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Polycarboxylate-type high-performance water reducing agent and preparation method thereof

A polycarboxylate-based, high-performance technology, applied in the field of building materials, can solve problems such as insufficient effects and increased costs, achieve significant economic and social benefits, reduce water-cement ratio, and slow down the hydration speed

Active Publication Date: 2020-10-27
RIZHAO FEM NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods can achieve the goal, but the effect is not significant enough, resulting in increased costs

Method used

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  • Polycarboxylate-type high-performance water reducing agent and preparation method thereof
  • Polycarboxylate-type high-performance water reducing agent and preparation method thereof
  • Polycarboxylate-type high-performance water reducing agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A polycarboxylic acid-based high-performance water reducer, which is composed of a first component and a second component with a mass ratio of 1:0.5, and the first component is prepared from the following raw materials in parts by weight: no 100 parts of saturated polyoxyethylene ether, 80 parts of methyl acrylate, 10 parts of acrylic acid, 10 parts of oxidizing agent, 1.5 parts of chain transfer agent, 10 parts of reducing agent, 3 parts of liquid caustic soda and 60 parts of deionized water;

[0028] The second component is prepared from the following raw materials in parts by weight: 5 parts of sodium lignosulfonate, 8 parts of diethanol monoisopropanolamine, and 1 part of starch-based hydrogel.

[0029] The starch-based hydrogel is prepared by the following method: weigh 20.0g cornstarch, and form a starch emulsion with a solid content of 5% in a mixed solvent of deionized water and ethanol at a volume ratio of 5:1, and The starch emulsion was heated to 75°C for 30 ...

Embodiment 2

[0042] A polycarboxylic acid-based high-performance water reducer, which is composed of a first component and a second component with a mass ratio of 1:0.5, and the first component is prepared from the following raw materials in parts by weight: no 150 parts of saturated polyoxyethylene ether, 90 parts of methyl acrylate, 20 parts of acrylic acid, 15 parts of oxidizing agent, 2 parts of chain transfer agent, 15 parts of reducing agent, 4 parts of liquid caustic soda and 75 parts of deionized water;

[0043] The second component is prepared from the following raw materials in parts by weight: 8 parts of sodium lignosulfonate, 9 parts of diethanol monoisopropanolamine, and 3 parts of starch-based hydrogel.

[0044] The starch-based hydrogel is prepared by the following method: weigh 20.0g cornstarch, and form a starch emulsion with a solid content of 8% in a mixed solvent of deionized water and ethanol at a volume ratio of 8:1, and The starch emulsion was heated up to 75°C for 7...

Embodiment 3

[0057] A polycarboxylic acid-based high-performance water reducer, which is composed of a first component and a second component with a mass ratio of 1:0.5, and the first component is prepared from the following raw materials in parts by weight: no 200 parts of saturated polyoxyethylene ether, 100 parts of methyl acrylate, 30 parts of acrylic acid, 20 parts of oxidizing agent, 2.5 parts of chain transfer agent, 20 parts of reducing agent, 5 parts of liquid caustic soda and 90 parts of deionized water;

[0058] The second component is prepared from the following raw materials in parts by weight: 10 parts of sodium lignosulfonate, 10 parts of diethanol monoisopropanolamine, and 5 parts of starch-based hydrogel.

[0059] The starch-based hydrogel is prepared by the following method: weigh 20.0g cornstarch, and form a starch emulsion with a solid content of 10% in a mixed solvent of deionized water and ethanol at a volume ratio of 10:1, and The starch emulsion was heated to 75°C f...

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Abstract

The invention discloses a polycarboxylate-type high-performance water reducing agent and a preparation method thereof, and belongs to the technical field of building materials. The water reducing agent is composed of a first component and a second component in a mass ratio of 1: 0.5, wherein the first component is prepared from unsaturated polyoxyethylene ether, methyl acrylate, acrylic acid, an oxidant, a chain transfer agent, a reducing agent, liquid caustic soda and deionized water as raw materials; and the second component is prepared from the following raw materials: sodium lignin sulfonate, diethanolisopropanolamine and starch hydrogel. The raw materials are scientific in proportion and have a synergistic effect, the compatibility of all the components is good, and it can be guaranteed that storage is uniform and stable for a long time; the shrinkage rate is low, and the durability of concrete is effectively improved; the water reducing rate is high, the water-cement ratio can begreatly reduced, and the concrete strength is ensured; the slump retaining effect is good, and the concrete construction performance is well met; the doping amount is low, remarkable economic and social benefits are achieved, and the method is suitable for large-scale production.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a polycarboxylic acid-based high-performance water reducer and a preparation method thereof. Background technique [0002] Polycarboxylate superplasticizer is the third-generation superplasticizer with excellent comprehensive performance. It has been produced and applied in Japan, Germany, the United States and other developed countries since the late 1980s. It has many advantages such as high water-reducing rate, small loss of concrete slump over time, low dosage, great contribution to concrete strength, and good environmental protection. Station, many domestic application companies began to choose polycarboxylate superplasticizer as the fifth essential component of concrete. However, due to the relatively short application and development time of polycarboxylic acid-based high-performance water-reducers in my country, its application technology research ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C08F283/06C08F220/14C08F220/06C04B103/30
CPCC04B40/0039C08F283/065C04B2103/302C08F220/14C08F220/06C04B24/32C04B24/38C04B24/18C04B24/122
Inventor 肖维录井富磊张成强
Owner RIZHAO FEM NEW MATERIAL TECH
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