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Low-resilience alkali-free liquid accelerator and preparation method thereof

A low-rebound, accelerator technology, applied in the field of building concrete admixtures, can solve the problems of low compressive strength in the early stage, containing toxic substances, and complicated preparation process of alkali-free accelerators, so as to improve the compressive strength and Stability, simple preparation method, and the effect of being beneficial to large-scale industrial production and application

Active Publication Date: 2020-11-17
WUHAN YUANJIN BUILDING MATERIALS TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a low-resilience alkali-free liquid accelerator and its preparation method, which is used to solve the problems of complex preparation process, poisonous substances, and low early compressive strength of the alkali-free accelerator in the prior art. series of questions

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  • Low-resilience alkali-free liquid accelerator and preparation method thereof
  • Low-resilience alkali-free liquid accelerator and preparation method thereof
  • Low-resilience alkali-free liquid accelerator and preparation method thereof

Examples

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Embodiment 1

[0028] In this embodiment, in terms of mass percentage, the raw materials of the low-resilience alkali-free liquid accelerator are composed of: 55% aluminum sulfate octadecahydrate, 6% aluminum dihydrogen phosphate, 12% diethanolamine, 1% triethanolamine, 1% sodium citrate, 0.5% composite enhancer, 2% phosphoric acid and 22.5% water.

[0029] In this example, the specific synthesis steps of the quick-setting agent are as follows: add water, sodium citrate and composite reinforcing agent to the reaction pot in sequence, start stirring, adjust the speed to 300r / min, start heating, set the temperature at 50°C, When the solution in the reaction pot is colorless and transparent, add aluminum sulfate octadecahydrate and aluminum dihydrogen phosphate to the reaction pot in turn, and continue to stir at this temperature for 1 hour, then slowly add diethanolamine and triethanolamine to the In the reaction pot, and continue to stir at this temperature for 1.5h, finally add phosphoric ac...

Embodiment 2

[0031] In this embodiment, in terms of mass percentage, the raw materials of the low-rebound alkali-free liquid accelerator are composed of: 53% aluminum sulfate octadecahydrate, 6% aluminum dihydrogen phosphate, 10% diethanolamine, 1% triethanolamine, 2% vitamin C, 0.6% complex enhancer, 2% phosphoric acid and 25.4% water.

[0032] In this example, the specific synthesis steps of the quick-setting agent are as follows: add water, vitamin C and composite enhancer to the reaction pot in sequence, start stirring, adjust the speed to 200r / min, start heating, set the temperature at 50°C, and wait for When the solution in the reaction pot is colorless and transparent, add aluminum sulfate octadecahydrate and aluminum dihydrogen phosphate to the reaction pot in turn, and continue stirring at this temperature for 1 hour, then slowly add diethanolamine and triethanolamine to the reaction pot pot, and continue to stir at this temperature for 1.5 hours, and finally add phosphoric acid t...

Embodiment 3

[0034] In this embodiment, in terms of mass percentage, the raw materials of the low-resilience alkali-free liquid accelerator are as follows: 55% aluminum sulfate octadecahydrate, 4% aluminum dihydrogen phosphate, 1% ethanolamine, 10% diethanolamine, 0.5 % triethanolamine, 1% vitamin C, 0.8% complex enhancer, 3% phosphoric acid and 24.7% water.

[0035] In this example, the specific synthesis steps of the quick-setting agent are as follows: add water, vitamin C and composite enhancer to the reaction pot in sequence, start stirring, adjust the speed to 200r / min, start heating, set the temperature at 50°C, and wait for When the solution in the reaction pot is colorless and transparent, add aluminum sulfate octadecahydrate and aluminum dihydrogen phosphate to the reaction pot in turn, and continue stirring at this temperature for 1 hour, then slowly add ethanolamine, diethanolamine and triethanolamine into the reaction pot, and continue to stir at this temperature for 1.5 hours,...

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Abstract

The invention discloses a low-resilience alkali-free liquid accelerator and a preparation method thereof. The low-resilience alkali-free liquid accelerator is prepared by mixing the following raw materials by mass: 50%-55% of aluminum sulfate octadecahydrate, 4%-6% of aluminum dihydrogen phosphate, 10%-13% of an organic alcohol amine compound, 0.5%-2% of a stabilizer, 0.5%-1% of a composite enhancer, and 1%-3% of a pH regulator, with the balance being water. According to the low-resilience alkali-free liquid accelerator and the preparation method thereof, aluminum sulfate octadecahydrate and aluminum dihydrogen phosphate are mainly used as organic coagulation accelerating components; through the complexing action of organic alcohol amines, the use of the pH regulator and the synergistic effect of the composite enhancer, the low-resilience alkali-free liquid accelerator has excellent coagulation speed, and the compressive strength and the stability of the liquid accelerator after the application are also obviously improved; and meanwhile, the preparation method is simple in process, free of usage of toxic raw materials and beneficial to large-scale industrial production and application.

Description

technical field [0001] The invention relates to the field of building concrete admixtures, in particular to a low-rebound alkali-free liquid quick-setting agent and a preparation method thereof. Background technique [0002] Alkali-free liquid accelerator is an admixture that can make cement-related products quickly lose their plasticity and gradually harden. It is widely used in sprayed concrete wet spraying construction. It is a support project such as mine mining, slope support, and tunnel excavation. One of the indispensable admixtures, it has been applied in spraying construction projects in many countries such as Canada, Sweden, Italy and Japan. Compared with the dry spraying construction process, the wet spraying process has less construction dust and is The health hazards of construction personnel are small, the concrete quality is good, and it is green and environmentally friendly. However, it is limited by the different coagulation-accelerating mechanism from the a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/38C04B103/12
CPCC04B40/0039C04B2103/12C04B22/148C04B22/16C04B24/122C04B24/06C04B22/165C04B24/124C04B22/14C04B24/383C04B24/38Y02W30/91
Inventor 白东魏凯汪源陈延胜黄思远纪宪坤苑立东
Owner WUHAN YUANJIN BUILDING MATERIALS TECH CO LTD