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Modification water reduction agent for concrete

A water-reducing agent and concrete technology, applied in the field of water-reducing agents, can solve the problems of high viscosity and difficult mixing of the water-reducing agent, and achieve the effects of shortening the setting time, improving the laying, and improving the water-reducing rate.

Inactive Publication Date: 2019-11-01
江苏博思通新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to make up for the deficiencies of the prior art, and to provide a modified water reducer for concrete, which has the advantages of good mixing efficiency and performance, and solves the problem that the water reducer is too viscous and difficult to mix.

Method used

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  • Modification water reduction agent for concrete

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preparation example Construction

[0033] Further, the preparation method includes the following steps:

[0034] S1, adding β-naphthalene sulfonate sodium wastewater, polyvinylpyrrolidone and dodecylpyridinium bromide to the reactor for stirring;

[0035] S2: After stirring evenly, add acrylic acid, deionized water and benzoyl peroxide, heat up to 70 degrees and stir for 1 hour to obtain a sodium naphthalene sulfonate wastewater mixture;

[0036] S3, add methallyl polyoxyethylene ether, sulfite, 30% hydrogen peroxide and deionized water to the mixed solution, raise the temperature of the solution to 80 degrees, keep the solution warm and stir at a constant speed, the stirring time is 1h;

[0037] S4: Reduce the temperature of the mixture in the reactor to 50-60 degrees Celsius, and add water, modifier, viscosity modifier, early strength agent and air-entraining agent;

[0038] S5, keeping the temperature in the reaction kettle constant, stirring at a constant speed for 2 hours, and evacuating the reaction kettle to extr...

Embodiment 1

[0040] S1, adding 30 parts of methallyl polyoxyethylene ether, 10 parts of sulfite, 3 parts of 30% hydrogen peroxide and deionized water into the 25β-naphthalene sulfonate sodium wastewater mixture to raise the temperature of the solution to 80 degrees, Heat the solution and stir at a constant speed, the stirring time is 1h;

[0041] S2, reduce the temperature of the mixture in the reaction kettle to 50-60 degrees Celsius, add an appropriate amount of water, 4 parts of modifier, 5 parts of viscosity modifier, 7 parts of early strength agent and 8 parts of air-entraining agent;

[0042] S3, keeping the temperature in the reaction kettle constant, stirring at a constant speed for 2 hours, and evacuating the reaction kettle to extract excess water during the reaction process.

Embodiment 2

[0044] S1, adding 40 parts of methallyl polyoxyethylene ether, 15 parts of sulfite, 3 parts of 30% hydrogen peroxide and deionized water into the 30β-naphthalene sulfonate sodium wastewater mixture to raise the temperature of the solution to 80 degrees, Heat the solution and stir at a constant speed, the stirring time is 1.2h;

[0045] S2: Reduce the temperature of the mixture in the reaction kettle to 50-60 degrees Celsius, add an appropriate amount of water, 6 parts of modifier, 7 parts of viscosity modifier, 8 parts of early strength agent and 9 parts of air-entraining agent;

[0046] S3, keeping the temperature in the reaction kettle constant, stirring at a constant speed for 2 hours, and evacuating the reaction kettle to extract excess water during the reaction process.

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Abstract

The invention discloses a modification water reduction agent for concrete and relates to the technical field of water reduction agent. The modification water reduction agent comprises the following components in parts by mass: 30-50 parts of methyl allyl polyoxyethylene ether, 25-40 parts of a sodium beta-naphthalenesulfonate wastewater mixed liquid, 10-20 parts of sulfite, 4-8 parts of a modifier, 0.75-2 parts of polyvinylpyrrolidone, 0.65-1.4 parts of dodecylpyridinium bromide, 3-4 parts of 30% hydrogen peroxide, 5-8 parts of a viscosity adjustment agent, 8-11 parts of an air entraining agent and 7-10 parts of an early-strength agent. By adopting the modification water reduction agent for concrete, the blending performance of the water reduction agent can be improved, the strength and the hardness of the concrete can be improved in application, and the viscosity of the water reduction agent can be adjusted in the use process through the viscosity adjusting agent, the air entraining agent and the early-strength agent, so that the concrete can be well laid, the curing time of the concrete can be shortened, and the modification water reduction agent for concrete has good effects inimproving the corrosion resistance of the concrete, increasing the water reduction rate and prolonging the service life of an engineering structure.

Description

Technical field [0001] The invention relates to the technical field of water-reducing agents, in particular to a modified water-reducing agent for concrete. Background technique [0002] Water reducer refers to an admixture that can reduce mixing water consumption and increase concrete strength under the conditions of constant workability and cement consumption, or save cement consumption under conditions of constant workability and strength. Superplasticizer is a kind of admixture with a wide range of applications in concrete admixtures. It is an admixture that has both retardation and greatly reduced mixing water consumption. [0003] In the process of using the water reducing agent, the reaction process is complicated, and the water reducing agent is relatively viscous and difficult to mix. At this time, some modified additives are usually injected into the water reducing agent to improve the performance of the water reducing agent. , And strengthen the mixing efficiency of wat...

Claims

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Application Information

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IPC IPC(8): C04B24/32C04B103/30
CPCC04B40/0039C04B2103/302C04B24/32C04B24/20C04B24/2652C04B24/005C04B22/14C04B22/068C04B22/10C04B24/16C04B24/122
Inventor 于浩
Owner 江苏博思通新材料有限公司
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