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Alkali-free setting accelerator and production method thereof

A production method and technology of accelerators, applied in the field of alkali-free accelerators, can solve the problems of high toxicity, unstable solution, short storage time, etc., achieve stable quality, improve later strength and impermeability grade, and long storage time Effect

Inactive Publication Date: 2018-02-23
山东鲁碧环保科技有限公司 +1
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, hydrofluoric acid and fluoride are added to some alkali-free accelerators, which are highly toxic; aluminum hydroxide and sodium aluminate are added to some alkali-free accelerators. Since aluminum hydroxide is insoluble, the resulting solution is unstable. short storage time

Method used

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Embodiment Construction

[0017] In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific embodiments.

[0018] The invention provides a technical solution: an alkali-free accelerator, which is composed of the following raw materials: aluminum sulfate, a complexing agent, organic alcohol amines and amides.

[0019] The organic alcohol amine is one or both of diethanolamine or triethanolamine, and the amide substance is urea. The urea is mixed with purified ammonia and carbon dioxide at a molar ratio of 2.8 to 4.5 and enters the synthesis tower. The pressure inside the tower is 13.8 ~24.6MPa, temperature is 180~200℃, residence time of reaction materials is 25~40min, and urea solution containing excess ammonia and ammonium carbamate is obtained. After decompression and cooling, the urea solution after separation of ammonia and ammonium carbamate is evap...

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PUM

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Abstract

The invention provides an alkali-free setting accelerator. The alkali-free setting accelerator contains the following raw materials: aluminum sulfate, a coordination agent, organic alcohol amine and amide matters. The invention further provides a production method of the alkali-free setting accelerator. Compared with the prior art, the alkali-free setting accelerator has the beneficial effects that the accelerator can meet the quick setting requirement of wet spraying concrete, the environment-friendly and pollution-free construction environment can be realized, the stable quality of sprayed concrete is guaranteed, and meanwhile, the long-term strength and impermeability grade of the sprayed concrete can be greatly increased. The alkali-free setting accelerator is long in storage time, canresist temperature change and is totally non-alkaline.

Description

technical field [0001] The invention relates to an alkali-free setting accelerator. The invention relates to the production field of concrete accelerators, in particular to an alkali-free setting accelerator and a manufacturing method thereof. The prepared quick-setting agent is suitable for spraying construction. concrete. Background technique [0002] Accelerator is a kind of setting agent that can accelerate the setting and hardening speed of concrete. The quick-setting agent is mainly used in the preparation of shotcrete, shotcrete, and grouting and water-stopping concrete for repairing and strengthening projects. admixture. [0003] Traditional accelerators are divided into powder accelerators and liquid accelerators. Since powder accelerators are suitable for dry spraying construction technology, the spray quality is difficult to be guaranteed, and the amount of dust and rebound are large. Dry spraying The law belongs to the elimination of backward construction tech...

Claims

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Application Information

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IPC IPC(8): C04B24/38C04B24/32C04B24/26C04B103/12
CPCC04B40/0039C04B2103/12C04B22/148C04B24/122C04B24/126C04B22/165C04B24/04C04B24/383
Inventor 赵会刘永恒张泗强王庆福李德亮郑丰生曹继康高淑星孙健
Owner 山东鲁碧环保科技有限公司
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