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Clay-resisting slow-release slump-retaining type polycarboxylate superplasticizer and preparation method thereof

A slump-preserving polycarboxylate technology, applied in the field of concrete admixtures, can solve problems such as high mud content in sand and gravel, poor adaptability of polycarboxylate water-reducers, and large loss of concrete slump. Good anti-mud effect, low cost effect

Inactive Publication Date: 2019-04-16
山西黄河新型化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies in the prior art, the present invention provides a mud-resistant, slow-release and slump-preserving polycarboxylate superplasticizer with strong adaptability to sand and gravel aggregates, good slump-retaining performance, simple process, and low cost. The invention and its preparation method solve the problems of high mud content in existing sand and gravel, poor adaptability of polycarboxylate superplasticizer, and large loss of concrete slump

Method used

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  • Clay-resisting slow-release slump-retaining type polycarboxylate superplasticizer and preparation method thereof
  • Clay-resisting slow-release slump-retaining type polycarboxylate superplasticizer and preparation method thereof
  • Clay-resisting slow-release slump-retaining type polycarboxylate superplasticizer and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A mud-resistant, slow-release and slump-preserving polycarboxylate water reducer, which is prepared from primer, liquid A, liquid B and neutralizing liquid through copolymerization and neutralization reactions;

[0031] The base material is composed of the following raw materials in parts by weight: 340.0 parts of prenol polyoxyethylene ether, 3.0 parts of maleic anhydride, 3.0 parts of sodium hypophosphite, 2.4 parts of hydrogen peroxide, and 200.0 parts of water;

[0032] The liquid A is composed of the following raw materials in parts by weight: 0.5 parts of ascorbic acid, 1.8 parts of mercaptopropionic acid, and 120.0 parts of water;

[0033] The B liquid is composed of the following raw materials in parts by weight: 15.0 parts of acrylic acid, 25.0 parts of methyl acrylate, 3.0 parts of polyethylene glycol diacrylate, 5.0 parts of acrylamide, 6.0 parts of 2-hydroxyethyl methacrylate phosphate, 80.0 parts of water;

[0034] The neutralization solution is composed o...

Embodiment 2

[0044] A mud-resistant, slow-release and slump-preserving polycarboxylate water reducer, which is prepared from primer, liquid A, liquid B and neutralizing liquid through copolymerization and neutralization reactions;

[0045] The base material is composed of the following raw materials in parts by weight: 360.0 parts of isopentenol polyoxyethylene ether, 5.0 parts of itaconic anhydride, 4.0 parts of sodium hypophosphite, 4.0 parts of ammonium persulfate, and 200 parts of water;

[0046] The A liquid is composed of the following raw materials in parts by weight: 0.7 parts of ascorbic acid, 1.5 parts of thioglycolic acid, and 120 parts of water;

[0047] The B liquid is composed of the following raw materials in parts by weight: 18.0 parts of acrylic acid, 26.0 parts of hydroxyethyl acrylate, 4.0 parts of polyethylene glycol dimethacrylate, 7.0 parts of 2-acrylamide-2-methylpropanesulfonic acid, 1 - 8.0 parts of hydroxyethyl methacrylate phosphate, 80 parts of water;

[0048] ...

Embodiment 3

[0058] A mud-resistant, slow-release and slump-preserving polycarboxylate water reducer, which is prepared from primer, liquid A, liquid B and neutralizing liquid through copolymerization and neutralization reactions;

[0059] The base material is composed of the following raw materials in parts by weight: 350.0 parts of methallyl alcohol polyoxyethylene ether, 6.0 parts of maleic anhydride, 4.0 parts of sodium hypophosphite, 3.0 parts of hydrogen peroxide, and 200.0 parts of water;

[0060] The A liquid is composed of the following raw materials in parts by weight: 1.0 parts of diaobai block, 2.0 parts of mercaptopropionic acid, and 120.0 parts of water;

[0061] The B liquid is composed of the following raw materials in parts by weight: 24.0 parts of methacrylic acid, 22.0 parts of hydroxypropyl acrylate, 6.0 parts of polyethylene glycol diacrylate, 8.0 parts of acrylamide, 2-hydroxyethyl methacrylate phosphate 9.0 parts, water 80.0 parts;

[0062] The neutralization soluti...

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Abstract

The invention relates to the technical field of concrete admixtures, in particular to a clay-resisting slow-release slump-retaining type polycarboxylate superplasticizer and a preparation method thereof. With polyether macromonomers, unsaturated carboxylic acid, unsaturated carboxylic ester, dibasic acid anhydride, a crosslinking agent, amide monomers, unsaturated phosphate ester, phosphate, an oxidizing agent , a reducing agent, a chain transfer agent, a neutralizing agent and water as raw materials, the clay-resisting slow-release slump-retaining type polycarboxylate superplasticizer is synthesized at normal temperature. Ester groups, amide groups and phosphate ester are introduced into the molecular structure of the polycarboxylate superplasticizer, and light crosslinking of the polycarboxylate superplasticizer is realized through the long-chain ester crosslinking agent, so that the superplasticizer has a good clay-resisting and slump-retaining effect and has the advantages of low mixing amount, high water reducing rate, high adaptability to clay-containing sand, good slump retaining performance and the like; besides, only normal-temperature polymerization is needed, the processis simple, the production cost is low, and the superplasticizer is suitable for industrial production.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, more specifically, to a mud-resistant, slow-release and slump-preserving polycarboxylate water reducer and a preparation method thereof. Background technique [0002] In recent years, polycarboxylate superplasticizer has been widely used. Its high water reducing rate, high cost performance, excellent slump retention performance, and good construction performance of the mixture have been widely used in engineering applications in recent years. recognized. However, a large number of engineering practices have proved that polycarboxylate superplasticizers are sensitive to the mud content in sand and gravel. If the mud content changes slightly, the slump loss of the concrete mixture will be significantly increased, and the work performance will be seriously reduced. The mechanical properties of concrete decline in the later stage. [0003] With the massive exploitation of natural sand a...

Claims

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Application Information

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IPC IPC(8): C04B24/24C04B24/16C08F220/28C08F220/06C08F222/04C08F222/06C08F220/20C08F222/14C08F220/58C08F230/02C08F220/56C08F222/26C08F222/02C04B103/30
CPCC04B24/165C04B24/246C08F220/28C04B2103/302C08F220/286C08F220/06C08F222/04C08F220/20C08F222/102C08F220/585C08F230/02C08F222/06C08F220/14C08F220/56C08F222/26
Inventor 曾文波蔡泉郭忠义曲启恒吕晓辉高素静卞君
Owner 山西黄河新型化工有限公司
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