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High-performance polycarboxylate superplasticizer, preparation method thereof and concrete

A polycarboxylate, high-performance technology, applied in the field of materials, can solve the problems of poor economic benefits, high investment, complex production process of polycarboxylate water reducer, etc., achieve high water reduction rate, reduce side reactions, and safe reaction process The effect of environmental protection

Pending Publication Date: 2020-11-27
安徽海螺材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Another object of the present invention is to provide a preparation method of a high-performance polycarboxylate water reducer, a preparation method of a polycarboxylate water reducer that can be prepared at room temperature, and overcome the problem of polycarboxylate water reducer in the prior art heating synthesis technology. The production process of water preparation is relatively complicated, the investment is high, and the economic benefit is poor.

Method used

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  • High-performance polycarboxylate superplasticizer, preparation method thereof and concrete
  • High-performance polycarboxylate superplasticizer, preparation method thereof and concrete
  • High-performance polycarboxylate superplasticizer, preparation method thereof and concrete

Examples

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Effect test

Embodiment 1

[0038] A preparation method of high-performance polycarboxylate water reducer, comprising the following steps:

[0039] 1) Prepare A solution: dissolve 15g of acrylic acid, 5g of maleic anhydride and 1g of mercaptopropionic acid in 80g of demineralized water, mix well, and obtain A solution for later use;

[0040] 2) Prepare B solution: dissolve 1 g of ascorbic acid in 40 g of demineralized water, mix well to obtain B solution, and set aside;

[0041] 3) Add 150g of demineralized water into the four-necked flask, add 240g of ethylene glycol monovinyl polyglycol ether macromonomer with a molecular weight of 2400 under stirring, and obtain the base material after completely dissolving;

[0042] 4) Under agitation, add 2g of 30% hydrogen peroxide solution dropwise to the bottom material obtained in step 3), stir for 5 minutes and then drop 3g of FeSO with a mass fraction of 0.5% 4 aqueous solution, continue to stir for 5 minutes;

[0043] 5) Add solution A and solution B dropwi...

Embodiment 2

[0045] A preparation method of high-performance polycarboxylate water reducer, comprising the following steps:

[0046] 1) Prepare A solution: dissolve 20g of acrylic acid, 3g of maleic anhydride and 2g of mercaptopropionic acid in 60g of demineralized water, mix well, and obtain A solution for later use;

[0047] 2) Prepare B solution: dissolve 2.5g of ascorbic acid in 50g of demineralized water, mix well to obtain B solution, and set aside;

[0048] 3) Add 180g of demineralized water into the four-necked flask, add 220g of ethylene glycol monovinyl polyglycol ether macromonomer with a molecular weight of 2400 under stirring, and obtain the base material after completely dissolving;

[0049] 4) Under agitation, add 4g of 30% hydrogen peroxide solution dropwise to the base material obtained in step 3), stir for 5 minutes and then drop 5g of FeSO with a mass fraction of 1.0%. 4 aqueous solution, continue to stir for 5 minutes;

[0050] 5) Add solution A and solution B dropwis...

Embodiment 3

[0052] A preparation method of high-performance polycarboxylate water reducer, comprising the following steps:

[0053] 1) Prepare A solution: dissolve 30g of acrylic acid, 8g of maleic anhydride, and 3g of mercaptopropionic acid in 100g of demineralized water, mix well, and obtain A solution for later use;

[0054] 2) Prepare B solution: dissolve 3.5g of ascorbic acid in 60g of demineralized water, mix well to obtain B solution, and set aside;

[0055]3) Add 200g of demineralized water into the four-necked flask, add 280g of ethylene glycol monovinyl polyglycol ether macromonomer with a molecular weight of 2400 under stirring, and obtain the base material after completely dissolving;

[0056] 4) In the stirring state, drop 5g of 30% hydrogen peroxide solution into the bottom material obtained in step 3), and after stirring for 5min, add dropwise 7g of FeSO with a mass fraction of 1.2%. 4 aqueous solution, continue to stir for 5 minutes;

[0057] 5) Add solution A and soluti...

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Abstract

The invention provides a high-performance polycarboxylate superplasticizer, a preparation method thereof and concrete. The polycarboxylate is prepared from the following components: ethylene glycol monovinyl polyethylene glycol ether macromonomer, unsaturated carboxylic acid micromonomer, alkali, an oxidizing agent, a reducing agent, a chain transfer agent and a catalyst. Compared with the prior art, the polycarboxylate superplasticizer is synthesized at normal temperature, the reaction time is short, the synthesis process is simple, the investment is low, and the economic benefit is relatively good. The polycarboxylate superplasticizer prepared according to the preparation method not only has a better water reducing effect, but also is excellent in collapse resistance.

Description

technical field [0001] The invention belongs to the field of materials, and in particular relates to a high-performance polycarboxylate water reducer, a preparation method thereof, and concrete. Background technique [0002] With the rapid development of my country's economy and the improvement of construction level, the requirements for concrete quality are getting higher and higher. Polycarboxylate superplasticizer is the latest generation of concrete admixture with excellent water reducing rate and good cement adaptability. , At the same time, there is no technological waste water in the production process of polycarboxylate superplasticizer, which is a green and environmentally friendly material. Polycarboxylate superplasticizer has been widely used in high-performance concrete. [0003] In recent years, compared with ester polycarboxylates, ether polycarboxylate water reducers not only have the advantages of simple production process and high cost performance, but also h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F222/06C08F4/26C04B24/26C04B103/30
CPCC08F283/065C08F4/26C04B24/2694C04B2103/302C08F220/06C08F222/06
Inventor 姚杰许庚友陈烽曾君司宏振宋南京
Owner 安徽海螺材料科技股份有限公司
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