High-efficiency water reducing agent and preparation method thereof

A high-efficiency water reducer and initiator technology, applied in the field of water reducer, can solve the problems of low compressive strength and low concrete fluidity retention rate, and achieve good compressive strength, good slump retention, and good lubrication Effect

Inactive Publication Date: 2020-10-13
江苏连外实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, high-efficiency water-reducing agents are produced and used in large quantities in China. Although they have the advantages of high water-reducing rate, easy-to-obtain raw materials, and low prices, they have the disadvantages of low retention rate of concrete fluidity and low compressive strength after mixing. question

Method used

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  • High-efficiency water reducing agent and preparation method thereof
  • High-efficiency water reducing agent and preparation method thereof
  • High-efficiency water reducing agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A high-efficiency water reducer comprising the following components in parts by weight,

[0026]

[0027]

[0028] The preparation method is as follows: S1) inject deionized bottom water into the reaction kettle, add isopentenyl polyoxyethylene ether, and stir for 30 minutes; S2) prepare material A and material B: wherein material A is acrylic acid, acrylamide, 2 -Acrylamide-2-methylpropanesulfonic acid and deionized water, B material is reduced initiator VC, chain transfer agent mercaptoacetic acid and deionized water; S3) Add oxidized initiator hydrogen peroxide in the reaction kettle, and then start dripping Add material A and material B, dropwise adding time is 2.3h, keep moist for 2h after dropping, make up the total weight of deionized water.

Embodiment 2

[0030] A high-efficiency water reducer comprising the following components in parts by weight,

[0031]

[0032] The preparation method is as follows: S1) inject deionized bottom water into the reaction kettle, add isopentenyl polyoxyethylene ether, and stir for 30 minutes; S2) prepare material A and material B: wherein material A is acrylic acid, 2-acrylamide -2-Methylpropanesulfonic acid and deionized water, B material is reduced initiator VC, chain transfer agent mercaptoethanol and deionized water; S3) Add oxidized initiator hydrogen peroxide to the reaction kettle, and then start to drop A material And material B, the dropping time is 2 hours, after the dropping is completed, moisturize for 2 hours, and make up the total weight of deionized water.

Embodiment 3

[0034] A high-efficiency water reducer comprising the following components in parts by weight,

[0035]

[0036] The preparation method is as follows: S1) inject deionized bottom water into the reaction kettle, add methallyl polyoxyethylene ether, and stir for 30 minutes; S2) prepare material A and material B: wherein material A is acrylic acid, 2-propylene Amide-2-methylpropanesulfonic acid and deionized water, B material is reduced initiator VC, chain transfer agent sodium hypophosphite and deionized water; S3) Add oxidized initiator hydrogen peroxide in the reaction kettle, and then start dripping Add material A and material B, dropwise adding time is 2.5h, keep moist for 2h after dropping, make up the total weight of deionized water.

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PUM

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Abstract

The invention discloses a high-efficiency water reducing agent and a preparation method thereof. The efficient water reducing agent is prepared from the following components in parts by weight: 20 to40 parts of macromonomer, 2 to 10 parts of acrylic acid, 0.5 to 5 parts of acrylamide monomer, 0.05 to 1 part of oxidation type initiator, 0.05 to 1 part of reduction type initiator, 0.1 to 1 part ofchain transfer agent and 50 to 80 parts of deionized water; the polyether group of the high-efficiency water reducing agent can generate a steric hindrance effect among cement particles, so that the slump of concrete is kept good and the concrete has good compressive strength; meanwhile, a large number of-CN-bonds are introduced, hydrophilic groups in the water reducing agent are improved, a waterfilm is formed, a very good lubricating effect is achieved, the sliding resistance among cement particles can be effectively reduced, and therefore the fluidity of the concrete is further improved.

Description

technical field [0001] The invention relates to the technical field of water reducers, in particular to a high-efficiency water reducer and a preparation method thereof. Background technique [0002] Water reducer is a concrete admixture that can reduce the amount of mixing water while maintaining the slump of concrete. Most of them are anionic surfactants, such as lignosulfonate, naphthalenesulfonate formaldehyde polymer, etc. After being added to the concrete mixture, it can disperse the cement particles, improve its workability, reduce the unit water consumption, improve the fluidity of the concrete mixture; or reduce the unit cement consumption and save cement. [0003] At present, high-efficiency water-reducing agents are produced and used in large quantities in China. Although they have the advantages of high water-reducing rate, easy-to-obtain raw materials, and low prices, they have the disadvantages of low retention rate of concrete fluidity and low compressive str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F220/56C08F220/58C04B24/16C04B103/30
CPCC08F283/065C04B24/165C04B2103/302
Inventor 龚丹丹吴洋
Owner 江苏连外实业有限公司
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