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A durable polyacrylamide crack repair agent and its preparation method

A polyacrylamide-based and polyacrylamide-based technology, which is applied in the field of durable polyacrylamide-based crack repairing agent and its preparation, can solve the problems of low shrinkage rate durability, complex preparation process, low viscosity, etc. Combined ability and durability, adjustable and controllable process, strong adhesion and peeling resistance

Active Publication Date: 2017-10-31
JIANGSU CHINA RAILWAY ARIT NEW MATEIRALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of material has the effect of bonding and sealing repair strength, but it is prone to decomposition, crosslinking and aging, which affects its durability
Patent CN1884422 discloses a modified vinyl ester resin grouting material and its preparation method and construction method. The patent has low viscosity and strong permeability, but the preparation process is complicated, and multi-step modified vinyl ester resin is required. Construction requires 2 ~4 days, hard to fix quickly
Patent CN101786831 A discloses a low-viscosity high-performance concrete structure rapid repair agent. The invention has high mechanical strength, low shrinkage rate and good durability, but the invention is only suitable for rapid repair of some micro cracks. Insufficient repair performance for large area damage

Method used

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  • A durable polyacrylamide crack repair agent and its preparation method

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Effect test

Embodiment 1

[0024] Preparation of polyacrylamide-based macromolecular compounds: Add 100g of trimethylhydroxyethylsilane and 120g of water into the reaction kettle, raise the temperature to 40°C, add 1g of hydrogen peroxide, add dropwise a mixed solution of 5g of acrylamide and 30g of water, and simultaneously A mixed solution of 0.15 g of vitamin C, 0.2 g of thioglycolic acid, and 84.65 g of water was added dropwise. The dropping time is 3h. After the reaction, the mass concentration of the prepared polyacrylamide-based macromolecular compound is 35%;

[0025] Preparation of crack repair agent: 360g of polyacrylamide polymer compound with a mass concentration of 35%, 50g of hydroxypropyl-β-cyclodextrin, 100g of sodium dodecylbenzenesulfonate, 50g of phenolic resin, and 440g of water were placed In the reactor at 30 ° C temperature can be stirred for 180 minutes in the system.

Embodiment 2

[0027] Preparation of polyacrylamide-based macromolecular compounds: Add 100g of isobutyltrimethoxysilane and 80g of water into the reaction kettle, raise the temperature to 30°C, add 3g of hydrogen peroxide, and drop a mixed solution of 8g of methacrylamide and 20g of water , while adding dropwise a mixed solution of 0.18g sodium bisulfite, 0.6g mercaptopropionic acid, and 67.67g water. The dropping time is 4h. After the reaction, the mass concentration of the prepared polyacrylamide-based macromolecular compound is 40%;

[0028] Preparation of crack repair agent: 250g of polyacrylamide polymer compound with a mass concentration of 40%, 150g of α-monohydroxycyclodextrin, 120g of gum arabic, 80g of epoxy resin, and 400g of water were placed in a reaction kettle at 50°C It can be obtained by stirring at low temperature for 120 minutes.

Embodiment 3

[0030] Preparation of polyacrylamide-based macromolecular compounds: Add 200g of methyldiphenylhydroxyethylsilane and 170g of water into the reaction kettle, raise the temperature to 50°C, add 4g of ammonium persulfate, then add dropwise a mixture of 24g of caprolactam and 50g of water solution, while adding dropwise a mixed solution of 0.46g sodium bisulfite, 2g mercaptoethanol, and 61.66g water. The dropping time is 5h. After the reaction, the mass concentration of the prepared polyacrylamide-based macromolecular compound is 45%;

[0031] Preparation of crack repair agent: 300g of polyacrylamide polymer compound with a mass concentration of 45%, 100g of hydroxypropyl-β-cyclodextrin, 160g of propylene glycol fatty acid ester, 100g of sodium carboxymethylcellulose, and 340g of water were placed It can be obtained by stirring at 60°C for 90 minutes in a reaction kettle.

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Abstract

The invention relates to a durable type polyacrylamide-series crack repair agent and a preparation method thereof, and is characterized in that the repair agent comprises the following raw materials by the mass percentage according to the total amount of the raw materials: 25%-36% of a polyacrylamide high-molecular compound, 5%-15% of a cyclodextrin hydroxyl derivative, 10%-16% of an emulsifier, 5%-10% of an organic binder, and 25%-44% of water. The preparation method comprises the steps of weighing the raw materials according to the proportion, and stirring for 30 min-180 min at the temperature of 30-80 DEG C. A silane monomer and acrylamide are copolymerized into the high-molecular compound, and the repair agent has the advantages of self permeability, fast curing, adhesion and anti-removing property, strong durability, and simple operation, and is applied to roads, bridges, airports and other crack repair engineering.

Description

technical field [0001] The invention belongs to the technical protection field of building materials, and in particular relates to a durable polyacrylamide crack repair agent and a preparation method thereof. Background technique [0002] my country's highway pavement is mainly based on asphalt concrete pavement. With the increase of the service life of the project and the rapid increase of traffic volume, especially the development of heavy-duty vehicle transportation industry, the rolling loss of roads and bridges is becoming more and more serious. Cracks become one of the main hazards of asphalt concrete pavement. The existence of cracks greatly damages the integrity, continuity and strength of the pavement structure, resulting in a decrease in the bearing capacity of the pavement mechanism. Therefore, the repair of pavement cracks requires not only construction technical support, but also the performance of the concrete pavement crack repair agent, which has extremely im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B41/64C08F283/12C08F220/56
CPCC04B41/4988C04B41/64C04B2111/72C08F283/122C04B41/4853C04B41/4823C04B41/4803C04B41/46C04B41/4539C08F220/56
Inventor 仇影丁蓓郭兆来郑春扬姜海东王毅王高明
Owner JIANGSU CHINA RAILWAY ARIT NEW MATEIRALS CO LTD
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