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Reinforced modifier for concrete admixture and preparation method thereof

A technology of admixtures and modifiers, which is applied in the field of building materials to achieve the effect of realizing the activity of admixtures, improving surface activity, and improving cementing ability

Active Publication Date: 2022-04-22
湖南凝英新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it cannot change the problem of insufficient hydration capacity of the admixture. At 90 days, the difference in strength growth of the mortar is worse than that of the admixture without grinding aids.

Method used

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  • Reinforced modifier for concrete admixture and preparation method thereof
  • Reinforced modifier for concrete admixture and preparation method thereof
  • Reinforced modifier for concrete admixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] In the first step, 15 parts of acrylic acid, 30 parts of acrylamide, 30 parts of acryl alcohol and 1 part of ferrous sulfate are dissolved in 240 parts of water, stirred evenly in the reactor, and heated to 60°C to obtain the base liquid.

[0033] In the second step, take 10 parts of ADDS, 0.2 parts of mercaptoethanol, 1 part of ammonium persulfate, and 50 parts of water, stir and mix them, and use a ultrasonic emulsifier to emulsify, and obtain A emulsion after emulsification. Keep the phacoemulsifier working throughout the production to maintain the emulsified state.

[0034] The third step is to drop liquid A into the base liquid into the reactor at a constant speed within 120 minutes. During this period, keep the ultrasonic emulsifier working, keep stirring in the reactor, and keep the temperature in the reactor not lower than 60°C and not higher than 75°C. ℃.

[0035]The fourth step, after the dropwise addition is completed, continue to stir until there is no more...

Embodiment 2

[0038] In the first step, 15 parts of acrylic acid, 35 parts of acrylamide, 30 parts of acryl alcohol and 1 part of ferrous sulfate are dissolved in 240 parts of water, stirred evenly in the reactor, and heated to 60°C to obtain the base liquid.

[0039] In the second step, take 5 parts of ADDS, 0.2 parts of mercaptoethanol, 1 part of ammonium persulfate, and 50 parts of water, stir and mix them, and use a ultrasonic emulsifier to emulsify to obtain A emulsion after emulsification. Keep the phacoemulsifier working throughout the production to maintain the emulsified state.

[0040] The third step is to drop liquid A into the base liquid into the reactor at a constant speed within 120 minutes. During this period, keep the ultrasonic emulsifier working, keep stirring in the reactor, and keep the temperature in the reactor not lower than 60°C and not higher than 75°C. ℃.

[0041] The fourth step, after the dropwise addition is completed, continue to stir until there is no more m...

Embodiment 3

[0044] In the first step, 15 parts of acrylic acid, 30 parts of acrylamide, 35 parts of acryl alcohol and 1 part of ferrous sulfate are dissolved in 240 parts of water, stirred evenly in the reactor, and heated to 60°C to obtain the base liquid.

[0045] In the second step, take 15 parts of ADDS, 0.2 parts of mercaptoethanol, 1 part of ammonium persulfate, and 50 parts of water, stir and mix them, and use a ultrasonic emulsifier to emulsify, and obtain A emulsion after emulsification. Keep the phacoemulsifier working throughout the production to maintain the emulsified state.

[0046] The third step is to drop liquid A into the base liquid into the reactor at a constant speed within 120 minutes. During this period, keep the ultrasonic emulsifier working, keep stirring in the reactor, and keep the temperature in the reactor not lower than 60°C and not higher than 75°C. ℃.

[0047] The fourth step, after the dropwise addition is completed, continue to stir until there is no mor...

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Abstract

The invention provides a reinforced modifier for a concrete admixture and a preparation method of the reinforced modifier, and the preparation method mainly comprises the following steps: carrying out emulsion polymerization on four functional monomers including acrylamide, allyl alcohol, acrylic acid and allyl (diisopropylamino) dihydrosilane in a redox initiation system under ultrasonic emulsification to form a copolymer solution; and then adding two auxiliary agents, namely sodium metasilicate and ethylenediamine tetraacetic acid tetrasodium salt, into the copolymer solution, stirring and dissolving to obtain the reinforced modifier for the concrete admixture. According to the present invention, the hydration limit of the admixture can be improved, the hydration speed can be increased, the cementation ability of the non-active admixture by the cement can be enhanced, and the cement hydration products such as C-S-H gel can be promoted to completely cover the surface and the internal pores of the admixture.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a strengthening modifier for concrete admixture and a preparation method thereof. Background technique [0002] Concrete admixtures are used as cementitious materials in concrete. At present, the concrete admixtures commonly used in commercial concrete include fly ash, slag powder, limestone powder, and steel slag powder. The nature of these admixtures in concrete determines that they can account for no more than 45% of the total amount of cementitious materials, and the amount of a single admixture generally does not exceed 30%, even limestone powder, which is considered to be unsuitable. The amount of admixtures with cementitious activity is strictly limited within 20%. The root cause of the above limitation is because of insufficient activity of the admixture. According to the definition of the national standard, the activity of the admixture is defined as the ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/26C08F220/56C08F220/06C08F216/08C08F230/08
CPCC04B40/0039C04B24/2688C08F216/08C08F220/56C04B12/04C04B24/123C08F220/06C08F230/085
Inventor 李镓睿张祖华甄彧郑伟周恩涛徐威武
Owner 湖南凝英新材料科技有限公司
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