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Preservative for concrete admixture and preparation method thereof

A concrete admixture and preservative technology, applied in the field of preservatives, can solve the problems of lack of inhibition of mold growth and reproduction, influence of concrete performance, and high cost of protective layer, and achieves good anti-corrosion and mildew-proof effect, more concrete slurry, and compatibility. good effect

Active Publication Date: 2021-06-15
GUIZHOU KEZHIJIE NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] CN201510397694 discloses a concrete preservative: Aiming at the problem of poor corrosion resistance of sulfate cement used in the prior art and high cost of the protective layer, a concrete preservative is provided. The method uses the buffering effect between acid and alkali, Fills voids and makes concrete stronger
However, this technology cannot solve the problem of mildew due to lack of the problem of inhibiting the growth and reproduction of mold in the admixture
Moreover, although many preservatives currently have a certain bactericidal and antibacterial effect, they will affect the performance of the concrete itself during subsequent use.

Method used

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  • Preservative for concrete admixture and preparation method thereof
  • Preservative for concrete admixture and preparation method thereof
  • Preservative for concrete admixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] In parts by weight, 6 parts of acetic acid and 42 parts of water are made into solution A, 9 parts of tristyrylphenol polyoxyethylene ether components and 32 parts of water are made into solution B, and 15 parts of N-cyclopropyl- N'-(1,1-dimethylethyl)-6-(methylthio)-1,3,5-triazine-2,4-diamine and 108 parts of water were added to the reactor, and the temperature was adjusted. Stir to dissolve, and when the temperature rises to 85°C, add 13 parts of 2-n-octyl-4-isothiazolin-3-one into the reaction kettle; After the dropwise addition, start to add solution B dropwise at a constant speed for 2 hours. After the dropwise addition, keep the temperature constant for 2 hours to obtain a preservative E1 for concrete admixture.

Embodiment 2

[0026] In parts by weight, 9 parts of tristyrylphenol polyoxyethylene ether components and 74 parts of water are formulated into solution A, and 15 parts of N-cyclopropyl-N'-(1,1-dimethylethyl )-6-(methylthio)-1,3,5-triazine-2,4-diamine and 108 parts of water were added to the reaction kettle, the temperature was adjusted, stirred and dissolved, and when the temperature rose to 85°C, 13 parts Mix 2-n-octyl-4-isothiazolin-3-one into the reaction kettle; stir for one hour, start to add solution A dropwise at a constant speed, and the dropping time is 2 hours. After the dropping, keep the temperature for 2 hours to obtain a Preservative E2 for concrete admixture.

Embodiment 3

[0028] 8 parts of phosphoric acid and 45 parts of water are made into solution A, 13 parts of fatty alcohol polyoxyethylene ether and 38 parts of water are made into solution B, and 12 parts of 2,2-dibromo-3-cyano(nitrile) propionamide Add 105 parts of water into the reaction kettle, adjust the temperature, stir and dissolve, and when the temperature rises to 85°C, add 15 parts of 2-n-octyl-4-isothiazolin-3-one into the reaction kettle; then add it dropwise at a constant speed Solution A, the dropping time is 1.5h. After the solution A is added dropwise, start to add solution B dropwise at a constant speed. The dropping time is 2h. .

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Abstract

The invention relates to a preservative for concrete admixture and a preparation method thereof. The raw materials include the following components in parts by weight: 10-23 parts of bactericidal components, 10-20 parts of antibacterial components, and 5-20 parts of intermediate active components. 15 parts, 8 to 13 parts of anti-precipitation components. The present invention has a small amount in the concrete admixture, and when mixed into liquid admixtures such as water reducer, slump retaining agent, and wet-mixed mortar additive, it will not separate out, has good compatibility with the concrete admixture, and is anti-corrosion and mildew-proof. Good effect, can effectively inhibit the growth and reproduction of microorganisms such as yeast, bacteria and mold. When the pH value of the concrete admixture is 2-7, the bactericidal effect of the preservative of the present invention is the best, and the preservative of the present invention will degrade naturally in concrete and has no adverse effect on the environment.

Description

technical field [0001] The invention relates to the technical field of preservatives, in particular to a preservative for concrete admixtures and a preparation method thereof. Background technique [0002] In the process of concrete production and construction, most of the concrete admixtures exist in liquid form, and the mother liquid of water reducing agent and slump retaining agent is stored for a long time and is not easy to deteriorate. However, the concrete structure is very complex, and the mother liquor alone cannot meet the performance requirements of concrete construction. In the process of use, it is necessary to add some small materials, such as sugar, glucose, etc., to improve the concrete state. These small materials are easy to breed mold, yeast, bacteria and other fungi, especially in high temperature and humid environment, the fungi have high reproductive ability. If no preservatives are added, the admixture will deteriorate within three days. This deteriora...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/32C04B24/42C04B103/69
Inventor 蒋禹邓磊陈文红沈建荣
Owner GUIZHOU KEZHIJIE NEW MATERIAL
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