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High-efficiency air-entrainer for roller compacted concrete and preparation method thereof

A technology of roller compacted concrete and air-entraining agent, applied in the preparation of high-efficiency air-entraining agent for roller-compacted concrete, and in the field of high-efficiency air-entraining agent for roller-compacted concrete, which can solve the problem of high air-entraining efficiency and foam stability of air-entraining agent Good, good solubility, etc., to achieve the effect of reduced production cost, good foam stability, and good solubility

Inactive Publication Date: 2019-07-12
刘翠芬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above technologies have not given specific guidance on how to make the air-entraining agent for roller compacted concrete have high air-entraining efficiency, good foam stability, low dosage, and good solubility.

Method used

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  • High-efficiency air-entrainer for roller compacted concrete and preparation method thereof
  • High-efficiency air-entrainer for roller compacted concrete and preparation method thereof

Examples

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Effect test

Embodiment 1

[0016]Embodiment 1: The high-efficiency air-entraining agent for roller compacted concrete of the present invention is made of the following components and raw materials in parts by mass: 22 parts of 1,4-dibromobutane, long-chain alkyl primary amine That is, 43 parts of dodecyl primary amine, 16 parts of formaldehyde, 17 parts of formic acid, 38 parts of 3-chloro-2-hydroxypropanesulfonate sodium, 20 parts of deionized water, 100 parts of absolute ethanol, the mass percentage concentration is 28.5% The sodium hydroxide solution, its consumption should meet the requirement of the pH value of the solution after adjustment. The preparation method of the described high-efficiency air-entraining agent for roller compacted concrete comprises the following process steps: ① firstly add dodecyl primary amine and 30 parts of absolute ethanol into the there-necked bottle according to the mass parts of the above-mentioned raw materials, start the mechanical stirring, Heat the oil bath to 3...

Embodiment 2

[0017] Embodiment 2: The high-efficiency air-entraining agent for roller compacted concrete of the present invention is made of the following components and raw materials in parts by mass: 25 parts of 1,4-dibromobutane, long-chain alkyl primary amine That is, 50 parts of tetradecyl primary alkane, 18 parts of formaldehyde, 17 parts of formic acid, 42 parts of 3-chloro-2-hydroxypropanesulfonate sodium, 20 parts of deionized water, 105 parts of absolute ethanol, the mass percentage concentration is 30% Sodium hydroxide (water) solution, its consumption should meet the requirement of the pH value of solution after adjustment. The preparation method of the described high-efficiency air-entraining agent for roller compacted concrete comprises the following process steps: ① according to the mass fraction of the above-mentioned raw materials, first add tetradecyl primary alkane and 35 parts of absolute ethanol into the there-necked bottle, start the mechanical stirring, The temperatu...

Embodiment 3

[0018] Embodiment 3: The high-efficiency air-entraining agent for roller compacted concrete of the present invention is made of the following components and raw materials in parts by mass: 24 parts of 1,4-dibromobutane, hexadecyl primary amine 52 parts, 18 parts of formaldehyde, 16 parts of formic acid, 40 parts of sodium 3-chloro-2-hydroxypropanesulfonate, 30 parts of deionized water, 110 parts of absolute ethanol, and a sodium hydroxide solution with a mass percentage concentration of 28.5%. The dosage should meet the requirement of the pH value of the adjusted solution. The preparation method of the high-efficiency air-entraining agent for roller compacted concrete comprises the following process steps: 1. first add long-chain alkyl primary amines and 40 parts of absolute ethanol into the there-necked bottle according to the mass fraction of the above-mentioned raw materials, start mechanical stirring, Heat the oil bath to 35°C; ② Dissolve 1,4-dibromobutane in 25 parts of a...

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Abstract

A high-efficiency air-entrainer for roller compacted concrete and a preparation method thereof are disclosed. The air-entrainer is prepared from the following raw materials (by weight): 22-25 parts of1,4-dibromobutane, 43-58 parts of long-chain alkyl primary amine, 16-18 parts of formaldehyde, 13-17 parts of formic acid, 38-42 parts of sodium 3-chloro-2-hydroxy propanesulfate, 20-30 parts of deionized water, 100-110 parts of anhydrous ethanol, and a sodium hydroxide solution. The long-chain alkyl primary amine is one or two of dodecanamine, tetradecyl primary alkane and hexadecyl primary amine. The invention also provides a preparation method of the air-entrainer. The air-entrainer of the invention has a good molecular structure, is endowed with lower surface tension, lower critical micelle concentration and good foam performance and foam stability in comparison with a common concrete air-entrainer, especially has advantages of low dosage and high gas content for roller compacted concrete with low cubic water consumption, and can be applied to water conservancy and water-power engineering. The air-entrainer of the invention has high air-entraining efficiency, good foam stability,low dosage and good dissolvability, is convenient to use, and is economical and practical.

Description

technical field [0001] The invention relates to a concrete air-entraining agent, in particular to a high-efficiency air-entraining agent for roller compacted concrete. The invention also relates to a preparation method of the high-efficiency air-entraining agent for roller compacted concrete. Background technique [0002] At present, the commonly used concrete air-entraining agents in the market include polyether air-entraining agents, rosin air-entraining agents, alkylsulfonate air-entraining agents, etc., which can meet the needs of ordinary concrete projects. Polyether air-entraining agent is a product obtained by polymerizing alkyl alcohol with ethylene oxide and propylene oxide under the action of a basic catalyst. It is a non-ionic air-entraining agent. Under the influence of the electrolyte in the concrete, it is possible to introduce fine air bubbles into the concrete. However, because the hydrophilicity of the hydrophilic group is weaker than that of the ionic gro...

Claims

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Application Information

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IPC IPC(8): C04B24/16C04B103/30
CPCC04B24/16C04B2103/304
Inventor 倪涛刘昭洋宋欣王进春刘旭飞姚晓鹏刘翠芬康静
Owner 刘翠芬
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