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Concrete glue reducing agent and preparation method thereof

A technology of concrete and adhesive reducer, which is applied in the field of concrete admixtures, can solve the problems of high preparation environment requirements, and achieve the effects of stable preparation process, simple operation and mild reaction process

Active Publication Date: 2022-01-14
HUZHOU GREEN BUILDING MATERIALS DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The slurry fluidity of this slump-preserving superplasticizer can achieve continuous 3h anti-growth, but the preparation environment requires high requirements, and it is required to be carried out in a nitrogen environment, which cannot be carried out in a conventional environment.

Method used

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  • Concrete glue reducing agent and preparation method thereof
  • Concrete glue reducing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The preparation method of the present embodiment carboxylic acid concrete glue reducer is as follows:

[0032] 1) Mix 85.0g methallyl polyoxyethylene ether (C4), 170.0g isopentenol polyoxyethylene ether (C5), 85.0g GPEG (C6), 32.5g sodium hypophosphite, 10.8g isopropanol , 10.8 g of sodium methylpropene sulfonate, 10.8 g of 30% H2O2, and 148.0 g of water were respectively put into a four-necked flask, and the stirring was started, the condensed water was turned on, and heated to 65°C until all dissolved;

[0033] 2) Add the mixed solution containing 43.3g of itaconic acid, 202.8g of methacrylic acid, 44.6g of water and the mixed solution of 2.35g of vitamin C and 131.4g of water into the four-necked flask respectively, and the dropping time is controlled at 2.5 h, after the dropwise addition, add 24.5g of 2-acrylamide-2-methylpropanesulfonic acid, heat to 85°C, continue to stir for 2h, adjust the pH to 6.0-7.0 with trisodium phosphate, and prepare glue reducer LJ-01 . ...

Embodiment 2

[0035] The preparation method of the present embodiment carboxylic acid concrete glue reducer is as follows:

[0036] 1) Mix 85.0g methallyl polyoxyethylene ether (C4), 85.0g isopentenol polyoxyethylene ether (C5), 170.0g GPEG (C6), 32.5g sodium hypophosphite, 10.8g isopropanol , 10.8g of sodium methacrylate, 10.8g of 30% H2O2, and 148.0g of water were respectively put into a four-neck flask, and the stirring was started, the condensed water was turned on, and heated to 65°C until all dissolved;

[0037] 2) Add the mixed solution containing 43.3g of itaconic acid, 202.8g of methacrylic acid, 44.6g of water and the mixed solution of 2.35g of vitamin C and 131.4g of water into the four-necked flask respectively, and the dropping time is controlled at 2.5 h, after the addition is completed, add 24.5g of 2-acrylamide-2-methylpropanesulfonic acid, heat to 85°C, continue to stir for 2h, adjust the pH to 6.0-7.0 with trisodium phosphate, and prepare the glue reducer LJ-02.

Embodiment 3

[0039] The preparation method of the present embodiment carboxylic acid concrete glue reducer is as follows:

[0040] 1) Mix 170.0g methallyl polyoxyethylene ether (C4), 85.0g isopentenol polyoxyethylene ether (C5), 85.0g GPEG (C6), 32.5g sodium hypophosphite, 10.8g isopropanol , 10.8 g of sodium methylpropene sulfonate, 10.8 g of 30% H2O2, and 148.0 g of water were respectively put into a four-necked flask, and the stirring was started, the condensed water was turned on, and heated to 65 ° C until all dissolved;

[0041]2) Add the mixed solution containing 43.3g of itaconic acid, 202.8g of methacrylic acid, 44.6g of water and the mixed solution of 2.35g of vitamin C and 131.4g of water into the four-necked flask respectively, and the dropping time is controlled at 2.5 h, add 24.5g of 2-acrylamide-2-methylpropanesulfonic acid after the addition is completed, heat to 85°C, continue to stir for 2h, adjust the pH to 6.0-7.0 with trisodium phosphate, and prepare the glue reducer ...

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Abstract

The invention discloses a concrete glue reducing agent which is composed of the following components in percentage by mass: 1.2% to 3.6% of unsaturated carboxylic acid monomer, 1.0% to 1.8% of a chain transfer agent, 34.0% to 50.0% of unsaturated polyether monomers, 2.0% to 3% of an unsaturated nitrogen-containing sulfonic acid monomer, 2.0% to 3.6% of a redox system, 3.5% to 5.5% of water-soluble cellulose, 0.5% to 0.8% of a neutralizing reagent and the balance being water, wherein the unsaturated carboxylic acid monomers comprise unsaturated carboxylic acid monomers with the molecular weight of 60-80 and unsaturated carboxylic acid monomers with the molecular weight of 90-150, and the unsaturated polyether monomers comprise at least two of unsaturated polyether monomers with the molecular weight of 2000-3000, unsaturated polyether monomers with the molecular weight of 2000-3000 and unsaturated polyether monomers with the molecular weight of 5000-6000. The cement reducing agent can effectively improve the dispersity, the plasticization, the slump retaining effect and the early strength of concrete.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, in particular to a carboxylic acid concrete adhesive reducer and a preparation method thereof. Background technique [0002] With the development of cities and the massive consumption of building materials, the environment and resources are facing huge challenges. As the most widely used building material at present, the demand for cement is increasing year by year. In order to save resources, improve the environment and meet the higher requirements of concrete performance in large-scale infrastructure projects at home and abroad, the trend of developing a new type of concrete admixture that can better meet the current social needs is becoming more and more urgent. Concrete reducer is a chemical admixture that can effectively reduce the amount of cementitious materials under the condition that the water-binder ratio remains basically unchanged and the slump and 28d compressive strengt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F285/00C08F220/58C08F283/06C08F220/06C08F222/02C04B24/16
CPCC08F285/00C08F283/065C08F2/38C04B24/165C08F220/06C08F222/02C08F220/585
Inventor 王晓明张海棠崔元超高峰谢旭霞沈佳阳杨晓荣谢伟杰莘金铭
Owner HUZHOU GREEN BUILDING MATERIALS DEV
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