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Liquid accelerator as well as preparation method and application thereof

A technology of accelerator and liquid, which is applied in the field of liquid accelerator and its preparation, and can solve problems affecting solution stability, high energy consumption, aggregation and thickening, etc.

Pending Publication Date: 2020-07-17
SHANXI SUNWAY INTION TRADE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the low-alkali liquid quick-setting agent of this patent needs to be heated to 60-80°C to react, and the energy consumption is high, and the formation of aluminum hydroxide sol by neutralization with sodium aluminate solution and aluminum sulfate solution is prone to gel aggregation and thickening. Affect the reaction progress and solution stability

Method used

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  • Liquid accelerator as well as preparation method and application thereof
  • Liquid accelerator as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] Step 1. Mix 44 parts by weight of sodium hydroxide and 96 parts by weight of deionized water, heat to 100°C, add 60 parts by weight of aluminum hydroxide, and react for 3 hours to obtain a solution containing sodium metaaluminate;

[0070] Step 2, sequentially add 210 parts by weight of deionized water and 200 parts by weight of the solution containing sodium metaaluminate obtained in step 1 into the reactor equipped with a stirrer, stir evenly, and add 420 parts by weight of industrial sulfuric acid in 3 times Aluminum (adding 140 parts by weight each time), mixing and stirring for 15 minutes after adding each time, after adding all the industrial aluminum sulfate, mixing and stirring for 20 minutes to obtain the first mixed solution;

[0071] Step 3, adding 20 parts by weight of citric acid into the first mixed solution obtained in step 2, stirring and reacting for 30 minutes, to obtain the second mixed solution;

[0072] Step 4. Add 125 parts by weight of inorganic a...

Embodiment 2

[0075] Step 1. Mix 62.5 parts by weight of sodium hydroxide and 100 parts by weight of deionized water, heat to 110°C, add 87.5 parts by weight of aluminum hydroxide, and react for 2 hours to obtain a solution containing sodium metaaluminate;

[0076] Step 2, sequentially add 140 parts by weight of deionized water and 250 parts by weight of the solution containing sodium metaaluminate obtained in step 1 into the reactor equipped with a stirrer, stir evenly, and add 400 parts by weight of industrial sulfuric acid in 4 times Aluminum (adding 100 parts by weight each time), mixing and stirring for 10 minutes after adding each time, after adding all the industrial aluminum sulfate, mixing and stirring for 15 minutes to obtain the first mixed solution;

[0077] Step 3, adding 20 parts by weight of diethanolamine into the first mixed solution obtained in step 2, stirring and reacting for 45 minutes, to obtain a second mixed solution;

[0078] Step 4. Add 180 parts by weight of inorg...

Embodiment 3

[0081] Step 1. Mix 62.1 parts by weight of sodium hydroxide and 121.5 parts by weight of deionized water, heat to 120°C, add 86.4 parts by weight of aluminum hydroxide, and react for 4 hours to obtain a solution containing sodium metaaluminate;

[0082] Step 2, sequentially add 50 parts by weight of deionized water and 270 parts by weight of the solution containing sodium metaaluminate obtained in step 1 into the reactor equipped with a stirrer, stir evenly, and add 350 parts by weight of industrial sulfuric acid in 2 times Aluminum (adding 175 parts by weight each time), mixing and stirring for 15 minutes after adding each time, after adding all the industrial aluminum sulfate, mixing and stirring for 20 minutes to obtain the first mixed solution;

[0083]Step 3, adding 15 parts by weight of triethanolamine into the first mixed solution obtained in step 2, stirring and reacting for 30 minutes, to obtain a second mixed solution;

[0084] Step 4. Add 300 parts by weight of inor...

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Abstract

The invention discloses a liquid accelerator and a preparation method thereof. The liquid accelerator is prepared from the following raw materials: a solution containing metaaluminate, aluminum sulfate, an inorganic acid solution, a complexing stabilizer, water, an optional anti-settling agent and an optional acidity neutralizer. The liquid low-alkali accelerator provided by the invention has theadvantages of rapid cement setting and hardening, rapid development of early strength of sprayed concrete, basically no loss of later strength and the like at a relatively low mixing amount, has widecement adaptability, and can still provide excellent rapid hardening and early strength properties for cement with low C3A content; the liquid accelerator has the advantages of no (low) corrosion, stable long-term storage performance, simple production process, easily controlled conditions, good economic benefit and wide application prospect.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a liquid accelerator and its preparation method and application. Background technique [0002] With the massive construction of traffic tunnels, mine roadway support, repair and reinforcement, and waterproof and plugging projects, accelerators with rapid setting and hardening functions have become indispensable admixtures for modern shotcrete. [0003] At present, the liquid accelerators used in wet shotcrete are mainly alkali accelerators and alkali-free accelerators. Alkaline quick-setting agents generally have high alkali content, strong corrosion and easy to cause physical harm to construction workers, and strong alkali characteristics can easily cause alkali-aggregate reaction, which will significantly reduce the later strength of concrete, reduce the impermeability level, and affect the strength of concrete. Durability is not conducive to the construction of t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/06C04B24/12C04B24/04C04B103/12
CPCC04B40/0039C04B2103/12C04B22/0093C04B22/148C04B24/06C04B22/126C04B22/141C04B22/06C04B22/066C04B24/122C04B22/165C04B22/00
Inventor 徐忠洲王英维苗瑞文
Owner SHANXI SUNWAY INTION TRADE CO LTD
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