Air entraining agent for concrete

An air-entraining agent and concrete technology, applied in the field of concrete air-entraining agent, can solve the problems of ineffective fresh concrete workability, unreasonable bubble structure, uneven distribution, etc. Stable, evenly distributed effect

Inactive Publication Date: 2016-11-16
GUILIN HUAYUE ENVIRONMENTAL PROTECTION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most existing air-entraining agents have deficiencies such as unreasonable bubble structure, uneven distribution, unstable bubbles, and improper size, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A concrete air-entraining agent, made of the following raw materials in parts by weight: 25 parts of rosin powder (particle diameter is 50nm), 35 parts of potassium hydroxide (mass concentration is 30%), 5 parts of sulfuric acid (mass concentration is 20%) , 30 parts of melamine, 5 parts of polyvinyl alcohol, 20 parts of glutaconic acid, and 80 parts of water.

[0019] The preparation method of the above-mentioned concrete air-entraining agent is as follows: put rosin powder, sulfuric acid, melamine and water into the reaction kettle, mix and stir for 20 minutes, heat to 65°C, keep warm for 40min, heat up to 78°C, slowly add polyvinyl alcohol, keep warm After 30 minutes, the temperature was raised to 85°C, glutaconic acid and potassium hydroxide were slowly added in sequence, and the temperature was kept for 50 minutes to obtain the product.

Embodiment 2

[0021] A concrete air-entraining agent, made of the following raw materials in parts by weight: 40 parts of rosin powder (particle diameter is 60nm), 30 parts of potassium hydroxide (mass concentration is 35%), 8 parts of sulfuric acid (mass concentration is 25%) , 27 parts of melamine, 7 parts of polyvinyl alcohol, 18 parts of glutaconic acid, and 100 parts of water.

[0022] The preparation method of the above-mentioned concrete air-entraining agent is as follows: put rosin powder, sulfuric acid, melamine and water into the reaction kettle, mix and stir for 18 minutes, heat to 68°C, keep warm for 35min, heat up to 79°C, slowly add polyvinyl alcohol, keep warm After 25 minutes, the temperature was raised to 86°C, glutaconic acid and potassium hydroxide were slowly added in sequence, and the temperature was kept for 45 minutes to obtain the product.

Embodiment 3

[0024] A concrete air-entraining agent, made of the following raw materials in parts by weight: 35 parts of rosin powder (50-100 nm in particle size), 25 parts of potassium hydroxide (40% in mass concentration), 30 parts in sulfuric acid (30% in mass concentration) 10 parts, melamine 25 parts, polyvinyl alcohol 10 parts, glutaconic acid 15 parts, water 120 parts.

[0025] The preparation method of the above concrete air-entraining agent is as follows: put rosin powder, sulfuric acid, melamine and water into the reaction kettle, mix and stir for 15 minutes, heat to 70°C, keep warm for 30min, heat up to 80°C, slowly add polyvinyl alcohol, keep warm After 20 minutes, the temperature was raised to 87°C, glutaconic acid and potassium hydroxide were slowly added in sequence, and the temperature was kept for 40 minutes to obtain the product.

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PUM

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Abstract

The invention belongs to the technical field of concrete admixtures, and particularly relates to a concrete air-entraining agent, which is made of the following raw materials in parts by weight: 25-45 parts of rosin powder, 15-35 parts of potassium hydroxide, 5-15 parts of sulfuric acid, and 20 parts of melamine ~30 parts, 5~15 parts of polyvinyl alcohol, 10~20 parts of glutaconic acid, 80~160 parts of water. The concrete air-entraining agent of the present invention is added to concrete with reasonable bubble structure, uniform distribution, stable bubble size and appropriate size, significantly improves the workability and durability of cement, has good compoundability with other admixtures, and has strong adaptability to concrete .

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, in particular to a concrete air-entraining agent. Background technique [0002] Concrete air-entraining agent can effectively improve the workability of concrete, reduce the bleeding performance, and greatly improve the anti-freeze and anti-seepage performance of concrete. Concrete roads and bridges with ice and salt are especially important. In addition, fly ash is often used as an active admixture in the configuration of these concretes to improve the workability of fresh concrete and reduce the tendency of large-volume concrete to shrink and crack. However, it has been found that some fly ash with a high loss on ignition often reduces the air-entraining effect of the air-entraining agent because it contains unburned carbon particles. [0003] In commercial concrete, the use of high-quality air-entraining agents can significantly improve the performance of plastic concrete and har...

Claims

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Application Information

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IPC IPC(8): C04B24/34C04B103/30
CPCC04B40/0039C04B2103/304
Inventor 陈威黄煌王恒尹丹阮长泰谢体云欧鹏
Owner GUILIN HUAYUE ENVIRONMENTAL PROTECTION TECH CO LTD
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