A kind of high-strength alkali-free liquid quick-setting agent, preparation method and application thereof

An accelerator and high-strength technology, applied in the field of building materials, can solve the problems of high dosage, narrow cement adaptability, and high cost, and achieve the effects of low dosage, wide application range and low cost

Active Publication Date: 2021-11-02
四川琪汇新材料有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The invention provides a method for preparing a high-strength non-alkali liquid quick-setting agent, which is used to solve the technical problems in the prior art: the non-alkali liquid quick-setting agent has narrow adaptability to cement, high dosage and high cost

Method used

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  • A kind of high-strength alkali-free liquid quick-setting agent, preparation method and application thereof
  • A kind of high-strength alkali-free liquid quick-setting agent, preparation method and application thereof

Examples

Experimental program
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Embodiment 1

[0044] A high-strength alkali-free liquid quick-setting agent, comprising the following components, calculated in parts by weight:

[0045] Aluminum sulfate 37 parts; aluminum hydroxide 3.5 parts; hydrofluoric acid 7 parts; magnesium sulfate 8 parts; magnesium oxide 2.4 parts; tween-20 0.8 parts; precipitated hydrated magnesium silicate 0.7 parts; water 38 parts.

[0046] Preparation method of high-strength alkali-free liquid quick-setting agent

[0047] S1 Preparation of Fluoroaluminum Complex Solution

[0048] Weigh the following materials in proportion, first add water, precipitated hydrated magnesium silicate, fluorosilicate and aluminum hydroxide, after pre-dispersing for 0.5h, continue to slowly add hydrofluoric acid solution, the reaction temperature is 90-95°C, and wait for the reaction to complete Finally, the mixed solution is obtained, and the mixed solution is kept insulated at a temperature of 85 to 90° C. until the free hydrofluoric acid in the excess mixed soluti...

Embodiment 2

[0052] A high-strength alkali-free liquid quick-setting agent, comprising the following components, calculated in parts by weight:

[0053] 37 parts of aluminum sulfate; 3.5 parts of aluminum hydroxide; 7 parts of hydrofluoric acid; 8 parts of magnesium sulfate; 2.4 parts of magnesium oxide; 0.8 parts of fluorosilicate; 0.8 parts of tween-20; share.

[0054] Preparation method of high-strength alkali-free liquid quick-setting agent

[0055] S1 Preparation of Fluoroaluminum Complex Solution

[0056] Weigh the following materials in proportion, first add water, precipitated hydrated magnesium silicate, fluorosilicate and aluminum hydroxide, after pre-dispersing for 0.5h, continue to slowly add hydrofluoric acid solution, the reaction temperature is 90-95°C, and wait for the reaction to complete Finally, the mixed solution is obtained, and the mixed solution is kept insulated at a temperature of 85 to 90° C. until the free hydrofluoric acid in the excess mixed solution is fract...

Embodiment 3

[0060] A high-strength alkali-free liquid quick-setting agent, comprising the following components, calculated in parts by weight:

[0061] 37 parts of aluminum sulfate; 7 parts of aluminum hydroxide; 16 parts of hydrofluoric acid; 8 parts of magnesium sulfate; 2.4 parts of magnesium oxide; 1.2 parts of fluorosilicate; 0.8 parts of tween-20; share.

[0062] Preparation method of high-strength alkali-free liquid quick-setting agent

[0063] S1 Preparation of Fluoroaluminum Complex Solution

[0064] Weigh the following materials in proportion, first add water, precipitated hydrated magnesium silicate, fluorosilicate and aluminum hydroxide, after pre-dispersing for 0.5h, continue to slowly add hydrofluoric acid solution, the reaction temperature is 90-95°C, and wait for the reaction to complete Finally, the mixed solution is obtained, and the mixed solution is kept insulated at a temperature of 85 to 90° C. until the free hydrofluoric acid in the excess mixed solution is fracti...

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Abstract

The invention discloses a high-strength alkali-free liquid quick-setting agent, which comprises the following components, calculated by weight: 30-50 parts of aluminum sulfate; 3-8 parts of aluminum hydroxide; 5-25 parts of hydrofluoric acid; magnesium sulfate 0-20 parts; magnesium oxide 1.0-3.0 parts; fluorosilicate 0.5-3 parts; emulsifier 0.3-1.2 parts; stabilizer 0.2-1.0 parts; water 30-50 parts. The preparation method of high-strength alkali-free liquid quick-setting agent comprises the following steps, S1: prepare fluoro-aluminum complex solution, weigh the following materials in proportion, first add water, stabilizer, fluorosilicate and aluminum hydroxide, after pre-dispersion Add hydrofluoric acid solution to obtain a mixed solution after the reaction is completed, and keep the mixed solution at a temperature of 85-90°C until the free hydrofluoric acid in the redundant mixed solution is fractionated; S2: prepare an alkali-free accelerator; fractional distillation After the completion, stop the heat preservation, weigh the following materials in proportion, aluminum sulfate, magnesium sulfate and emulsifier and put them into the mixed solution, add magnesium oxide after a certain period of reaction, continue the reaction, and obtain a high-strength alkali-free accelerator after the reaction.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a high-strength alkali-free liquid quick-setting agent, a preparation method and an application thereof. Background technique [0002] Liquid accelerator is an admixture that can quickly set and harden cement or concrete. It is mainly used in wet sprayed concrete, and is widely used in high-speed rail, high-speed, subway tunnels and other engineering projects. [0003] Liquid accelerators include alkaline, low-alkali and non-alkali liquid accelerators. The main problems of alkali-based accelerators are high alkali content, large strength loss after 28 days, and strong corrosion; non-alkali (low-alkali) accelerators The main problems are large dosage, short stable period and low 1d strength. In addition, due to the large cement output in my country and the large number of production enterprises, coupled with the large differences in cement mineral composition and mixed...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B22/14C04B28/04C04B103/12
CPCC04B28/04C04B40/0039C04B2103/12C04B22/148C04B22/06C04B22/082C04B22/142C04B22/00C04B22/066C04B22/126
Inventor 古朝建张毕军付常根
Owner 四川琪汇新材料有限责任公司
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