Powder-acrylate composite grouting material and preparation method and application thereof

An acrylate and grouting material technology, which is applied to building insulation materials, mining equipment, shaft equipment, etc., can solve the problem of not involving the production process of acrylate grouting liquid, no description of acrylate composite grouting materials, and insufficient cohesiveness of concrete interface, etc. problem, to achieve the ideal grouting effect, increase strength and elasticity, and improve the effect of bonding performance

Active Publication Date: 2014-05-07
GUANGZHOU CHEM GROUTING CO LTD CAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the consolidated body of pure acrylate grout has disadvantages such as low strength and insufficient adhesion to the concrete interface.
Invention patent 200810301292.7 discloses an acrylate grouting fluid and its preparation method. The invention patent lists the types of crosslinking agents that can be used and the performance of the acrylate grouting fluid, but does not involve the production process of the acrylate grouting fluid. There is also no description of how the powder-acrylate composite grout was formulated

Method used

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  • Powder-acrylate composite grouting material and preparation method and application thereof
  • Powder-acrylate composite grouting material and preparation method and application thereof
  • Powder-acrylate composite grouting material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0052] (1) Preparation of mixture of acrylate salt solution and crosslinking agent

[0053] Add 79.26g of acrylic acid into a reactor with a reflux condenser, heat to 45°C, and add dropwise a mixture of 60.0g of 2-propanol, 0.42g of concentrated sulfuric acid and 0.21g of hydroquinone under stirring. The mixed solution was heated up to 120°C after the dropwise addition and continued to react for 6 hours. When the pH=2.60 was measured as the end point of the reaction, it was cooled to obtain a mixture of 2-propanol acrylate and acrylic acid, which was set aside;

[0054]Add 100 g of the mixture of 2-propanol acrylate and acrylic acid for use into the reactor, add 150 g of water and stir evenly, slowly add 16 g of magnesium carbonate and 8 g of calcium carbonate in batches under agitation, open the reactor jacket cooling water , and start the decompression device to remove the carbon dioxide gas generated by the neutralization reaction, continue to react for 2 hours, finally add...

Embodiment 2

[0063] (1) Preparation of the mixture of acrylate aqueous solution and crosslinking agent

[0064] Add 79.26 g of acrylic acid into a reactor with a reflux condenser, heat it to 45 ° C, and add dropwise 102.0 g of 2-hexanol, 0.54 g of p-toluenesulfonic acid and 0.27 g of hydroquinone under stirring. The prepared mixed solution was heated to 120° C. and continued to react for 6 hours after the dropwise addition, and the reaction end point was measured when pH=2.60, and cooled to obtain a mixture of 2-hexanol acrylate and acrylic acid, which was used for subsequent use;

[0065] Add 75g of the mixture of 2-hexanol acrylate and acrylic acid for standby into the reactor, add 150g of water and stir evenly, slowly add 12g of magnesium carbonate and 6g of calcium carbonate in batches under stirring, open the reactor jacket cooling water , and start the decompression device to remove the carbon dioxide gas generated by the neutralization reaction, continue the reaction for 2 hours, fi...

Embodiment 3

[0074] (1) Preparation of the mixture of acrylate aqueous solution and crosslinking agent

[0075] 79.26g of acrylic acid was added to the reactor with reflux condenser, heated to 45°C, and 130.0g of 2-octanol, 0.62g of p-toluenesulfonic acid and 0.31g of 2,6-octanol were added dropwise under stirring. The mixed solution prepared by di-tert-butyl-p-cresol was heated to 120° C. and continued to react for 6 hours after the dropwise addition. When pH=2.60 was determined, the reaction end point was determined, and the mixture was cooled to obtain a mixture of 2-octanol acrylate and acrylic acid, which was used for later use;

[0076] Add 50 g of the mixture of 2-octanol acrylate and acrylic acid for subsequent use into the reactor, add 200 g of water and stir evenly, slowly add 8 g of magnesium carbonate and 4 g of calcium carbonate in batches under agitation, open the reactor jacket cooling water , and start the decompression device to remove the carbon dioxide gas generated by t...

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Abstract

The invention discloses a preparation method and application of a powder-acrylate composite grouting material. The material is prepared from a component A and a component B according to weight ratio of (1:1)-(1:4), wherein the component A comprises the following raw materials by weight percent: 95.0%-99.0% of mixture of acrylate water solution and cross-linking agent and 1.0%-5.0% of initiator, the component B comprises the following raw materials by weight percent: 47.5%-49.5% of powder, 1.0%-1.5% of accelerator, and 49.5%-51.0% of water, the compressive strength of concretion body 28d is 12-18MPa, and the bonding strength is 0.5-1.3MPa. In the preparation process, no cross-linking agent is needed, so that the production technology is simplified; the powder is added for compound grouting, so that the adhesive property of the acrylate concretion body and the interface of concrete can be improved. The material can be used in the engineering parts with water.

Description

technical field [0001] The invention belongs to the field of building materials, in particular to a powder-acrylate composite grouting material and its preparation method and application. Background technique [0002] Acrylate grout was first used by the U.S. Navy and the Massachusetts Institute of Technology for foundation reinforcement in military engineering in the 1940s. Kyoto University and Kyushu University in Japan began to study the calcium acrylate grouting method in 1954. At that time, acrylic acid could not be produced in large quantities, so that this slurry could not be widely used. By the 1970s, the price of acrylic acid in Japan was relatively cheap, and acrylate grouting materials were widely used in Japan. [0003] Since the 1970s, the Guangzhou Institute of Chemistry, the Chinese Academy of Sciences, the Institute of Water Resources and Hydropower Research, and the Yangtze River Academy of Sciences have conducted research on acrylate slurries, and have ob...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L33/02C04B28/00C04B26/06E21D11/38E02D31/02E04B1/66
Inventor 徐宇亮杨元龙张维欣张文超陈耀辉
Owner GUANGZHOU CHEM GROUTING CO LTD CAS
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