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Modified aluminum-silicon particles and modifier thereof

A modifier, aluminum-silicon technology, applied in the field of cement additives, can solve the problems of poor chloride ion curing ability, poor adaptability, poor stability, etc., and achieve the effect of improving the curing rate, reducing the amount of cement, and increasing the range.

Inactive Publication Date: 2018-09-14
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, there are no mature chloride ion curing products on the market. Some chloride ion curing products on the market either have poor ability to cure chloride ions, or have poor adaptability, poor stability, and high cost.

Method used

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  • Modified aluminum-silicon particles and modifier thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] First add 10 parts of methoxypolyethylene glycol acrylate and 17 parts of water into the reaction kettle, raise the temperature to 40 degrees, heat for 30 minutes, and then add 0.5 parts of hydrogen peroxide at one time. Add 2 parts of acrylic acid to 2 parts of water to make material A; add 0.02 parts of mercaptopropionic acid and 0.02 parts of octyl mercaptan to 4 parts of water to make material B, and add A and B materials dropwise to the above reaction kettle to control material A After 3 hours of dripping, material B was dripped in 3.5 hours. After the addition was completed, the material was matured for 1 hour. Add sodium hydroxide to the reaction kettle to adjust its pH to 5-7. Add 4 parts of sodium sulfate and 4 parts of ethyl acetoacetate to the reaction kettle, and wait until it is completely dissolved, add 40 parts of triisopropanolamine, 10 parts of triethanolamine and 5 parts of water to prepare an aluminum silicate particle modifier solution .

[0036] A...

Embodiment 2

[0038] First add 9 parts of methoxypolyethylene glycol acrylate and 17 parts of water into the reaction kettle, raise the temperature to 40 degrees, heat for 30 minutes, and then add 0.5 parts of hydrogen peroxide at one time. Add 1.8 parts of acrylic acid to 2 parts of water to make material A; add 0.015 parts of mercaptopropionic acid and 0.015 parts of octyl mercaptan to 4 parts of water to make material B, and add materials A and B dropwise to the above reaction kettle to control material A After 3 hours of dripping, material B was dripped in 3.5 hours. After the addition was completed, the material was matured for 1 hour. Add sodium hydroxide to the reaction kettle to adjust its pH to 5-7. Add 4.2 parts of sodium sulfate and 4.2 parts of ethyl acetoacetate into the reaction kettle, and wait until they are completely dissolved, then add 39 parts of triisopropanolamine, 11 parts of triethanolamine and 7 parts of water to obtain a uniform solution.

[0039] At 40-60°C, the ...

Embodiment 3

[0041] First add 8.5 parts of methoxypolyethylene glycol acrylate and 16 parts of water into the reaction kettle, raise the temperature to 40 degrees, heat for 30 minutes, and then add 0.4 parts of hydrogen peroxide at one time. Add 1.5 parts of acrylic acid to 2 parts of water to make material A; add 0.016 parts of mercaptopropionic acid and 0.016 parts of octyl mercaptan to 4 parts of water to make material B, and add materials A and B dropwise to the above reaction kettle to control material A After 3 hours of dripping, material B was dripped in 3.5 hours. After the addition was completed, the material was matured for 1 hour. Add sodium hydroxide to the reaction kettle to adjust its pH to 5-7. Add 4.3 parts of sodium sulfate and 4.3 parts of ethyl acetoacetate to the reaction kettle, and wait until they are completely dissolved, then add 38 parts of triisopropanolamine, 11 parts of triethanolamine and 9 parts of water to obtain a uniform solution.

[0042] At 40-60°C, the ...

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Abstract

The invention discloses modified aluminum-silicon particles and a modifier thereof. The modified is sprayed to the surface of aluminum-silicon particles by means of vapor deposition at 40-60 DEG C toprepare the modified aluminum-silicon particles. The modifier is prepared by: adding methoxy polyethylene glycol acrylate and water into a reactor, heating to 30-50 DEG C, and adding hydrogen peroxide; dropwise adding acrylic acid, thiohydracrylic acid and n-octyl mercaptan into the reactor, and curing after dropping; adding sodium hydroxide into the reactor, and adjusting pH to 5-7; continuing toadd sodium sulfate and ethyl acetoacetate, and adding triisopropanolamine, triethanolamine and water after full dissolution to obtain a modifier solution. The modified aluminum-silicon particles thatare superfine can be used in cement-based materials to significantly increase the curing rate of chloride ions, up to 50%, with less damage caused to reinforcement by the chloride ions; cement can bereplaced, so that early and later strengths are significantly improved, and the pore structure is optimized.

Description

technical field [0001] The invention belongs to the technical field of cement additives, and in particular relates to a modified aluminum siliceous particle and a modifier thereof. Background technique [0002] In recent years, the scope of construction of marine engineering has been continuously expanded, and the scope of use of raw materials such as sea sand has been continuously expanded. Reinforced concrete is vulnerable to huge damage in complex and diverse marine environments, especially chloride ions. Reinforced concrete structure projects constructed in coastal or offshore areas, After a certain period of time, chloride ions can penetrate into the surface of the steel bar, resulting in the destruction of the passivation film on the surface of the steel bar and corrosion of the steel bar. After the corrosion reaches a certain level, the volume of the steel bar expands, so structural concrete cracks along the bar are damaged, that is, the structure loses durability. No...

Claims

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Application Information

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IPC IPC(8): C04B20/10C04B22/08C04B103/61
CPCC04B20/1037C04B22/08C04B2103/61C04B20/1022
Inventor 马保国张挺谭洪波梅军鹏刘晓海姜文斌戚华辉
Owner WUHAN UNIV OF TECH
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