Polycarboxylic acid high-slump-retaining zero-bleeding high-performance water reducing agent

A technology of polycarboxylic acid series and water reducing agent, which is applied in the fields of high performance concrete, ultra-high strength concrete, self-compacting concrete, polycarboxylic acid series high performance water reducing agent with high slump retention and zero bleeding, and can solve the problems of low energy consumption and so on. , to achieve the effect of improving later strength, improving workability, and high water reduction rate

Inactive Publication Date: 2013-03-20
上海华联建筑外加剂厂有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production process is simple, pollution-free, and low energy consumption

Method used

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  • Polycarboxylic acid high-slump-retaining zero-bleeding high-performance water reducing agent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Example 1: Add 1.9kg of deionized water with the above composition and ratio into the reaction pot and raise the temperature to 30°C-50°C, add 60kg of polycarboxylate water reducer, and add 35kg of polycarboxylate ether type water reducer , keep the temperature, add 1.0kg of sodium gluconate and 1.5kg of sodium lignosulfonate as activators, and stir for 30 minutes to form a synthetic product with a specific structure. After cooling to normal temperature, add 0.3kg of ion-exchange membrane alkali to adjust the pH, add 0.3kg of anti-corrosion, anti-mildew and fungicide and continue to stir for 30 minutes, which is the finished product.

Embodiment 2

[0018] Example 2: Add 1.6kg of deionized water with the above composition and ratio into the reaction pot and raise the temperature to 30°C-50°C, add 60kg of polycarboxylate water reducer, and add 35kg of polycarboxylate water reducer , keep the temperature, add 2.0kg of sodium gluconate and 0.5kg of sodium lignosulfonate as activators, and stir for 30 minutes to form a synthetic product with a specific structure. After cooling to normal temperature, add 0.5kg of ion-exchange membrane alkali to adjust the pH, add 0.4kg of anti-corrosion, anti-mildew and fungicide, and continue stirring for 30 minutes to obtain the finished product.

Embodiment 3

[0019] Example 3: Add 1.8kg of deionized water with the above composition and ratio into the reaction pot and raise the temperature to 30°C-50°C, add 70kg of polycarboxylate water reducer, and add 25kg of polycarboxylate ether type water reducer , keep the temperature, add 1.5kg of sodium gluconate and 1.0kg of sodium lignosulfonate as activators, and stir for 30 minutes to form a synthetic product with a specific structure. After cooling to normal temperature, add 0.4kg of ion-exchange membrane alkali to adjust the pH, add 0.3kg of anti-corrosion, anti-mildew and fungicide, and continue stirring for 30 minutes to obtain the finished product.

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Abstract

The invention relates to a polycarboxylic acid high-slump-retaining zero-bleeding high-performance water reducing agent. The polycarboxylic acid high-slump-retaining zero-bleeding high-performance water reducing agent comprises the following components in percentage by weight: 60.0 to 80.0 percent of polycarboxylic acid ester additive with solid content of 20 percent, 15.0 to 35.0 percent of polycarboxylic acid ether additive with solid content of 20 percent, 1.0 to 2.5 percent of sodium gluconate (polyhydroxy carboxylate), 0.5 to 1.5 percent of sodium lignin sulfonate (lignosulfonate), 0.2 to 0.5 percent of ionic membrane caustic soda, 0.2 to 0.5 percent of isothiazolinone antiseptic and mould proof bactericide, and 1.0 to 3.0 percent of deionized water; a preparation method comprises the following steps of: performing chemical combination on the polycarboxylic acid ester additive, the polycarboxylic acid ether additive, and the deionized water in the ratio at the temperature of between 30 and 50 DEG C; keeping the temperature, and adding polyhydroxy carboxylate, lignosulfonate and other exciting agents to form the synthetic product with a specific structure; and cooling to normal temperature, adding the ionic membrane caustic soda to regulate the pH value, and adding the isothiazolinone antiseptic and mould proof bactericide to form the final product. The polycarboxylic acid high slump retaining zero-bleeding high-performance water reducing agent has low doped content, high water reducing ratio, wide cement application range, and high slump retaining capacity, is zero-bleeding and is suitable for cement with different labels.

Description

technical field [0001] The invention relates to a polycarboxylic acid-based high-slump and zero-bleeding high-performance water reducer, which belongs to the field of new material science and is especially suitable for self-compacting concrete, high-performance concrete, ultra-high-strength concrete and the like. Background technique [0002] In recent years, with the rise of national key high-speed rail projects, the application range of polycarboxylate water reducers has become wider and wider, and the scope of engineering has gradually expanded to the field of ordinary civil buildings. The polycarboxylate admixture is obviously different from the traditional lignosulfonate, naphthalene, sulfamate, melamine and other water reducing agents. Good, no pollution to the environment and so on. However, with the expansion of the scope of use, its own inherent shortcomings are gradually exposed, especially after the promulgation and implementation of the new national standard GB1...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/18C04B24/08C04B103/30
Inventor 何仙琴郭执宝顾艳张如勤
Owner 上海华联建筑外加剂厂有限公司
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