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A kind of hybrid type alkali-free accelerator and preparation method thereof

A hybrid type, accelerator technology, applied in the field of concrete admixtures, can solve the problems of short service life of alkali-free accelerators, and achieve the effects of shortening setting time, long service life and improving hydration rate

Active Publication Date: 2021-11-09
JIANGSU SOBUTE NEW MATERIALS +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the shortcomings of the existing non-alkali quick-setting agent such as short service life, the invention provides a preparation method of a hybrid type non-alkali quick-setting agent

Method used

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  • A kind of hybrid type alkali-free accelerator and preparation method thereof
  • A kind of hybrid type alkali-free accelerator and preparation method thereof
  • A kind of hybrid type alkali-free accelerator and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The preparation of hybrid type non-alkali quick-setting agent comprises the following steps:

[0030] (1) Add 4.9g of 200-300mesh aluminum sulfate and 0.1g of 200-300mesh aluminum hydroxide to 90g of 95wt% ethanol aqueous solution, and then ultrasonically disperse for 1h to obtain a uniformly dispersed suspension; then add 5g of 1wt% Completely hydrolyzed γ-(2,3-epoxypropoxy)propyltrimethoxysilane ethanol solution; under nitrogen protection, stirred and reacted at 80°C for 24h, then centrifuged, washed with ethanol for 3 times, and finally Inorganic component A was obtained by vacuum drying at 60°C.

[0031] (2) Mix 10g of dimethyl diallyl ammonium chloride, 1g of 2-acrylamide-2-methylpropanesulfonic acid, 0.5g of tris-(dimethylaminomethyl)phenol, 25g of acrylic acid and 63g of water uniform, then add 0.41g ammonium persulfate and 0.09g sodium bisulfite and mix uniformly to obtain organic component B.

[0032] (3) Mix 45g of inorganic component A, 5g of diethanolamine...

Embodiment 2

[0034] The preparation of hybrid type non-alkali quick-setting agent comprises the following steps:

[0035] (1) Add 4g of 200-300 mesh aluminum sulfate and 1g of 200-300 mesh aluminum hydroxide to 95g of 95wt% ethanol aqueous solution, and then ultrasonically disperse for 1 hour to obtain a uniformly dispersed suspension; then add 4g of 3wt% complete Hydrolyzed γ-(2,3-glycidoxypropoxy)propyltrimethoxysilane ethanol solution; under nitrogen protection, stirred at 80°C for 24h, then centrifuged, washed with ethanol for 3 times, and finally 60°C Dry under vacuum to obtain the inorganic component A.

[0036] (2) Mix 15g dimethyl diallyl ammonium chloride, 5g 2-acrylamide-2-methylpropanesulfonic acid, 2.5g tris-(dimethylaminomethyl)phenol, 20g acrylic acid and 56g water uniform, then add 1.392g potassium persulfate and 0.108g sodium bisulfite and mix uniformly to obtain organic component B.

[0037] (3) Mix 50g of inorganic component A, 10g of triethanolamine, 3g of oxalic acid ...

Embodiment 3

[0039] The preparation of hybrid type non-alkali quick-setting agent comprises the following steps:

[0040] (1) Add 4.8g of 200-300 mesh aluminum sulfate and 0.2g of 200-300 mesh aluminum hydroxide to 90g of 95wt% ethanol aqueous solution, and then ultrasonically disperse for 1 hour to obtain a uniformly dispersed suspension; then add 5g of 2wt% Completely hydrolyzed γ-(2,3-epoxypropoxy)propyltrimethoxysilane ethanol solution; under nitrogen protection, stirred and reacted at 80°C for 24h, then centrifuged, washed with ethanol for 3 times, and finally Inorganic component A was obtained by vacuum drying at 60°C.

[0041] (2) Mix 12g dimethyl diallyl ammonium chloride, 3g 2-acrylamide-2-methylpropanesulfonic acid, 1g tris-(dimethylaminomethyl)phenol, 22g acrylic acid and 61g water , Then add 0.9g sodium persulfate and 0.1g sodium bisulfite and mix uniformly to obtain organic component B.

[0042] (3) Mix 50g of inorganic component A, 10g of triethanolamine, 3g of lactic acid ...

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Abstract

The invention discloses a hybrid type alkali-free accelerator and a preparation method thereof. The alkali-free quick-setting agent of the present invention is made up of following each component: 45-55% inorganic component A, 5-10% alcohol amine, 1-3% organic acid, 10-15% organic component B, balance It is water; the inorganic component A is prepared from 200~300 mesh aluminum sulfate, 200~300 mesh aluminum hydroxide, silane coupling agent solution, and 95wt% ethanol aqueous solution; the organic component B is prepared from dimethyl Prepared from diallyl ammonium chloride, tris-(dimethylaminomethyl)phenol, 2-acrylamide-2-methylpropanesulfonic acid, acrylic acid, redox initiator and water. The product of the invention has long service life and good construction performance; the introduced organic components have high charge density and suitable molecular weight, and can bond and precipitate with calcium ions in cement, thereby promoting the consumption of gypsum and increasing C 3 The hydration rate of A shortens the setting time of the product.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, in particular to a hybrid type alkali-free accelerator and a preparation method thereof. Background technique [0002] Accelerator is a concrete admixture that makes cement or concrete set and harden quickly. Its main function is to increase the thickness of the first spraying of shotcrete, shorten the interval between the second spraying, and improve the early strength of concrete at the same time, so as to provide support resistance in time. It has been widely used in modern underground engineering, mining engineering, plugging and emergency rescue Wait for the project. [0003] Alkali-free accelerators have little effect on the strength of concrete in the later stage, and are becoming the main direction of accelerator development. Alkali-free accelerators with aluminum sulfate as the main component are easy to obtain raw materials and simple preparation processes. The main resear...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/42C04B103/12
CPCC04B40/0039C04B2103/12C04B22/148C04B22/06C04B24/026C04B24/42C04B24/005C04B24/16C04B24/121C04B24/04C04B22/147C04B24/122C04B24/06
Inventor 张小磊乔敏王伟洪锦祥冉千平张茜
Owner JIANGSU SOBUTE NEW MATERIALS
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