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Preparation method of stable alkali-free setting accelerator

A technology of quick-setting agent and stable type, applied in the field of preparation of stable alkali-free setting accelerator, can solve the problems of poor stability of alkali-free liquid quick-setting agent, prolonged setting time, easy hydrolysis, etc., so as to improve setting time. , good stability, not easy to hydrolyze the effect

Active Publication Date: 2017-03-15
江苏宇辉新材料集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention: in view of the poor stability of the aluminum sulfate series alkali-free liquid quick-setting agents, which are prone to hydrolysis and form a gel, prolonging the problem of setting time, the present invention first pastes the black fungus chaff powder After chemical treatment, mix and heat with acrylic acid monomer, ammonium persulfate and other substances to obtain fungus chaff water-absorbent resin, then mix and grind it with gelatin gel liquid prepared from gelatin to obtain mixed water-absorbent resin powder, and then Mix and press with calcium carbonate powder and ball mill to obtain calcium carbonate resin composite powder, then use aluminum sulfate and benzylamine as raw materials to prepare organic amine dispersion liquid, and finally heat it with calcium carbonate resin composite powder and other substances and then cool it can

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0018] First collect the black fungus bran, dry it naturally at 60°C for 8 hours, then grind and pass through a 110-mesh sieve to collect the black fungus bran powder, and then mix the black fungus bran with a mass ratio of 1:10 Stir and mix the powder with deionized water, and gelatinize at 60°C for 10 minutes; after the gelatinization is completed, collect the gelatinized matter, and weigh 50 parts of acrylic acid monomer, 5 parts of ammonium persulfate, and 8 parts by weight, respectively. 1 part of acrylamide, 15 parts of gelatinized product and 5 parts of N,N'-methylenebisacrylamide were placed in a three-necked flask, heated in a water bath at 80°C for 4 hours, then filtered to collect the filter cake, and washed with absolute ethanol After 5 times, dry at 80°C for 8 hours to prepare the fungus chaff water-absorbing resin; then mix the gelatin and deionized water at a mass ratio of 1:10, heat in a water bath at 60°C for 50 minutes, then filter and collect the filtrate, an...

example 2

[0021]First collect the black fungus bran, dry it naturally, dry it at 55°C for 6 hours, then grind it and pass it through a 100-mesh sieve to collect the black fungus bran powder, then mix the black fungus bran powder according to the mass ratio of 1:10 Stir and mix the powder with deionized water, and gelatinize at 55°C for 5 minutes; after the gelatinization is completed, collect the gelatinized matter, and weigh 45 parts of acrylic acid monomer, 3 parts of ammonium persulfate, and 5 parts by weight, respectively. 1 part of acrylamide, 10 parts of gelatinized product and 3 parts of N,N'-methylenebisacrylamide were placed in a three-necked flask, heated in a water bath at 78°C for 3 hours, then filtered to collect the filter cake, and washed with absolute ethanol After 3 times, dry at 75°C for 6 hours to prepare the fungus chaff water-absorbing resin; then mix the gelatin and deionized water at a mass ratio of 1:10, heat in a water bath at 55°C for 45 minutes, then filter and...

example 3

[0024] First collect the black fungus bran, dry it naturally at 57°C for 7 hours, then grind and pass through a 105-mesh sieve to collect the black fungus bran powder, then mix the black fungus bran with a mass ratio of 1:10 Stir and mix the powder with deionized water, and gelatinize at 57°C for 7 minutes; after the gelatinization is completed, collect the gelatinized matter, and weigh 47 parts of acrylic acid monomer, 4 parts of ammonium persulfate, and 6 parts by weight, respectively. 1 part of acrylamide, 12 parts of gelatinized product and 4 parts of N,N'-methylenebisacrylamide were placed in a three-necked flask, heated in a water bath at 79°C for 3 hours, then filtered to collect the filter cake, and washed with absolute ethanol After 4 times, dry at 77°C for 7 hours to prepare the fungus chaff water-absorbing resin; then mix the gelatin and deionized water at a mass ratio of 1:10, heat in a water bath at 57°C for 47 minutes, then filter and collect the filtrate, and Th...

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Abstract

Belonging to the technical field of concrete additive preparation, the invention relates to a preparation method of a stable alkali-free setting accelerator. The method includes: firstly conducting gelatinization treatment on black fungus chaff powder, them performing mixing heating with an acrylic monomer, ammonium persulfate and other substances to obtain fungus chaff water-absorbent resin, then subjecting the fungus chaff water-absorbent resin and a self-made gelatin gel solution to mixing grinding so as to obtain mixed water-absorbent resin powder, then subjecting the mixed water-absorbent resin powder and calcium carbonate powder to mixing pressing, and performing ball milling to obtain calcium carbonate resin composite powder, then using aluminum sulfate and benzylamine as the raw materials to prepare an organic amine dispersion solution, and finally heating the organic amine dispersion solution, calcium carbonate resin composite powder and other substances, and then performing cooling. The stable alkali-free setting accelerator prepared by the method provided by the invention has good stability, does not hydrolyze easily, enhances the setting time to a initial setting time of less than 2min and a final setting time of less than 4min, is free of alkali component, does not cause harm to human body, also is environment-friendly, and improves the concrete strength, thus being widely applicable to bridges, underground engineering and other fields.

Description

technical field [0001] The invention relates to a preparation method of a stable alkali-free accelerator, which belongs to the technical field of concrete additive preparation. Background technique [0002] The effect of the accelerator in concrete depends on the chemical composition and dosage of the accelerator, the mineral composition and content of cement, the type and content of gypsum, the type and amount of mineral admixtures, and the temperature during construction, etc. factors. The accelerating mechanism of accelerators on cement usually includes the following three types: (1) hydration products are formed through the reaction of their own components and components in cement; (2) promoting the C in cement 3 Hydration of A mineral; (3) Promote C in cement 3 The hydration of S minerals and the accelerators of different qualities have emphasis on or both of the three accelerating mechanisms. Commonly used accelerators can be divided into powder and liquid in form. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/42C04B28/00C04B103/12
CPCC04B28/00C04B40/0039C04B2103/12C04B2201/50C04B2103/0051C04B14/28C04B22/148C04B24/121C04B22/06C04B24/42C04B14/06C04B22/002
Inventor 高玉梅薛荣飞蒋玉芳
Owner 江苏宇辉新材料集团有限公司
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