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Concrete water-retention anti-segregation agent and preparation method thereof

An anti-segregation agent and concrete technology, applied in the field of concrete admixtures, can solve problems such as use restrictions, and achieve the effects of improving workability, avoiding mildew and compatibility, and being easy to popularize in large areas.

Active Publication Date: 2016-06-15
厦门路桥翔通建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above-mentioned biological products have certain problems such as dissolution and storage stability, which greatly restrict their use

Method used

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  • Concrete water-retention anti-segregation agent and preparation method thereof
  • Concrete water-retention anti-segregation agent and preparation method thereof
  • Concrete water-retention anti-segregation agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: Preparation of concrete water-retaining anti-segregation agent

[0024] Add 300 parts of TPEG, 100 parts of acrylamide, 5 parts of vinyltrimethylsilane and 1250 parts of deionized water into the reactor. After stirring for 10 minutes, 4.3 parts of potassium persulfate were added in one go. Then, under the condition of constant stirring, a mixed solution of 3 parts of sodium hydrogen sulfoxylate formaldehyde, 1.5 parts of tertiary dodecylmercaptan and 250 parts of deionized water was added dropwise, and the dripping was completed within 1 to 4 hours. After dripping, stir for another 1-3 hours, then add liquid caustic soda into the reaction kettle, adjust the final pH to 6-10, and obtain the water-retaining anti-segregation agent. Record the sample as Z-1.

Embodiment 2

[0025] Example 2: Preparation of concrete water retention and anti-segregation agent

[0026] Add 300 parts of TPEG, 100 parts of acrylamide, 12.5 parts of γ-methacryloxypropyltrimethoxysilane and 1500 parts of deionized water into the reaction kettle. After stirring for 10 minutes, 3.6 parts of ammonium persulfate were added in one go. Then, under the condition of constant stirring, a mixed solution of 1 part of ascorbic acid, 1 part of thioglycolic acid and 300 parts of deionized water was added dropwise, and the drop was completed within 1 to 4 hours. After dripping, stir for another 1-3 hours, then add liquid caustic soda into the reaction kettle, adjust the final pH to 6-10, and obtain the water-retaining anti-segregation agent. Record the sample as Z-2.

Embodiment 3

[0027] Example 3: Preparation of concrete water retention and anti-segregation agent

[0028] 130.4 parts of TPEG, 78 parts of acrylamide, 3.9 parts of γ-methacryloxypropyltrimethoxysilane and 1800 parts of deionized water were added to the reaction kettle. After stirring for 10 minutes, 3 parts of ammonium persulfate were added in one go. Then, under the condition of constant stirring, a mixed solution of 2.6 parts of sodium bisulfite formaldehyde, 22 parts of acrylic acid, 1.5 parts of octyl mercaptan and 360 parts of deionized water was added dropwise, and the dripping was completed within 1 to 4 hours. After dripping, stir for another 1-3 hours, then add liquid caustic soda into the reaction kettle, adjust the final pH to 6-10, and obtain the water-retaining anti-segregation agent. Record the sample as Z-3.

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PUM

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Abstract

The invention discloses a concrete water-retention anti-segregation agent and its preparation method. The concrete water-retention anti-segregation agent is prepared from, by weight, 100 parts of a propenyl monomer, 104.8-300 parts of TPEG, 3.8-12.5 parts of an organosilicone monomer, 0.5-1.5 parts of a chain transfer agent, 2.9-4.3 parts of an oxidizing agent, 1-3 parts of a reducing agent, 1450-2457 parts of deionized water and liquid alkali for adjusting pH to 6-10. A water-retention anti-segregation agent is directly synthesized through a molecular structure design, thus greatly solving concrete bleeding and segregation problems, avoiding mildew and compatibility problems caused by a biomaterial and achieving water-retention anti-segregation effect. The technology is polymerization at normal temperature, is energy-saving and environmentally friendly, and is easy for large-scale promotion.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures in building materials, in particular to a concrete water-retaining anti-segregation agent and a preparation method thereof. Background technique [0002] With the development of building science, commercial concrete requires more and more high slump and high fluidity in order to improve construction performance and efficiency. Especially in underwater pile concrete, self-compacting concrete and high-rise pumping concrete, etc., it is of great significance. However, the fluidity and cohesion of concrete are often contradictory, that is, it is difficult for concrete to maintain high cohesion in a large flow state. In this way, the concrete that pursues high fluidity is prone to bleeding and segregation. Moreover, with the gradual depletion of river sand resources and mineral resources in my country, the gradation and fineness of river sand fluctuate greatly, ordinary machine-made sand ...

Claims

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Application Information

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IPC IPC(8): C08F283/06C08F220/56C08F230/08C08F220/06C08F228/02C08F2/38C04B24/42C04B28/04C04B103/46
CPCC04B24/42C04B28/04C04B2103/46C08F2/38C08F283/065C08F220/56C08F230/08C08F220/06C08F228/02C04B18/08C04B14/02C04B14/068C04B2103/302
Inventor 黄永毅杨顺荣朱鹏程肖尾俭李芳康净鑫
Owner 厦门路桥翔通建材科技有限公司
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