High-stability alkali-free chloride-free liquid accelerator and preparation method thereof

A liquid accelerator and stable technology, applied in the field of highly stable non-alkali and chlorine-free liquid accelerator and its preparation, can solve the problems of large strength loss, poor stability, and strong corrosion in the later period, and achieve long storage time , good stability and high adaptability

Active Publication Date: 2017-01-18
唐山市龙亿科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the powder accelerator and the alkaline liquid accelerator have the disadvantages of large dust in the working environment, strong corrosion, large rebound, large loss of strength in the later stage, and poor durability, while the non-alkali liquid accelerator does not have these defects.
[0004] The patent document with the publication number CN102992677A discloses a non-alkali liquid quick-setting agent, which uses aluminum sulfate as the quick-setting component, and organic amines and polyols as stabilizers, but its stabilizing component dosage is relatively large, which affects the early strength. The negative impact is great, and it does not contain other stabilizing aids, and the stability of the accelerator is also poor
Similarly, in the quick-setting agents disclosed in the patent documents with publication numbers CN104370489A, CN104446090A, CN103664034A, and CN103553406A, about 6-10% of alcohol amines have been added, which will also have a relatively large negative impact on the early strength.
Publication No. CN104891852A discloses only about 2% alcohol amine subs

Method used

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  • High-stability alkali-free chloride-free liquid accelerator and preparation method thereof
  • High-stability alkali-free chloride-free liquid accelerator and preparation method thereof

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Embodiment 1

[0028] Preferred embodiment 1 of the present invention provides a highly stable alkali-free and chlorine-free liquid quick-setting agent, which is composed of the following raw material components in parts by weight: 47 parts of aluminum sulfate octadecahydrate, 3.5 parts of sodium fluoride, 44.2 parts of deionized water 1 part, 1 part of Tween-20, 0.5 part of 18-crown-6 and 2 parts of hydroxyethylidene diphosphate, 0.2 part of aqueous solution of polyacrylamide (molecular weight 5 million), 0.6 part of diethanolamine, 1 part of 85% phosphoric acid.

[0029] At the same time, this embodiment also provides the preparation method of the above-mentioned highly stable alkali-free and chlorine-free liquid accelerator, specifically: at 75°C, first dissolve 47 parts of aluminum sulfate octadecahydrate and 3.5 parts of sodium fluoride in 44.2 parts of In ionized water, after dissolving completely, add 1 part of Tween-20, stir for 0.5 hours, then add 0.5 parts of 18-crown-6 and 2 parts ...

Embodiment 2

[0031] Preferred embodiment 2 of the present invention provides a highly stable alkali-free and chlorine-free liquid quick-setting agent, which is composed of the following raw material components in parts by weight: 50 parts of aluminum sulfate octadecahydrate, 5 parts of magnesium sulfate, and 35.3 parts of deionized water , 2 parts of Tween-80, 62 parts of 18-crown-62 parts, 3 parts of aminotrimethylene phosphonic acid, 0.4 parts of polyacrylamide (8 million molecular weight) aqueous solution, 0.8 parts of triethanolamine, and 1.5 parts of p-toluenesulfonic acid.

[0032] At the same time, this embodiment also provides the preparation method of the above-mentioned highly stable alkali-free and chlorine-free liquid quick-setting agent, specifically: at 80°C, first dissolve 50 parts of aluminum sulfate octadecahydrate and 5 parts of magnesium sulfate in 35.3 parts of deionized In water, after dissolving completely, add 2 parts of Tween-80, stir and react for 1 hour, then add 2...

Embodiment 3

[0034] Preferred embodiment 3 of the present invention provides a highly stable alkali-free and chlorine-free liquid quick-setting agent, which is composed of the following raw material components in parts by weight: 55 parts of aluminum sulfate octadecahydrate, 6 parts of ferrous sulfate, 30.15 parts of deionized water 1 part, 1 part of Tween-20, 1 part of Tween-80, 1 part of hydroxyethylidene diphosphate, 3 parts of aminotrimethylene phosphonic acid, 0.6 part of aqueous solution of polyacrylamide (molecular weight 10 million), 0.6 part of aqueous solution of polyacrylamide (molecular weight 10 million), diethanol monoisopropyl 1 part of alcohol amine, 1.25 parts of p-toluenesulfonic acid.

[0035] At the same time, this embodiment also provides the preparation method of the above-mentioned highly stable alkali-free and chlorine-free liquid quick-setting agent, specifically: at 85°C, first dissolve 55 parts of aluminum sulfate octadecahydrate and 6 parts of ferrous sulfate in ...

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Abstract

The invention provides a high-stability alkali-free chloride-free liquid accelerator and a preparation method thereof. the preparation method comprises the following specific steps: dissolving 47-55 parts of a quick-setting component and 3.5-6 parts of an inorganic early-strength component into 27.9-44.2 parts of deionized water at 75-90 DEG C, adding 1-3 parts of a solubilizing component, stirring and reacting for 0.5-1 h, adding 2.5-5 parts of a complexing component, stirring and reacting for 1.5-2.5 h, adding 0.2-0.6 part of an aqueous solution of a thickening component and 0.6-1 part of an organic early-strength component, stirring for 15-30 min, cooling to 50-60 DEG C, adding 1-1.5 parts of a pH regulation component, and stirring for 15-30 min so as to obtain the high-stability alkali-free chloride-free liquid accelerator. The prepared accelerator product has advantages of no corrosiveness or pungent smell, good cement adaptability, low mixing amount, short setting time, high early strength, no loss of long-term strength and good stability under the condition of minus 15-30 DEG C.

Description

technical field [0001] The invention belongs to the concrete quick-setting agent in the field of building materials, in particular to a highly stable alkali-free and chlorine-free liquid quick-setting agent and a preparation method thereof. Background technique [0002] With the development of my country's high-speed rail, highway and subway and other infrastructure industries, and limited by my country's landform characteristics, there are more tunnel constructions for high-speed rail and highways in the central and western regions, so the demand for shotcrete is also increasing year by year. Concrete accelerator is an essential part of shotcrete, and its effect directly affects the spray quality of shotcrete. The technical level of shotcrete is mainly reflected in the research and application of accelerators. Therefore, the research on sprayed concrete admixture materials both at home and abroad puts the accelerator in a very important position. [0003] Accelerators for...

Claims

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Application Information

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IPC IPC(8): C04B24/32C04B103/12
CPCC04B40/0039C04B2103/12C04B22/148C04B22/126C04B24/32C04B24/02C04B24/003C04B24/2652C04B24/122C04B22/165C04B22/142C04B24/20C04B22/149
Inventor 魏中原逄建军
Owner 唐山市龙亿科技开发有限公司
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