Low-dosage high-early-strength alkali-free liquid accelerator and preparation method thereof

An early-strength and accelerator technology, which is applied in the preparation of low-volume, high-early-strength, alkali-free liquid accelerators, and in the field of low-volume, high-early-strength, alkali-free liquid accelerators, can solve the problem of alkali-free liquids Low dosage of accelerator, high dosage, good stability and other problems, to achieve the effect of low cost, low dosage and good stability

Inactive Publication Date: 2020-06-26
刘翠芬
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, most of the current non-alkali liquid accelerator products use industrial-grade aluminum sulfate as the main accelerator component, and the following problems generally exist: (1) The dosage is relatively high
[0005] The above-mentioned technologies are helpful for how to make the preparation process of the non-

Method used

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  • Low-dosage high-early-strength alkali-free liquid accelerator and preparation method thereof
  • Low-dosage high-early-strength alkali-free liquid accelerator and preparation method thereof

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Embodiment 1

[0018] Embodiment 1: The low-dosage high-early-strength type alkali-free liquid quick-setting agent of the present invention is made of the raw materials of the following components and mass percentages: modified aluminum sulfate 50%, fluoroaluminum complex solution 4%, organic co-solvent 3%, pH regulator 1%, inorganic stabilizer 0.5%, viscosity modifier 0.5%, composite early strength agent 6%, water 35%, the sum of the mass percentages of the above components is 100% . The modified aluminum sulfate is made by mixing and grinding industrial aluminum sulfate and pseudo-boehmite with aluminum oxide content ≥ 16.0%, and the mass ratio of the two is: industrial aluminum sulfate: pseudo-boehmite= 9:1; Fluoroaluminum complex solution is made of water: fluorosilicic acid: industrial aluminum hydroxide according to the mass ratio of 1.5:2.5:1, stirred at room temperature for 30 minutes; organic co-solvent is made of diethanolamine and glycerol It is mixed according to the mass ratio ...

Embodiment 2

[0019] Embodiment 2: The low-dosage high-early-strength type alkali-free liquid quick-setting agent of the present invention is made of the raw materials of the following components and mass percentages: modified aluminum sulfate 55%, fluoroaluminum complex solution 3%, organic co-solvent 4%, pH regulator 1.5%, inorganic stabilizer 1.0%, viscosity modifier 0.5%, composite early strength agent 5%, water 30%, the sum of the mass percentages of the above components is 100% . The modified aluminum sulfate is made by mixing and grinding industrial aluminum sulfate and pseudo-boehmite with aluminum oxide content ≥ 16.0%, and the mass ratio of the two is: industrial aluminum sulfate: pseudo-boehmite= 9:1; Fluoroaluminum complex solution is made of water: fluorosilicic acid: industrial aluminum hydroxide according to the mass ratio of 1.5:2.5:1, stirred at room temperature for 20min; organic co-solvent is made of triethanolamine and glycerin It is mixed according to the mass ratio of...

Embodiment 3

[0020] Embodiment 3: The low-dosage high-early-strength type alkali-free liquid quick-setting agent of the present invention is made of the raw materials of the following components and mass percentages: modified aluminum sulfate 60%, fluoroaluminum complex solution 3%, organic co-solvent 6%, pH regulator 2%, inorganic stabilizer 0.7%, viscosity regulator 0.3%, composite early strength agent 5%, water 23%, the sum of the mass percentages of the above components is 100% . The modified aluminum sulfate is made by mixing and grinding industrial aluminum sulfate and pseudo-boehmite with aluminum oxide content ≥ 16.0%, and the mass ratio of the two is: industrial aluminum sulfate: pseudo-boehmite= 9:1; Fluoroaluminum complex solution is made of water: fluorosilicic acid: industrial aluminum hydroxide according to the mass ratio of 1.5:2.5:1, stirred at room temperature for 30 minutes; organic co-solvent is made of diethanolamine and glycerol It is mixed according to the mass ratio...

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Abstract

The invention discloses a low-dosage high-early-strength alkali-free liquid accelerator and a preparation method thereof. The alkali-free liquid accelerator is prepared from the following raw materials: 1, an alkali-free liquid accelerator; 50%-60% of modified aluminum sulfate, 2%-4% of a fluorine-aluminum complex solution, 3%-6% of an organic cosolvent, 1%-2% of a pH regulator, 0.5%-1.5% of an inorganic stabilizer, 0.3%-0.5% of a viscosity regulator, 4%-6% of a composite early strength agent and the balance of water, wherein the sum of the mass percentages of the components is 100%. The invention also provides a preparation method of the alkali-free liquid accelerator. The preparation process of the alkali-free liquid accelerator is simple; hydrofluoric acid-free process, alkali-free, chlorine-free, rust-free steel bar, non-polluting environment. Meanwhile, when the mixing amount of the alkali-free liquid accelerator is 5%-6%, the technical requirements of GB/T35159-2017 on the alkali-free accelerator can be met, the one-day compressive strength is larger than or equal to 13.0 MPa, and the alkali-free liquid accelerator has the advantages of being low in mixing amount, good in stability, high in early strength and large in later strength retention rate.

Description

technical field [0001] The invention relates to a concrete admixture, in particular to a low-volume, high-early-strength, alkali-free liquid accelerator. The invention also relates to a preparation method of the low-volume high-early-strength alkali-free liquid accelerator. Background technique [0002] In recent years, shotcrete has played an increasingly important role in my country's infrastructure construction and urban construction projects, and the amount of shotcrete has been increasing. Especially with the increasing number of tunnel construction projects in the process of high-speed railway and highway construction in western my country, higher and higher requirements are put forward for the performance and durability of shotcrete. As an essential admixture for shotcrete, accelerator is used to accelerate the setting and hardening of shotcrete, reduce rebound loss, prevent shotcrete from falling off due to gravity, and improve the early strength of concrete. The d...

Claims

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Application Information

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IPC IPC(8): C04B24/38C04B103/12
CPCC04B40/0039C04B2103/12C04B22/148C04B22/06C04B22/126C04B24/122C04B24/06C04B14/042C04B22/085C04B14/043
Inventor 赵明敏汪咏梅刘昭洋董树强王进春周海成刘翠芬
Owner 刘翠芬
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