Anti-erosion concrete admixture and preparation method thereof

A concrete admixture, anti-corrosion technology, applied in the direction of chemical instruments and methods, inorganic chemistry, non-metallic elements, etc., can solve the problems of erosion, material strength threat, increase cost, etc., achieve low addition amount, slow down the erosion process, increase The effect of compactness

Pending Publication Date: 2021-09-28
日照联汇建材有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main mechanism of action of these admixtures is to increase the density of the material and reduce the intrusion of harmful ions. This type of admixture uses physical means to block the intrusion of sulfate ions, and cannot fundamentally solve the problem of sulfate erosion. Once the material If the compactness is destroyed, the sulfate will accelerate the erosion, which will increase the cost, and the material strength will be seriously threatened

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  • Anti-erosion concrete admixture and preparation method thereof
  • Anti-erosion concrete admixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An anti-corrosion concrete admixture, prepared from the following raw materials in parts by weight: 30 parts of fly ash, 10 parts of ultrafine slag powder, 5 parts of modified expansion agent, 5 parts of water reducing agent, and 3 parts of grinding aid components share.

[0029] In this embodiment, the preparation method of the ultra-fine slag micropowder is as follows: put the blast furnace slag in a vertical mill for grinding for 30 minutes, then add the abrasive into the ball mill, add ethanol solution according to the ratio of material to liquid at 1:5, and then add the mass of the mixture 1% of cetyltrimethylammonium bromide was mixed and ball milled for 5 hours to obtain superfine slag powder.

[0030] In this embodiment, the specific surface area of ​​the ultrafine slag powder is greater than 300m 2 / kg.

[0031] In the embodiment of the present application, the preparation method of the modified expansion agent is as follows: uniformly disperse bentonite into...

Embodiment 2

[0044] An anti-corrosion concrete admixture, prepared from the following raw materials in parts by weight: 40 parts of fly ash, 15 parts of ultrafine slag powder, 8 parts of modified expansion agent, 8 parts of water reducing agent, and 5 parts of grinding aid component share.

[0045] In this embodiment, the preparation method of the ultrafine slag micropowder is as follows: put the blast furnace slag in a vertical mill for grinding for 40 minutes, then add the abrasive into the ball mill, add ethanol solution according to the ratio of material to liquid at 1:5, and then add the mass of the mixture 1% of cetyltrimethylammonium bromide was mixed and ball milled for 5 hours to obtain superfine slag powder.

[0046] In this embodiment, the specific surface area of ​​the ultrafine slag powder is greater than 300m 2 / kg.

[0047] In this embodiment, the preparation method of the modified expansion agent is: uniformly disperse bentonite into dimethyl diallyl ammonium chloride sol...

Embodiment 3

[0060] An anti-corrosion concrete admixture, prepared from the following raw materials in parts by weight: 50 parts of fly ash, 20 parts of ultrafine slag powder, 10 parts of modified expansion agent, 10 parts of water reducing agent, and 8 parts of grinding aid components share.

[0061] In this embodiment, the preparation method of the ultrafine slag micropowder is as follows: put the blast furnace slag in a vertical mill for grinding for 50 minutes, then add the abrasive into the ball mill, add ethanol solution according to the ratio of material to liquid at 1:5, and then add the mass of the mixture 1% of cetyltrimethylammonium bromide was mixed and ball milled for 5 hours to obtain superfine slag powder.

[0062] In this embodiment, the specific surface area of ​​the ultrafine slag powder is greater than 300m 2 / kg.

[0063] In this embodiment, the preparation method of the modified expansion agent is: uniformly disperse bentonite into dimethyl diallyl ammonium chloride ...

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Abstract

The invention discloses an anti-erosion concrete admixture and a preparation method thereof, belonging to the technical field of building materials. The concrete admixture is prepared from 30-50 parts of fly ash, 10-20 parts of superfine slag powder, 5-10 parts of a modified expanding agent, 5-10 parts of a water reducing agent and 3-8 parts of a grinding aid component. According to the invention, erosion resistance is realized through two dimensions; firstly, the fly ash and the superfine slag powder are added, so formation of sulfate erosion products is effectively prevented from a chemical level; secondly, fine gaps of a cement material are fully filled with the expanding agent and other components, so the compactness of the material is increased, and the overall strength of the material is improved; and the superfine slag powder and the modified expanding agent cooperate with each other, so the sulfate attack resistance of the material is jointly improved. The additive is low in addition amount; the preparation method is simple; a test piece still meets use requirement after being eroded by high-concentration sulfate for 120 days; and thus, the additive has wide market prospects.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to an anti-corrosion concrete admixture and a preparation method thereof. Background technique [0002] Concrete has developed into a product that is closely related to our lives and has become an essential material for national infrastructure. However, with the continuous application and exploration of concrete, the disadvantages of concrete structures have been exposed, such as in coastal areas, saline soil, Due to the existence of corrosive substances such as sulfate in areas such as saline-alkali land, bridge pile foundations, caps, piers, road subgrades, and building foundations have suffered serious damage. Because people neglect the damage caused by this type of erosion to the concrete structures in the above-mentioned areas, the phenomenon of economic loss and casualties is common. Therefore, in recent years, there are more and more researches on sulfa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B22/08C01B33/44C01B33/40C04B22/00C04B103/61
CPCC04B40/0039C04B22/0006C04B22/08C01B33/40C01B33/44C04B2103/61C04B2103/302C04B2103/52
Inventor 匡利君井富磊
Owner 日照联汇建材有限公司
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