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A kind of anti-salt erosion marine concrete admixture and preparation method thereof

A marine concrete and admixture technology, applied in the field of building material admixtures, can solve problems such as limited effect and inconvenient use, and achieve the effects of improving service life, impermeability, and strength performance

Active Publication Date: 2022-02-22
SHANDONG HONGYI TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Commonly used powder preservatives mostly contain mineral powder (or fly ash, silica fume) and calcium nitrite, which can inhibit the alkali-aggregate reaction of concrete and resist saline-alkali corrosion to a certain extent, but it is not convenient to use and limited effect

Method used

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  • A kind of anti-salt erosion marine concrete admixture and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A marine concrete admixture resistant to salt erosion, prepared from the following raw materials in parts by weight: 10 parts of modified fiber, 5 parts of polycarboxylate water reducer, 5 parts of permeable nano-silicon, and 5 parts of potassium sulfoaluminate , 3 parts of defoamer, 0.1 part of alcohol amine component, 0.1 part of corrosion inhibitor, 20 parts of water.

[0025] The modified fiber is prepared by the following method: adding diethylenetriamine into water, stirring evenly, then adding polyacrylonitrile fiber, heating and reacting, and cooling to obtain modified fiber; the polyacrylonitrile fiber, two The mass ratio of ethylene triamine added is 800:0.1.

[0026] The preparation method of the permeable nano-silicon is as follows: in a water bath at 60°C, add deionized water and potassium fluoride, mix and stir evenly for 40 minutes, then add polyoxyethylene mono-tert-octylphenyl ether, cocoate diethyl alcohol in sequence The amide and sodium dodecylsulfo...

Embodiment 2

[0036] A marine concrete admixture resistant to salt erosion, prepared from the following raw materials in parts by weight: 15 parts of modified fiber, 10 parts of polycarboxylate water reducer, 8 parts of permeable nano-silicon, and 8 parts of potassium sulfoaluminate , 4 parts of defoamer, 1 part of alcohol amine component, 0.3 part of corrosion inhibitor, 25 parts of water.

[0037] The modified fiber is prepared by the following method: adding diethylenetriamine into water, stirring evenly, then adding polyacrylonitrile fiber, heating and reacting, and cooling to obtain modified fiber; the polyacrylonitrile fiber, two The mass ratio of ethylene triamine added is 800:0.3.

[0038] The preparation method of the permeable nano-silicon is as follows: in a water bath at 60°C, add deionized water and potassium fluoride, mix and stir evenly for 40 minutes, then add polyoxyethylene mono-tert-octylphenyl ether, cocoate diethyl alcohol in sequence The amide and sodium dodecylsulfon...

Embodiment 3

[0048] A marine concrete admixture resistant to salt erosion, prepared from the following raw materials in parts by weight: 20 parts of modified fiber, 15 parts of polycarboxylate water reducer, 10 parts of permeable nano-silicon, and 10 parts of potassium sulfoaluminate , 5 parts of defoamer, 1.5 parts of alcohol amine component, 0.5 part of corrosion inhibitor, 30 parts of water.

[0049] The modified fiber is prepared by the following method: adding diethylenetriamine into water, stirring evenly, then adding polyacrylonitrile fiber, heating and reacting, and cooling to obtain modified fiber; the polyacrylonitrile fiber, two The mass ratio of ethylene triamine added is 800:0.5.

[0050] The preparation method of the permeable nano-silicon is as follows: in a water bath at 60°C, add deionized water and potassium fluoride, mix and stir evenly for 40 minutes, then add polyoxyethylene mono-tert-octylphenyl ether, cocoate diethyl alcohol in sequence The amide and sodium dodecyls...

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Abstract

The invention discloses a salt erosion-resistant marine concrete admixture and a preparation method thereof, belonging to the technical field of building material admixtures. The admixture of the present invention is prepared from raw materials comprising the following parts by weight: 10-20 parts of modified fiber, 5-15 parts of polycarboxylate water reducer, 5-10 parts of permeable nano-silicon, and 5-10 parts of potassium sulfoaluminate 10 parts, 3-5 parts of defoamer, 0.1-1.5 parts of alcohol amine component, 0.1-0.5 parts of corrosion inhibitor, 20-30 parts of water. The addition of modified fibers can greatly improve the strength of concrete. High-permeability nanomaterials are evenly dispersed and react with alkaline substances in cement, effectively preventing the intrusion of harmful substances such as chloride ions. At the same time, aluminum potassium sulfate and alcohol amine groups are also added. The components and slow-release additives, the joint action of each raw material significantly improves the impermeability, sulfate erosion resistance and chloride ion erosion performance of marine concrete, so as to achieve the purpose of improving the service life of marine concrete.

Description

technical field [0001] The invention belongs to the technical field of building material admixtures, and in particular relates to a salt erosion-resistant marine concrete admixture and a preparation method thereof. Background technique [0002] With the rapid development of the economy, large-scale civil engineering projects such as subways and bridges have also been constructed, and the durability problem has become increasingly prominent. Some domestic projects have even experienced abnormal phenomena of maintenance while construction, especially the corrosion of steel bars in marine concrete projects is more serious. [0003] The main causes of marine concrete damage are: corrosion of steel bars, freezing damage in cold climates, physical and chemical effects of environmental erosion, and so on. Corrosion of steel bars is the main cause of concrete damage. Corrosion of steel bars in concrete can be induced by two factors, one is Cl in seawater - erosion, and the second...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/24C04B20/02C04B103/61
CPCC04B40/0039C04B20/023C04B2103/61
Inventor 秦尤敏陈烽鲁江张辉司宏振宋南京吕晓李耀郭祥金
Owner SHANDONG HONGYI TECH
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