-210 polyoxypropylene diol and 50 grams of diphenylmethane diisocyanate after vacuum dehydration, add them into a three-necked flask, control the temperature at 60°C and react under mechanical stirring for 2 hours, then add methacrylic acid hydroxyl 34 grams of propyl ester, heated up to 90°C and reacted for 2 hours, cooled to 25°C, and discharged to obtain vinyl polyurethane.

[0030] In a 2000ml three-necked flask, successively add 100 grams of vinyl polyurethane, 500 grams of hydroxypropyl methacrylate, 500 grams of unsaturated epoxy resin, 2.2 grams of dimethylbenzylamine and 0.5 grams of hydroquinone, and stir evenly, that is Winner component A.

[0031] Mix 49 grams of dimethyl phthalate, 36 grams of benzoyl peroxide and 2 grams of silane coupling agent, and stir evenly to obtain subcomponent B.

[0032] Test methods for pro...

Embodiment 2

[0040]In a 2000ml three-necked flask, sequentially add 300 grams of vinyl polyurethane, 600 grams of butyl methacrylate, 100 grams of unsaturated epoxy resin, 2.2 grams of dimethylbenzylamine and 0.5 grams of hydroquinone, and stir evenly, that is, the winner Component A.

[0041] Mix 49 grams of dibutyl phthalate, 36 grams of benzoyl peroxide and 30 grams of silane coupling agent, and stir evenly to obtain subcomponent B.

[0042] The test method of product performance is the same as embodiment 1.

[0043] When using, prepare the slurry according to the mass ratio of main component A: sub-component B = 50:10, mix well and inject into the crack. The glue starts to solidify in 3 minutes, and the glue solidifies completely after 10 minutes, and the crack repair is completed. The measured properties of the proportioned product in this example are: curing time of 10 minutes, viscosity of 30 cps during application, Shore D hardness of 65 at 22° C., and compressive strength of 28 M...

Embodiment 3

[0045] In a 2000ml three-necked flask, add 100 grams of vinyl polyurethane, 200 grams of methyl methacrylate, 100 grams of butyl acrylate, 600 grams of unsaturated epoxy resin, 10 grams of dimethylbenzylamine and 1 gram of hydroquinone in sequence. , Stir evenly to get the main component A.

[0046] Mix 90 grams of dimethyl phthalate, 5 grams of azobisisobutyronitrile and 5 grams of KH550 silane coupling agent, and stir evenly to obtain subcomponent B.

[0047] Test method is the same as embodiment 1.

[0048] When using, configure the slurry according to the mass ratio of main component A: sub-component B = 50:5, mix well and pour it into the crack. The glue starts to solidify in 4 minutes, and the glue solidifies completely after 15 minutes, and the crack repair is completed. The measured properties of the proportioned product in this example are: curing time 15 minutes, viscosity 50 cps when applied, Shore D hardness 55 at 22°C, and compressive strength 38 MPa.

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PUM

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Abstract

The invention discloses a self-permeating concrete crack repairing glue and the preparing method thereof, which is characterized in that after mixing and stirring evenly 10-15 percent vinyl polyurethane with 10-60 percent vinyl monomer, 10-60 percent unsaturated epoxy resin, 0.1-10 percent accelerant, and 0.01-1 percent polymerization inhibitor according to the weight proportions each constituent accounting for, the main constituent A is obtained when the above mixture is discharged; after mixing and stirring evenly 60-90 percent plasticizing agent with 1-35 percent silane resin acceptor and 1-5 percent evocating agent, and then the accessory constituent B is obtained after the above mixture is discharged. Before in use, main constituent A and accessory constituent B are required to be packed separately, and during in use, the main constituent A and accessory constituent B are required to be mixed together by mixing proportion according to requirements. The invention integrates the advantages of the polyurethane, the epoxy resin, and the acrylic ester into a whole; has the advantages of low viscosity coefficient, self-permeability, quick firming, high strength, high durability and simple operation; can be used for repairing the cracks of the road, the dam or the airdrome.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a self-permeable concrete crack repair glue for roads, dams or airports and a preparation method thereof. Background technique [0002] Concrete is one of the most widely used building materials in engineering construction. In actual engineering, due to the influence of the environmental conditions of the building, improper design, construction quality and other reasons, concrete cracks and other diseases are relatively common. [0003] In the prior art, the most prominent advantage of the epoxy resin slurry mentioned in Chinese patent CN86104918A is that the viscosity of the slurry is relatively small, but its curing time is long, which usually takes several hours to several days; Shorter initial setting time to shorten construction period and improve efficiency. [0004] Acrylic repair materials have the characteristics of low viscosity and fast curing,...

Claims

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Application Information

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IPC IPC(8): C09J163/10C09J11/06E01C11/10E01C9/00E02B3/16E02B8/00E04G23/02C09J175/14
Inventor 许戈文鲍俊杰刘都宝熊潜生
Owner ANHUI UNIVERSITY
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