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Admixture for improving corrosion resistance of concrete reinforcement and preparation method thereof

A concrete reinforcement and corrosion-resistant technology, applied in the field of concrete additives, can solve problems such as poor anti-corrosion effect, achieve long-lasting rust resistance, good adaptability, and improve the effect of protection ability

Active Publication Date: 2022-04-29
海南省众邑新材料研究院有限公司
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  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the existing admixtures have poor anti-corrosion effects and cannot be well adapted to environments where concrete steel bars are prone to corrosion such as the ocean. Therefore, there is an urgent need for an admixture that improves the corrosion resistance of concrete steel bars and its preparation method

Method used

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  • Admixture for improving corrosion resistance of concrete reinforcement and preparation method thereof
  • Admixture for improving corrosion resistance of concrete reinforcement and preparation method thereof

Examples

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preparation example Construction

[0031] The preparation method of above-mentioned additive, comprises the following steps:

[0032] S1. Preparation of component A: Mix acrylic acid polypropylene glycol monomethyl ether and maleic anhydride diethylene glycol monobutyl ether and heat up to 75-80°C, add methacrylic acid and 2-methyl-2-methyl acrylate dropwise and sodium methacryl sulfonate solution, dripping for 5.5-6.5 hours, then heating up to 90-100°C, keeping warm for 1.5-2.5 hours to obtain component A;

[0033] S2. Preparation of component B: use oleic acid and polyamines as raw materials to synthesize the intermediate of component B. The reaction conditions are acylation temperature of 155-165°C, acylation time of 1.5-2.5h, and cyclization temperature of 190-210°C , The cyclization time is 9-11 hours, and the intermediate of component B is obtained; the intermediate of component B is reacted with the quaternization reagent at 75-85°C for 1.5-2.5 hours, and component B is obtained;

[0034] S3. Preparatio...

Embodiment 1

[0037] An admixture for improving the corrosion resistance of concrete steel bars, comprising the following mass percent raw materials: 30% component A, 30% component B, and 40% component C; wherein,

[0038] The A component is made from the following mass percent raw materials: 80% acrylic acid polypropylene glycol monomethyl ether monomer, 4% maleic anhydride diethylene glycol monobutyl ether, 10% methacrylic acid, 3% 2-methyl- 2-Methyl acrylate, 3% sodium methacrylate;

[0039] The B component is made from the following molar ratio raw materials: the molar ratio of oleic acid, polyamine, and dimethyl sulfate is 1:1.3:1; the C component is made from the following mass percentage raw materials: 5% citric acid Sodium, 7% Sodium Hydroxide, 88% Water.

Embodiment 2

[0041] An admixture for improving the corrosion resistance of concrete steel bars, comprising the following mass percentage raw materials: 25% component A, 25% component B, 50% component C; wherein,

[0042] The A component is made from the following mass percent raw materials: 85% acrylic acid polypropylene glycol monomethyl ether monomer, 3% maleic anhydride diethylene glycol monobutyl ether, 5% methacrylic acid, 2% 2-methyl- 2-Methyl acrylate, 5% sodium methacrylate;

[0043] The B component is made from the following molar ratio raw materials: the molar ratio of oleic acid, polyamine, and dimethyl sulfate is 1:1.3:1; the C component raw material is made from the following mass percentage raw materials: 6% lemon sodium hydroxide, 4% sodium hydroxide, 90% water.

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Abstract

The invention provides an admixture for improving the corrosion resistance of concrete steel bars and a preparation method thereof. The admixture includes the following raw materials in mass percentages: 20-30% of component A, 20-30% of component B, and 40-30% of component C 60%; wherein, the A component is composed of acrylic acid polypropylene glycol monomethyl ether, maleic anhydride diethylene glycol monobutyl ether, methacrylic acid, 2-methyl-2-methyl acrylate and sodium methacrylic acid prepared; the B component is prepared from oleic acid, polyamine, and quaternizing reagent; the C component is prepared from sodium citrate, sodium hydroxide and water. The components of the invention have scientific proportions and synergistic effects, and have the characteristics of good adaptability to cement, small dosage, high water reducing rate, good corrosion resistance, and long duration of rust inhibition, which can effectively prevent chloride ions from blunting steel bars. The destruction of the chemical film improves the corrosion resistance of concrete reinforcement and prolongs the service life of reinforced concrete structures.

Description

technical field [0001] The invention relates to the technical field of concrete additives, in particular to an admixture for improving the corrosion resistance of concrete steel bars and a preparation method thereof. Background technique [0002] As the fifth component of concrete raw materials, admixtures are widely used in the concrete industry. The most widely used admixture is the water reducing agent, its main function is to reduce the water consumption of concrete mixing while ensuring the workability of the concrete, so as to improve the strength of the concrete. [0003] In reinforced concrete structures, the corrosion damage of steel bars is the primary factor affecting the durability of structures. In foreign countries, corrosion of steel bars accounts for about 40% of the corrosion loss; , The general service life of building structures cannot reach the design requirements, and in the marine environment, the corrosion of steel bars is more serious. [0004] How...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/32C04B103/61
CPCC04B40/0039C04B2103/61C04B24/32C04B24/023C04B24/04C04B24/2641C04B24/16C04B24/085C04B24/121C04B24/06C04B22/062C04B22/002
Inventor 陈宏哲王登科王亚婕宋新乐王腾胡俊鹏盛受山康秀晗
Owner 海南省众邑新材料研究院有限公司
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