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Preparation method of high-aluminum content, alkali-free and chlorine-free setting accelerator

A technology of accelerator and content, applied in the field of concrete admixtures, can solve problems such as low aluminum content, and achieve the effect of increasing content, promoting hydration, and improving quantitative absorption

Active Publication Date: 2019-02-15
ZHENJIANG SOBUTE NEW MATERIAL CO LTD +1
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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 alkali-free accelerator with low aluminum content, the invention provides a method for preparing a high-aluminum content alkali-free and chlorine-free accelerator

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] The preparation of alkali-free and chlorine-free quick-setting agent with high aluminum content comprises the following steps:

[0034] (1) Mix 10g of 2-acrylamide-2-methylpropanesulfonic acid, 1g of acrylamide, 20g of acrylic acid, 1g of ammonium persulfate, 1g of N,N'-methylenebisacrylamide and 67g of water to obtain the aqueous phase ; mix 99.6g cyclohexane and 0.4g sorbitan oleate to obtain the oil phase; heat the oil phase to 50~70°C, add the water phase dropwise, control the dropping time for 30min, polymerize for 10h and then filter and dry to obtain Solubilizer;

[0035] (2) Mix 60g of aluminum sulfate, 0.5g of solubilizer and 13g of water, let it stand for 1h, continue to add 5g of diethanolamine, 0.5g of phosphoric acid and 21g of rheological agent, then heat to 60°C for 6h, and cool to room temperature to obtain Alkali-free and chlorine-free accelerator with high aluminum content.

Embodiment 2

[0037] The preparation of alkali-free and chlorine-free quick-setting agent with high aluminum content comprises the following steps:

[0038] (1) Mix 15g of 2-acrylamide-2-methylpropanesulfonic acid, 5g of acrylamide, 30g of acrylic acid, 2g of ammonium persulfate, 3g of N,N'-methylene bisacrylamide and 45g of water to obtain the aqueous phase ;Mix 98.5g cyclohexane and 1.5g sorbitan oleate to obtain the oil phase; heat the oil phase to 70°C, add the water phase dropwise, control the dropping time for 60min, polymerize for 5h, filter and dry to obtain the solubilizer ;

[0039] (2) Mix 65g of aluminum sulfate, 2g of solubilizer and 9g of water, let it stand for 1h, continue to add 10g of triethanolamine, 3g of oxalic acid and 11g of rheological agent, then heat to 80°C for 3h, cool to room temperature to obtain high alumina Content non-alkali and chlorine-free accelerator.

Embodiment 3

[0041] The preparation of alkali-free and chlorine-free quick-setting agent with high aluminum content comprises the following steps:

[0042] (1) Mix 12g of 2-acrylamide-2-methylpropanesulfonic acid, 3g of acrylamide, 25g of acrylic acid, 1.5g of ammonium persulfate, 2g of N,N'-methylenebisacrylamide and 56.5g of water to obtain Water phase; mix 99g of cyclohexane and 1g of sorbitan oleate to obtain an oil phase; heat the oil phase to 70°C, add the water phase dropwise, control the dropping time for 40 minutes, and filter and dry after 8 hours of polymerization to obtain a solubilizer ;

[0043] (2) Mix 64g of aluminum sulfate, 2g of solubilizer and 10g of water, let it stand for 1h, continue to add 10g of triethanolamine, 3g of lactic acid and 21g of rheological agent, then heat to 80°C for 3h, cool to room temperature to obtain high aluminum Content non-alkali and chlorine-free accelerator.

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PUM

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Abstract

The invention discloses a preparation method of a high-aluminum content, alkali-free and chlorine-free setting accelerator. The preparation method comprises the following steps: (1), uniformly mixing2-acrylamide-2-methylpropanesulfonic acid, acrylamide, acrylic acid, sodium hydroxide, an initiator, a crosslinking agent with water to obtain an aqueous phase; uniformly mixing cyclohexane with sorbitan oleate to obtain an oil phase; heating the oil phase to 50-70 DEG C, then dropwise adding the aqueous phase, performing a polymerization reaction for 5-10 hours, then filtering and drying to obtain a dissolution promoter; (2), uniformly mixing aluminum sulfate, the dissolution promoter with water, standing still for 1 h, continuing to add alcohol amine, a pH regulator and a rheological agent,then heating to 60-80 DEG C, reacting for 3-6 h, and cooling to room temperature to obtain the high-aluminum content, alkali-free and chlorine-free setting accelerator. According to the preparation method, through use of the dissolution promoter, the content of the aluminum sulfate is increased; the alkali-free ad chlorine-free setting accelerator prepared through modification can greatly improvethe 1d compressive strength of cement mortar and can improve comprehensive performance, such as the stability and the like, of a product.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, in particular to a preparation method of a high-aluminum-content alkali-free and chlorine-free accelerator. 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 processe...

Claims

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Application Information

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IPC IPC(8): C04B24/26C08F220/06C08F220/56C08F220/58C08F222/38C04B103/12
CPCC04B40/0039C08F220/06C04B2103/12C04B22/148C04B24/122C04B24/06C04B22/165C04B24/2652C04B22/00C04B24/163C08F220/56C08F220/585C08F222/385
Inventor 张小磊乔敏王伟张茜冉千平刘加平
Owner ZHENJIANG SOBUTE NEW MATERIAL CO LTD
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