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Concrete cement-reducing agent and preparation method thereof

A technology of glue reducing agent and concrete, applied in the field of concrete additives, can solve the problems of poor comprehensive performance of the glue reducing agent, unstable performance of admixtures, poor component compatibility, etc. The effect of improving dispersion performance

Active Publication Date: 2020-03-31
武汉奥克化学有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Most of the adhesive reducers commonly used in the prior art are compounded with organic alcohol amines and inorganic salts. This compounded admixture has the defect of unstable performance, and it is prone to poor compatibility of components under the interference of external factors. , leading to the deterioration of the overall performance of the reducer
Moreover, the existing glue reducer needs to be used in combination with the water reducer to play its role, which is inconvenient to use

Method used

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  • Concrete cement-reducing agent and preparation method thereof
  • Concrete cement-reducing agent and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0045] The present embodiment provides a kind of preparation method of concrete reducer, and it comprises the steps:

[0046] Weigh an appropriate amount of OXST-807 polyether monomer, modified ethylene glycol amine and pure water into a four-necked flask, and stir to dissolve it. OXST-807 polyether monomer accounted for 32% of the total mass of the adhesive reducer, and modified ethylene glycol amine accounted for 1.0% of the total mass of the adhesive reducer. After the monomers were completely dissolved, the oxidant ammonium persulfate was added. Hydrogen peroxide (content 30%) accounts for 0.4% of the total mass of the glue reducer, and the first solution and the second solution are added dropwise after 5 minutes.

[0047] The first solution is made up of mercaptopropionic acid, (vitamin C) VC and pure water, which are completely dissolved and stirred evenly, wherein mercaptopropionic acid accounts for 0.1% of the total mass of the adhesive reducer, and VC accounts for 0.1...

Embodiment 2

[0050] The present embodiment provides a kind of preparation method of concrete reducer, and it comprises the steps:

[0051] Weigh an appropriate amount of OXST-807 polyether monomer, modified ethylene glycol amine and pure water into a four-necked flask, and stir to dissolve it. OXST-807 polyether monomer accounts for 34% of the total weight of the glue reducer, and modified diethanolamine is 0.5%. After the monomer is completely dissolved, the oxidant ammonium persulfate is added. Ammonium persulfate accounts for 0.1% of the total mass of the glue reducer, and the first solution and the second solution are added dropwise after 5 minutes.

[0052] The first solution is made up of mercaptoethanol, D-isoascorbic acid and pure water, which are completely dissolved and stirred evenly, wherein mercaptoethanol accounts for 0.1% of the total mass of the adhesive reducer, and D-isoascorbic acid accounts for 0.08% of the total mass of the adhesive reducer. %.

[0053] The second so...

Embodiment 3

[0056] The present embodiment provides a kind of preparation method of concrete reducer, and it comprises the steps:

[0057] Weigh an appropriate amount of OXST-807 polyether monomer, modified ethylene glycol amine and pure water into a four-necked flask, and stir to dissolve it. OXST-807 polyether monomer accounts for 33% of the total weight of the glue reducer, and modified diethanolamine is 1.7%. After the monomer is completely dissolved, the oxidant potassium persulfate is added. Potassium persulfate accounts for 0.15% of the total mass of the glue reducer, and the first solution and the second solution are added dropwise after 5 minutes.

[0058] The first solution is made up of thioglycolic acid, sodium hypophosphite and pure water, which are completely dissolved and stirred evenly, wherein thioglycolic acid accounts for 0.07% of the total mass of the adhesive reducer, and sodium hypophosphite accounts for 0.15% of the total mass of the adhesive reducer. %.

[0059] T...

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Abstract

The invention discloses a concrete cement-reducing agent and a preparation method thereof, and relates to the technical field of concrete additives. The concrete cement-reducing agent comprises, by weight, 32 to 34 parts of an OXST-807 polyether monomer, 0.5 to 2 parts of modified diethanol amine, 2.5 to 3 parts of organic carboxylic acid, 0.18 to 0.31 parts of an oxidation-reduction initiator and0.05 to 0.1 parts of a chain transfer agent. According to the free radical synthesis principle, under the action of the oxidation-reduction initiator, organic carboxylic acid, modified diethanol amine and OXST-807 undergo a polymerization reaction, the polymerization degree of the polymer is controlled through the chain transfer agent, and synthesis of the concrete glue reducing agent is achieved. The concrete glue reducing agent provided by the invention is stable in performance, and the cement consumption can be reduced by 10% at most under the condition of ensuring the same concrete strength grade.

Description

technical field [0001] The invention relates to the technical field of concrete additives, in particular to a concrete glue reducer and a preparation method thereof. Background technique [0002] Concrete reducer refers to a chemical admixture that can effectively reduce the amount of cementitious materials when the water-binder ratio remains basically unchanged and the slump and 28-day compressive strength of concrete do not decrease. Its characteristic is that it can reduce the amount of cement by 5%-10% while ensuring the same concrete strength level, and ensure that the mechanical strength of the concrete does not decrease. At the same time, the working performance and volume stability of the concrete are improved to varying degrees. At present, scholars still have disputes about the mechanism of concrete reducers. Most people think that concrete synergists, as a surface dispersant, have a similar mechanism to water reducers, but concrete reducers can prevent ordinary wa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/32
CPCC04B40/0039C04B24/32C04B24/122C04B22/14C04B22/068C04B24/06C04B24/16C04B24/04C04B22/00C04B22/16C04B22/062
Inventor 朱建民董振鹏刘兆斌梁立春左国磊潘阳
Owner 武汉奥克化学有限公司
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