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High-strength concrete interfacial agent and preparation method thereof

A technology of concrete and interface agent, which is applied in the field of building materials, can solve problems such as poor adhesion and waterproof performance, and achieve good balance, good water-reducing effect, and the effect of preventing cracking

Inactive Publication Date: 2019-07-12
薛银福
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a high-strength concrete interface agent and its preparation method in view of the problems of poor adhesion and waterproof performance of the current concrete interface agent

Method used

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  • High-strength concrete interfacial agent and preparation method thereof

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preparation example Construction

[0028] The preparation method of anti-pollution interface additive is:

[0029] (1) Take 4,4-diphenyl ether dicarboxylic acid and add N,N-dimethylformamide according to the mass ratio of 80~100:1~3, then add 2~5 times the mass of 4,4-diphenyl ether dicarboxylic acid Thionyl chloride, heated up to 70~80°C, stirred and mixed for 3~5h, distilled under reduced pressure, filtered, took the filter cake and added petroleum ether at a mass ratio of 2~5:10~15, let it stand for 20~50min, took the precipitate and dried it, To obtain dry matter, take methyl acrylate and add dropwise to 3,3'-di-tert-butyl-4,4'-diaminodiphenyl-4"-tert-butylphenyl in a mass ratio of 4~7:10~15 In methane, stir and mix at 70-80°C for 2-4 hours, and distill under reduced pressure to obtain a reduced-pressure distillate;

[0030](2) Take the vacuum distillate and add chloroform according to the mass ratio of 2~5:5~10, add pyridine with a mass ratio of 2~5% of the vacuum distillate, stir and mix for 20~30min to ...

Embodiment 1

[0041] The thermoplastic styrene-butadiene rubber SBS4402 is: the content ratio of styrene and butadiene is 40:60.

[0042] The preparation method of anti-pollution interface additive is:

[0043] (1) Take 4,4-diphenyl ether dicarboxylic acid and add N,N-dimethylformamide at a mass ratio of 80:1, then add thionyl chloride twice the mass of 4,4-diphenyl ether dicarboxylic acid, Stir and mix for 3 hours at 70°C, distill under reduced pressure, filter, take the filter cake and add petroleum ether at a mass ratio of 2:10, let it stand for 20 minutes, take the precipitate and dry it to obtain a dry product, take methyl acrylate and add it dropwise at a mass ratio of 4:10 into 3,3'-di-tert-butyl-4,4'-diaminodiphenyl-4"-tert-butylphenylmethane, stirred and mixed at 70°C for 2 hours, and distilled under reduced pressure to obtain a reduced-pressure distillate;

[0044] (2) Take the vacuum distillate and add chloroform at a mass ratio of 2:5, add pyridine with a mass ratio of 2% of th...

Embodiment 2

[0055] The thermoplastic styrene-butadiene rubber SBS4402 is: the content ratio of styrene and butadiene is 40:60.

[0056] The preparation method of anti-pollution interface additive is:

[0057] (1) Take 4,4-diphenyl ether dicarboxylic acid and add N,N-dimethylformamide at a mass ratio of 90:2, then add thionyl chloride three times the mass of 4,4-diphenyl ether dicarboxylic acid, Stir and mix for 4 hours at 75°C, distill under reduced pressure, filter, take the filter cake and add petroleum ether at a mass ratio of 4:12, let it stand for 35 minutes, take the precipitate and dry it to obtain a dry product, take methyl acrylate and add it dropwise at a mass ratio of 6:13 into 3,3'-di-tert-butyl-4,4'-diaminodiphenyl-4"-tert-butylphenylmethane, stirred and mixed at 75°C for 3 hours, and distilled under reduced pressure to obtain a reduced-pressure distillate;

[0058] (2) Take the vacuum distillate and add chloroform at a mass ratio of 3:7, add pyridine with a mass ratio of 4%...

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Abstract

The invention discloses a high-strength concrete interfacial agent and a preparation method thereof and belongs to the technical field of building materials. On one hand, introduced carboxyl participates in a hydration reaction of interfacial concrete to have a better water reduction function and increase the structure strength of gel of an interface material, on the other hand, by use of a long hydrocarbon chain hydrophobic group and good water solubility, a hydrophilic group is linked, the surface tension is reduced, so that residues are reduced after release through an oily release agent, and interface pollution is reduced. By use of own characteristics of elastomers and better toughness and elasticity of the elastomers, part of swelling stress during interface bonding is reduced to prevent cracking, and the mechanical performance of an interface is increased; an acid complexing agent is added, so that capillary pores are filled, the compactness in the bonding position is increased,absorption of CO2 is kept in the alkaline environment, growth of calcium carbonate crystals is promoted, and the interface performance is enhanced. The problem of poor bonding power and waterproof performance of concrete interfacial agents at present is solved.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a high-strength concrete interface agent and a preparation method thereof. Background technique [0002] In the construction, reconstruction and reinforcement of bridges, tunnels and houses, the combination of old and new concrete interfaces is often involved. According to the relevant theory of the interface, the combination of materials is the weakest at the interface, and most of the damage occurs at the interface. Or start with the interface. The quality of the interface between new and old concrete directly affects the quality of the construction project. If the interface adhesion is not enough, phenomena such as cracks, peeling, and peeling will occur, which will damage the function and safety of the overall structure again. [0003] Concrete interface agent is also called interface adhesive and interface agent. At present, the interface agents used...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D109/06C09D133/12C09D183/04C09D7/63
CPCC09D7/63C09D109/06C09D133/12C09D183/04C08L33/12C08L83/04C08K5/098
Inventor 薛银福
Owner 薛银福
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