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Low-addition-amount environment-friendly alkali-free chlorine liquid accelerator and preparation method thereof

A kind of quick-setting agent and green technology, which is applied in the field of low-dosage green alkali-free chlorine liquid quick-setting agent and its preparation, can solve the problems of high alkali content of liquid quick-setting agent, large strength loss at 28 days, poor stability period, etc., and achieve Rapid preparation, reduced energy consumption, and no loss of strength

Active Publication Date: 2016-06-08
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a low-volume green alkali-free chlorine-free liquid quick-setting agent and a preparation method thereof. The quick-setting agent prepared by the method can solve the problems of high alkali content, large dosage, and poor stability of the liquid quick-setting agent. , 28d strength loss and other problems

Method used

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  • Low-addition-amount environment-friendly alkali-free chlorine liquid accelerator and preparation method thereof
  • Low-addition-amount environment-friendly alkali-free chlorine liquid accelerator and preparation method thereof

Examples

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Effect test

Embodiment 1

[0033] Low-volume green alkali-free chlorine liquid quick-setting agent, including the following components in mass percentage: aluminum sulfate: 45%, magnesium sulfate 8%, diethanolamine 10%, formic acid 5%, polyacrylic acid 5%, citric acid 1%, Tap water: 26%.

[0034] The preparation method of this low-volume non-alkali chlorine liquid quick-setting agent:

[0035] Add tap water into a water bath container and heat to 60°C; gradually add aluminum sulfate under continuous stirring until it dissolves into a suspension of small particles; add stabilizer and keep the temperature at 60°C for 15 minutes; slowly add alcohol amine, and stir at constant temperature until the sulfuric acid All aluminum is dissolved into a clear and transparent solution; magnesium sulfate is added and stirred until completely dissolved; organic acid and high molecular polymer are added and stirred until the solution is cooled to room temperature to obtain a low-volume green alkali-free liquid accelerat...

Embodiment 2

[0037] Low-volume green non-alkali chlorine liquid quick-setting agent, including the following components in mass percentage: aluminum sulfate: 50%, magnesium sulfate 6%, triethanolamine 9%, benzoic acid 2%, polyacrylamide 2%, citric acid 3% %, tap water: 28%.

[0038] Heat the water to 55°C; add aluminum sulfate under continuous stirring until it dissolves into a suspension of small particles; add stabilizer and keep the temperature at 55°C for 20 minutes; slowly add alcohol amine, stir at 55°C until the aluminum sulfate is completely dissolved To clarify the transparent solution, stop heating; add magnesium sulfate, stir until completely dissolved; add organic acid and high molecular polymer, stir until the solution is cooled to room temperature, and obtain a low-volume green alkali-free liquid accelerator.

Embodiment 3

[0040] Low-volume green alkali-free chlorine liquid quick-setting agent, including the following components in mass percentage: aluminum sulfate: 50%, magnesium sulfate 10%, diethanolamine 5%, oxalic acid 1%, polyacrylic acid 4%, tap water: 30% %.

[0041] Heat the water to 65°C; add aluminum sulfate under continuous stirring until it dissolves into a suspension of small particles; add stabilizer and keep the temperature at 65°C for 15-20min; slowly add alcohol amine, stir at 65°C until aluminum sulfate All dissolve into a clear and transparent solution, stop heating; add magnesium sulfate, stir until completely dissolved; add organic acid and high molecular polymer, stir until the solution is cooled to room temperature, and obtain a low-volume green alkali-free liquid accelerator.

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Abstract

The invention discloses a low-addition-amount environment-friendly alkali-free chlorine liquid accelerator. The low-addition-amount environment-friendly alkali-free chlorine liquid accelerator is prepared from, by mass, 45-55% of aluminum sulphate, 5-10% of magnesium sulfate, 5-10% of alcohol amine, 1-5% of organic acid, 1-5% of high-molecular polymer, 0-3% of a stabilizing agent and the balance water. The aluminum sulphate is at the industrial level, and the mass fraction percent of alumina is larger than or equal to 16.00. The magnesium sulfate is at the industrial level, and the alcohol amine is diethanolamine or triethanolamine. The organic acid is oxalic acid, formic acid or benzoic acid. The high-molecular polymer is polyacrylic acid or polyacrylamide. The stabilizing agent contains citric acid. The organic acid is used as a coagulation accelerating component and a pH adjusting agent, and on the basis that no alkali exists, the accelerator is stable and free of strength loss within 28 days, and concrete resilience is small, the addition amount is remarkably reduced; polyacrylic acid is used, not only is later-stage strength not affected, but also the stability of a solution is improved, and the stable time of the accelerator is longer than half a year.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a low-volume green alkali-free chlorine liquid quick-setting agent and a preparation method thereof. Background technique [0002] Cement and concrete, as building materials with a development history of more than 100 years, play an important role in infrastructure construction. The emergence of accelerators has greatly shortened the setting and hardening time of concrete, making shotcrete construction a widely used technology. [0003] According to the construction method of sprayed concrete and the type of quick-setting agent used, it can be divided into three types: dry spraying, tidal spraying and wet spraying. Dry spraying has the disadvantages of large amount of dust in the working environment and large randomness in the concrete water-cement ratio adjusted by the on-site workers, which makes it difficult to guarantee the quality of shotcrete. Compa...

Claims

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Application Information

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IPC IPC(8): C04B24/26C04B103/12
CPCC04B40/0039C04B2103/12C04B22/148C04B22/142C04B24/122C04B24/04C04B24/06C04B24/2641C04B24/2652
Inventor 万惠文魏凯李箫蔡雷
Owner WUHAN UNIV OF TECH
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