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Liquid setting 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, can solve problems such as difficult to configure accelerator, unstable solution state, and low solubility of aluminum sulfate, so as to reduce negative reactions, low raw material cost, The effect of low alkali content

Pending Publication Date: 2021-07-02
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the alkali-free accelerator with aluminum sulfate as the main quick-setting component, aluminum ions are mainly used for quick-setting. Therefore, in order to improve the quick-setting effect of the accelerator, the content of aluminum ions in the solution must be increased. However, the solubility of aluminum sulfate is small, and the solution state is easily unstable. In order to obtain an accelerator with excellent performance, a stable solution with high chlorine content must be prepared.
It is difficult to prepare an ideal quick-setting agent by using aluminum sulfate alone as a quick-setting component

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] 1. Weigh sodium fluoride, sodium fluorosilicate, magnesium fluorosilicate, water, and sodium edetate according to the ratio in Table 1 and mix them into a three-necked flask, heat to 60-100°C, and stir thoroughly for 30 -50 minutes until the solution state is stable, wherein the mass ratio of the sum of sodium fluorosilicate and magnesium fluorosilicate to the complexing agent is 1.1:1.

[0060] 2. Weigh aluminum sulfate and calcium oxide according to the ratio in Table 1 and add them to a three-neck flask, heat to 60-100°C, and stir thoroughly for 40-100 minutes until the solution is stable.

[0061] 3. Weigh diethanolamine and triethanolamine according to the ratio in Table 1 (the mass ratio of diethanolamine and triethanolamine is 10:3) into a three-necked flask, heat to 60-100°C, and stir thoroughly for 30-60 minutes until The solution state is stable, and the liquid quick-setting agent is obtained.

Embodiment 2

[0063] 1. Weigh sodium fluoride, sodium fluorosilicate, magnesium fluorosilicate, water, and sodium edetate according to the ratio in Table 1 and mix them into a three-necked flask, heat to 60-100°C, and stir thoroughly for 30 -50 minutes, until the solution state is stable, wherein the mass ratio of the sum of sodium fluorosilicate and magnesium fluorosilicate to the complexing agent is 1.5:1.

[0064] 2. Weigh aluminum sulfate and calcium oxide according to the ratio in Table 1 and add them to a three-neck flask, heat to 60-100°C, and stir thoroughly for 40-100 minutes until the solution is stable.

[0065] 3. Weigh diethanolamine and triethanolamine according to the ratio in Table 1 (the mass ratio of diethanolamine and triethanolamine is 10:3) into a three-necked flask, heat to 60-100°C, and stir thoroughly for 30-60 minutes until The solution state is stable, and the liquid quick-setting agent is obtained.

Embodiment 3

[0067] 1. Weigh sodium fluoride, sodium fluorosilicate, magnesium fluorosilicate, water, and sodium edetate according to the ratio in Table 1 and mix them into a three-necked flask, heat to 60-80°C, and stir thoroughly for 30 -70 minutes until the solution state is stable, wherein the mass ratio of the sum of sodium fluorosilicate and magnesium fluorosilicate to the complexing agent is 1:1.

[0068] 2. Weigh aluminum sulfate and calcium oxide according to the ratio in Table 1 and add them into a three-neck flask, heat to 60-80°C, and stir thoroughly for 40-120 minutes until the solution is stable.

[0069] 3. Weigh diethanolamine and triethanolamine according to the ratio in Table 1 (the mass ratio of diethanolamine and triethanolamine is 10:3) into a three-necked flask, heat to 60-80°C, and stir thoroughly for 30-80 minutes until The solution state is stable, and the liquid quick-setting agent is obtained.

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Abstract

The invention relates to a liquid setting accelerator as well as a preparation method and application thereof. The liquid setting accelerator comprises aluminum salt, fluoride salt, fluosilicate, a first stabilizer, a complexing agent, a water solvent and optional other components; the other components comprise fluoride salt and / or a second stabilizer, the mass content of the fluosilicate is 8-12% by mass of the aluminum salt, and the mass content of the complexing agent is 6-10% by mass of the aluminum salt. The liquid setting accelerator provided by the invention can achieve good rapid setting effects under the condition of low mixing amount, wherein the good rapid setting effects comprise faster initial setting time and final setting time, higher compressive strength and the like.

Description

technical field [0001] The invention relates to the field of concrete admixtures, in particular to a liquid accelerator and its preparation method and application. Background technique [0002] Accelerator is a chemical admixture that can make cement or concrete harden quickly, and it is an essential admixture component in shotcrete. Since the 1990s, my country began to promote the concrete construction technology. Ensuring the quality of sprayed finished products and a reasonable construction process have become the key issues. The development of an accelerator with excellent performance and good promoting effect is the premise guarantee. [0003] The high content of alkali in traditional liquid accelerators, on the one hand, causes corrosion damage to construction personnel, and on the other hand, may also cause concrete alkali-aggregate reaction. In today's on-site application, liquid accelerators mainly include two categories: low-alkali and non-alkali. Most of the ini...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/12C04B103/12
CPCC04B40/0039C04B2103/12C04B22/126C04B24/121C04B22/148C04B22/064C04B24/122
Inventor 王栋民吴亚男王璜琪张力冉
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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