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Early-strength high-performance polycarboxylic acid water reducer and preparation method thereof

A water-reducing agent, high-performance technology, applied in the field of early-strength high-performance polycarboxylate water-reducer and its preparation, can solve the problem of poor comprehensive performance, initial setting time and final setting of early-strength polycarboxylate water-reducing agent Long time, unable to meet the use requirements and other problems, to achieve the effect of improving the wrapping performance, excellent antifreeze effect, suitable for large-scale production

Inactive Publication Date: 2017-11-03
RIZHAO FEM NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the comprehensive performance of early-strength polycarboxylate superplasticizers is poor, such as high air content, long initial setting time and final setting time, etc., which cannot meet the requirements of some special occasions.

Method used

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  • Early-strength high-performance polycarboxylic acid water reducer and preparation method thereof
  • Early-strength high-performance polycarboxylic acid water reducer and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] An early-strength high-performance polycarboxylate water reducer is prepared from the following raw materials in parts by weight: 100 parts of polycarboxylate water reducer, 15 parts of retarder, diethanol monoisopropanolamine maleate 12 parts of ester compound, 8 parts of diethanol monoisopropanolamine, 12 parts of sodium lignosulfonate, 3 parts of 2-ethyl-4-methylimidazole, 1.5 parts of tetradecyltrimethylammonium bromide, 10 parts of sodium metasilicate pentahydrate, 250 parts of water.

[0023] Described, retarder is sodium gluconate.

[0024] As mentioned, the solid content of the polycarboxylate water reducer is 40%.

[0025] Described, diethanol monoisopropanolamine maleate compound is made by following method: add diethanol monoisopropanolamine and maleic anhydride in reactor, add catalyzer, depressurize to 0.4MPa, heating, the temperature is controlled at 95°C, the system is kept at a constant temperature, and the acidity of the system is measured every 1h, a...

Embodiment 2

[0032] An early-strength high-performance polycarboxylate water reducer is prepared from the following raw materials in parts by weight: 100 parts of polycarboxylate water reducer, 13 parts of retarder, diethanol monoisopropanolamine maleate 14 parts of ester compound, 9 parts of diethanol monoisopropanolamine, 10 parts of sodium lignosulfonate, 4 parts of 2-ethyl-4-methylimidazole, 1 part of tetradecyltrimethylammonium bromide, 15 parts of sodium metasilicate pentahydrate, 350 parts of water.

[0033] Described, retarder is sodium hexametaphosphate.

[0034] As mentioned, the solid content of the polycarboxylate water reducer is 40%.

[0035] Described, diethanol monoisopropanolamine maleate compound is made by following method: add diethanol monoisopropanolamine and maleic anhydride in reactor, add catalyzer, depressurize to 0.4MPa, heating, the temperature is controlled at 95°C, the system is kept at a constant temperature, and the acidity of the system is measured every ...

Embodiment 3

[0042] An early-strength high-performance polycarboxylate water reducer is prepared from the following raw materials in parts by weight: 100 parts of polycarboxylate water reducer, 10 parts of retarder, diethanol monoisopropanolamine maleate 16 parts of ester compound, 10 parts of diethanol monoisopropanolamine, 8 parts of sodium lignosulfonate, 5 parts of 2-ethyl-4-methylimidazole, 0.5 parts of tetradecyltrimethylammonium bromide, 20 parts of sodium metasilicate pentahydrate, 450 parts of water.

[0043] Described, retarder is sodium tripolyphosphate.

[0044] As mentioned, the solid content of the polycarboxylate water reducer is 40%.

[0045] Described, diethanol monoisopropanolamine maleate compound is made by following method: add diethanol monoisopropanolamine and maleic anhydride in reactor, add catalyzer, depressurize to 0.4MPa, heating, the temperature is controlled at 95°C, the system is kept at a constant temperature, and the acidity of the system is measured ever...

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Abstract

The invention discloses an early-strength high-performance polycarboxylic acid water reducer and a preparation method thereof. The early-strength high-performance polycarboxylic acid water reducer is prepared from the following raw materials in parts by weight: 100 parts of polycarboxylic acid water reducer, 10-15 parts of a retarder, 12-16 parts of a diethanolisopropanolamine maleate compound, 8-10 parts of diethanolisopropanolamine, 8-12 parts of sodium lignosulfonate, 3-5 parts of 2-ethyl-4-methylimidazol, 0.5-1.5 parts of tetradecyl trimethyl ammonium bromide, 10-20 parts of sodium metasilicate pentahydrate, and 250-450 parts of water. The early-strength high-performance polycarboxylic acid water reducer prepared by the method disclosed by the invention has excellent properties of low applicable temperature, good compatibility among components, no chloride ions, low shrinkage ratio, high water-reducing rate, good slump retaining effect, and low mixing amount.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to an early-strength high-performance polycarboxylate 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 is sti...

Claims

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Application Information

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IPC IPC(8): C04B24/24C04B103/30
CPCC04B40/0039C04B2103/302C04B24/10C04B24/122C04B24/18C04B24/005C04B12/04C04B24/128C04B22/16
Inventor 肖维录
Owner RIZHAO FEM NEW MATERIAL TECH
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