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An in-situ reactive concrete air-entraining agent

A reaction, carbon atom technology, applied in the field of concrete air-entraining agent, can solve the problems of unreasonable bubble size, large loss of air content, influence on strength, etc., and achieve the effect of good air-entraining effect, high air content and strong cohesion

Active Publication Date: 2017-11-24
JIANGSU SOBUTE NEW MATERIALS +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Purpose of the invention: The patent of this invention mainly aims at the problems of insufficient air-entraining agent existing in existing concrete air-entraining agents, large loss of air content, unreasonable size of introduced air bubbles and affecting strength, etc., and provides a concrete air-entraining agent with a new molecular structure

Method used

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  • An in-situ reactive concrete air-entraining agent
  • An in-situ reactive concrete air-entraining agent
  • An in-situ reactive concrete air-entraining agent

Examples

Experimental program
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Effect test

Embodiment 1

[0035] Step 1: Add 1.0 mol of 2-butenol into a reaction flask equipped with a thermometer, dropping funnel, condenser, stirrer and tail gas conduit. The temperature was raised to 30°C under stirring, and 1.1 mol of chlorosulfonic acid was added to the reaction flask within 1 h. During the dropwise addition of chlorosulfonic acid, the reaction temperature was controlled at 30-50°C. After the dropwise addition, the reaction was continued at 30°C for 30 minutes. The system was then immediately neutralized to pH=5 with NaOH.

[0036] Step 2: in the drying flask that is equipped with thermometer, condenser and stirrer, add the unsaturated alcohol sulfate that obtains in the step 1 of 1.0mol and the HSi(OCH 3 ) 3 . The temperature was raised under stirring, and when the temperature reached 50°C, 0.07ml of 0.01mol / L isopropanol solution of chloroplatinic acid (amount of 1 ppm) was added dropwise, and the temperature was controlled at 50-80°C during the dropwise addition. After t...

Embodiment 2

[0040] Step 1: Add 1.0 mol of 3-methyl-7-heptenol into a reaction flask equipped with a thermometer, dropping funnel, condenser, stirrer and tail gas conduit. The temperature was raised to 30°C with stirring, and 1.2 mol of chlorosulfonic acid was added to the reaction flask within 1 h. During the dropwise addition of chlorosulfonic acid, the reaction temperature was controlled at 30-60°C. After the dropwise addition was completed, the reaction was continued at 50° C. for 10 minutes. The system was then immediately neutralized to pH=6 with KOH.

[0041] Step 2: in the drying flask that is equipped with thermometer, condenser and stirrer, add the unsaturated alcohol sulfate that obtains in the step 1 of 1.0mol and the HSi(OCH 2CH 3 ) 3 . Heat up under stirring, when the temperature reaches 50°C, add dropwise 0.9ml of 0.01mol / L isopropanol solution of chloroplatinic acid (amount of 10ppm), and control the temperature at 50-100°C during the dropwise addition. After the drop...

Embodiment 3

[0045] Step 1: Add 1.0 mol of undecenyl alcohol into a reaction flask equipped with a thermometer, dropping funnel, condenser, stirrer and tail gas conduit. The temperature was raised to 30°C under stirring, and 1.0 mol of chlorosulfonic acid was added to the reaction flask within 1 hour. During the dropwise addition of chlorosulfonic acid, the reaction temperature was controlled at 40-60°C. After the dropwise addition, the reaction was continued at 60°C for 60 min. The system was then immediately neutralized to pH=7 with KOH.

[0046] Step 2: in the drying flask that is equipped with thermometer, condenser and stirrer, add the unsaturated alcohol sulfate that obtains in the step 1 of 1.0mol and the HSi(OCH 2 CH 3 ) 3 . Heat up under stirring, when the temperature reaches 50°C, add 11.8ml of 0.01mol / L isopropanol solution of chloroplatinic acid (amount of 100ppm) dropwise, and control the temperature at 60-90°C during the dropwise addition. After the dropwise addition, t...

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Abstract

Based on the principle of molecular design, the present invention prepares a concrete air-entraining agent molecule with sulfate ions as hydrophilic groups and aliphatic hydrocarbons modified with reactive alkoxy silicon groups as hydrophobic parts. Its structural formula is as follows: (I) shown. The invention also provides a preparation method of the above compound and its application as a concrete air-entraining agent. The compound is both surface active and in situ reactive. When used as a high-efficiency air-entraining agent for concrete, it exhibits the following excellent properties: first, it has a good air-entraining effect at a low dosage, and the size distribution of the introduced bubbles is reasonable; second, it has a good foam-stabilizing effect and contains The air volume remains high; third, it has little effect on the strength of concrete.

Description

technical field [0001] The invention belongs to the field of building materials and relates to a concrete air-entraining agent. Background technique [0002] In the concrete mixing process, the air-entraining agent can be added to introduce a large number of uniform and stable micro-bubbles. The existence of these micro-bubbles plays an important role in improving the durability and freeze-thaw resistance of concrete. The most widely used air-entraining agents include rosin air-entraining agents, saponin air-entraining agents, alkylbenzene sulfonate air-entraining agents and fatty acid salt air-entraining agents. With the development of construction projects, these traditional air-entraining agent products can no longer keep up with the requirements of modern high-performance concrete, and problems such as insufficient air-entrainment, poor foam stabilization, and impact on strength have been exposed. [0003] At present, the development of air-entraining agents adopts more...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/42
Inventor 刘冠男乔敏冉千平高南箫
Owner JIANGSU SOBUTE NEW MATERIALS
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