Super-early-strength fluoride-free alkali-free liquid accelerator and preparation method thereof

A technology of super early-strength type and quick-setting agent, which is used in the preparation of liquid quick-setting agent, super-early-strength type fluorine-free alkali-free liquid quick-setting agent, and the field of super-early-strength type fluorine-free alkali-free liquid quick-setting agent. Solve the problems of excessive alkali content, high compressive strength, and no guidance plan, and achieve the effects of low active adsorption center, improved early strength, and shortened setting time

Active Publication Date: 2021-11-05
SHIJIAZHUANG CHANGAN YUCAI BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, most of the alkali-free liquid accelerator products use industrial-grade aluminum sulfate as the main accelerator component, and the following problems generally exist: (1) The alkali content exceeds the standard
[0007] The above technologies have a great impact on how to make the ultra-early-strength fluorine

Method used

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  • Super-early-strength fluoride-free alkali-free liquid accelerator and preparation method thereof
  • Super-early-strength fluoride-free alkali-free liquid accelerator and preparation method thereof
  • Super-early-strength fluoride-free alkali-free liquid accelerator and preparation method thereof

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Embodiment 1

[0022] Embodiment 1: The ultra-early-strength type fluorine-free and alkali-free liquid quick-setting agent of the present invention is made of the raw materials of the following components and mass percentages: 60% aluminum sulfate, 7.5% organic solubilizer, 1.0% stable agent, 2.0% early strength agent, 0.5% pH regulator, the balance is water, the sum of the mass percentages of the above components is 100%. The above-mentioned aluminum sulfate is industrial-grade aluminum sulfate octadecahydrate with an alumina content of 16.2%. The above-mentioned organic solubilizer is formed by mixing (stirring evenly) the three components of component A, component B and component C in a mass ratio of 2:2:1, wherein component A is diethanolamine, component B It is N,N-dimethylformamide, and component C is triethylenetetramine. The stabilizer is superfine sepiolite, the pH regulator is p-toluenesulfonic acid, and the early strengthening agent is lithium sulfate.

[0023] The preparation m...

Embodiment 2

[0024] Embodiment 2: The ultra-early-strength type fluorine-free and alkali-free liquid quick-setting agent of the present invention is made of the raw materials of the following components and mass percentages: 62% aluminum sulfate, 8.5% organic solubilizer, 1.5% stable agent, 1.5% early strength agent, 0.5% pH regulator, the balance is water, the sum of the mass percentages of the above components is 100%. The above-mentioned aluminum sulfate is industrial-grade aluminum sulfate octadecahydrate with an alumina content of 16.5%. The above-mentioned organic solubilizer is formed by mixing (stirring evenly) the three components of A component, B component and C component in a mass ratio of 2.5:2.5:1, wherein A component is triethanolamine, and B component It is N-methyldiethanolamine, and component C is triethylenetetramine; the stabilizer is pseudoboehmite, the pH regulator is oxalic acid, and the early strength agent is nano-silica sol.

[0025] The preparation method of the...

Embodiment 3

[0026] Embodiment 3: The ultra-early-strength type fluorine-free and alkali-free liquid quick-setting agent of the present invention is made of the raw materials of the following components and mass percentages: 62% aluminum sulfate, 10% organic solubilizer, 1.0% stable agent, 1.5% early strength agent, 1.0% pH regulator, and the balance is water, the sum of the mass percentages of the above components is 100%. The above-mentioned aluminum sulfate is industrial-grade aluminum sulfate octadecahydrate with an alumina content of 16.5%. The above-mentioned organic solubilizer is formed by mixing (stirring evenly) the three components of component A, component B and component C in a mass ratio of 3:3:1, wherein component A is monoethanolamine, and component B It is N,N-dimethylethanolamine, and component C is diethylenetriamine; the stabilizer is ultrafine sepiolite, the pH regulator is formic acid, and the early strength agent is nano-aluminum sol.

[0027] The preparation method...

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Abstract

The invention relates to a super-early-strength fluorine-free alkali-free liquid accelerator and a preparation method thereof. The accelerator is prepared from the following raw materials: aluminum sulfate, an organic dissolution promoter, a stabilizer, an early strength agent, a pH regulator and water. The organic dissolution promoter is formed by mixing a component A, a component B and a component C, wherein the component A is monoethanolamine, diethanolamine or triethanolamine; the component B is N-methyldiethanolamine, N,N-dimethylethanolamine or N,N-dimethylformamide; and the component C is diethylenetriamine, triethylene tetramine or tetrahydroxypropyl ethylenediamine. The stabilizer is selected from superfine sepiolite and pseudo-boehmite. The pH regulator is selected from p-toluenesulfonic acid, oxalic acid and formic acid. The early strength agent is selected from lithium sulfate, magnesium sulfate, nanometer silica sol and nanometer aluminum sol. The super-early-strength fluorine-free alkali-free liquid accelerator is good in performance, simple in preparation process, free of fluorine, alkali and chlorine and capable of meeting the performance requirements of various setting accelerator standards for alkali-free accelerators; and according to the liquid accelerator, compressive strength within 6 hours is far larger than 2.5 MPa, compressive strength within 1 day is far larger than 15.0 MPa, a compressive strength retention rate within 90 days is larger than or equal to 110%, and stability exceeds 9 months.

Description

technical field [0001] The invention relates to a liquid quick-setting agent, in particular to a super-early-strength type fluorine-free and alkali-free liquid quick-setting agent, which belongs to the technical field of building materials. The present invention also relates to a preparation method of the liquid quick-setting agent, in particular to a preparation method of a super-early-strength type fluorine-free and alkali-free liquid quick-setting agent. Background technique [0002] Shotcrete plays an increasingly important role in my country's infrastructure construction and urban construction projects, and its consumption is increasing. Especially in the process of high-speed railway and highway construction, there are more and more tunnel construction projects, which put forward higher and higher requirements for the performance of shotcrete. The Ya'an-Nyingchi section of the Sichuan-Tibet Railway is about 1,011 kilometers long. The construction of the "two tunnels a...

Claims

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Application Information

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IPC IPC(8): C04B24/20C04B24/12C04B103/12
CPCC04B40/0039C04B2103/12C04B22/148C04B24/122C04B24/124C04B24/121C04B14/042C04B24/20C04B22/147C04B14/303C04B24/04C04B14/062Y02W30/91
Inventor 赵明敏田遥滕文生黄玉美王玉乾李茜茜董树强王龙飞连彦丽刘旭飞
Owner SHIJIAZHUANG CHANGAN YUCAI BUILDING MATERIALS
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