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Liquid quick-setting agent and preparation method thereof

A quick-setting agent and liquid technology, applied in the field of building materials, can solve problems such as easy crystallization and precipitation, product performance failure, and inability to store for a long time

Active Publication Date: 2016-01-27
XINJIANG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aluminum sulfate in the actual liquid alkali-free accelerator is in a highly supersaturated state, so it is not stable enough to be stored for a long time, and it is easy to crystallize and precipitate, resulting in product performance failure

Method used

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  • Liquid quick-setting agent and preparation method thereof
  • Liquid quick-setting agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 45.5% aluminum sulfate, 8.3% diethanolamine, 1.2% phosphoric acid and 1.2% sodium fluoride can be added to 43.8% water in any order, preferably 45.5% aluminum sulfate is first added to 43.8% After that, add 8.3% diethanolamine, 1.2% phosphoric acid and 1.2% sodium fluoride in sequence. The mixed solution was heated to 50° C. and stirred with a conventional stirring device until a clear solution was obtained, and then cooled to room temperature.

Embodiment 2

[0028] 51% aluminum sulfate, 10.5% diethanolamine, 1.5% phosphoric acid and 1.5% sodium fluoride can be added to 35.5% water in any order, preferably 51% aluminum sulfate is first added to 35.5% After soaking in water, add 10.5% diethanolamine, 1.5% phosphoric acid and 1.5% sodium fluoride in sequence. The mixed solution was heated to 55° C. and stirred with a conventional stirring device until a clear solution was obtained and then cooled to room temperature.

Embodiment 3

[0030] 55% aluminum sulfate, 10.5% diethanolamine, 2% phosphoric acid and 1.5% sodium fluoride can be added to 31% water in any order, preferably 55% aluminum sulfate is added to 31% After soaking in water, add 10.5% diethanolamine, 2% phosphoric acid and 1.5% sodium fluoride in sequence. The mixed solution was heated to 60°C and stirred with a conventional stirring device until a clear solution was obtained and then cooled to room temperature.

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PUM

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Abstract

The invention provides a liquid quick-setting agent and a preparation method thereof. The liquid quick-setting agent adopts aluminum sulfate as a main material, and is low in alkaline content, good in quick-setting effect and high in stability. The preparation method comprises the following steps of: uniformly mixing the following materials in percent by weight: 45%-60% of aluminium sulfate, 5%-15% of alcohol amine, 0.5%-5% of solubilizing agent, 0-5% of setting accelerator and the balance of water, thus obtaining the liquid quick-setting agent; the content of Al2O3 of the aluminium sulfate is 14%-17%; the solubilizing agent is phosphoric acid and / or hydroxy carboxylic acid with the number of carbon atoms being not more than 6; the setting accelerator is at least one of water-soluble nitrate, nitrite, sulfate, fluoride salt, carbonate and carboxylate-sulfonate-nonionic terpolymer. The liquid quick-setting agent obtained by the preparation method is used for jetting concrete, the doping amount is generally 5%-8% of the mass of cement, the quick setting effect is good, the stability is high and the stable period reaches more than 180 days.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to a liquid accelerator for concrete and a preparation method thereof. Background technique [0002] Shotcrete is a necessary construction method in the construction process of modern underground engineering, tunnel engineering and slope support. This construction method can be divided into dry spraying and wet spraying processes according to the spraying process. For the dry spraying process, due to the need to add a high-alkaline powder accelerator in a dry and fast stirring state, it will inevitably lead to A large amount of dust is flying, and the alkali is highly corrosive, which brings great harm to the health of the spraying workers. And dry sprayed concrete can only complete the concrete construction below C20, and the rebound rate is high, and the later strength is significantly reduced. In order to overcome the above defects, researchers have successively develo...

Claims

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Application Information

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IPC IPC(8): C04B24/12C04B24/16C04B103/12
Inventor 温勇
Owner XINJIANG UNIVERSITY
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