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A kind of strengthening modifier for concrete admixture and preparation method thereof

A technology of admixture and modifier, which is applied in the field of building materials to achieve the effect of realizing the activity of the admixture, enhancing the surface activity and enhancing the cementing ability

Active Publication Date: 2022-05-24
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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  • A kind of strengthening modifier for concrete admixture and preparation method thereof
  • A kind of strengthening modifier for concrete admixture and preparation method thereof
  • A kind of strengthening modifier for concrete admixture and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The first step, 15 parts of acrylic acid, take 30 parts of acrylamide, 30 parts of acrylenol, 1 part of ferrous sulfate, dissolve in 240 parts of water, stir evenly in the reactor, heat to 60 °C to obtain the base solution.

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

[0034] The third step, the A liquid in 120 minutes into the base liquid into the reactor at a uniform speed, during which the ultrasonic emulsifier work, keep the reactor continuously stirred, keep the reactor temperature not less than 60 °C, not higher than 75 °C.

[0035] The fourth step, after the completion of the drop-added continuous stirring until there is no longer a milky liquid in the reactor, stirring for at l...

Embodiment 2

[0038] The first step, acrylic acid 15 parts, take 35 parts of acrylamide, 30 parts of acrylate, 1 part of ferrous sulfate, dissolve in 240 parts of water, stir evenly in the reactor, heat to 60 °C to obtain the base solution.

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

[0040]The third step, the A liquid in 120 minutes into the base liquid into the reactor at a uniform speed, during which the ultrasonic emulsifier work, keep the reactor continuously stirred, keep the reactor temperature not less than 60 °C, not higher than 75 °C.

[0041] The fourth step, after the completion of the drop-added continuous stirring until there is no longer a milky liquid in the reactor, stirring for at least 6...

Embodiment 3

[0044] The first step, acrylic acid 15 parts, take 30 parts of acrylamide, 35 parts of acrylenol, 1 part of ferrous sulfate, dissolve in 240 parts of water, stir evenly in the reactor, heat to 60 °C to obtain the base solution.

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

[0046] The third step, the A liquid in 120 minutes into the base liquid into the reactor at a uniform speed, during which the ultrasonic emulsifier work, keep the reactor continuously stirred, keep the reactor temperature not less than 60 °C, not higher than 75 °C.

[0047] The fourth step, after the completion of the drop-added continuous stirring until there is no longer a milky liquid in the reactor, stirring for at leas...

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Abstract

The invention provides a strengthening modifier for concrete admixture and a preparation method thereof. The preparation method mainly uses acrylamide, acryl alcohol, acrylic acid, allyl (diisopropylamino) dihydrosilane, A functional monomer forms a copolymer solution through emulsion polymerization under ultrasonic emulsification under a redox initiation system, and then adds two auxiliary agents, sodium metasilicate and tetrasodium ethylenediaminetetraacetic acid, into the copolymer solution. After stirring and dissolving, the reinforcing modifier for the concrete admixture is obtained. The present invention can increase the hydration limit of the admixture, increase the hydration speed, and at the same time strengthen the ability of the inactive admixture to be cemented, and promote the cement hydration product, such as C-S-H gel fully covering the admixture The surface and internal pores of the composite.

Description

Technical field [0001] The present invention relates to the technical field of building materials, in particular, to a concrete admixture for reinforcing modifiers and preparation methods thereof. Background [0002] Concrete admixtures are used as cementitious materials in concrete. At present, the concrete admixture commonly used in commercial concrete is fly ash, mineral powder, limestone powder, and steel slag powder. The nature of these admixtures themselves in concrete determines that they can account for no more than 45% of the total amount of cementitious materials, and the amount of single admixtures generally does not exceed 30%, and even limestone powder, which is considered to be an admixture without cementation activity, is strictly limited to less than 20%. The root cause of the above restriction is due to insufficient activity of the admixture. According to the definition of the national standard, the activity of the admixture is stipulated as the ratio of the stre...

Claims

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Application Information

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Patent Type & Authority Patents(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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