Anti-segregation agent for concrete and preparation method thereof

An anti-segregation agent and concrete technology, which is applied in the field of concrete admixture, can solve the problems of concrete loss of fluidity, strong flocculation of anti-segregation agent, and fast concrete settling speed, so as to improve work performance and layering degree, and reduce cost , Improve the effect of mild pressure resistance

Inactive Publication Date: 2019-05-07
梁平县吉龙混凝土有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide an anti-segregation agent for concrete and a preparation method thereof, to solve the problem that the existing anti-segregation agent for concrete proposed in the above-mentioned background technology has a strong flocculation effect, which will cause the concrete to settle quickly and the concrete will lose its flow instantly. performance, problems with workability of concrete

Method used

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  • Anti-segregation agent for concrete and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The preparation method of this concrete anti-segregation agent comprises the steps:

[0024] S1: Mixing: Add 5.5 parts of silicone monomer, 288 parts of deionized water, 29 parts of polycarboxylate superplasticizer and 1.1 parts of polyethylene glycol into the reactor for mixing;

[0025] S2: Oxidation: Mix the mixture in step S1 evenly by stirring, add 3.3 parts of oxidizing agent to oxidize;

[0026] S3: Reduction: Add 13.9 parts of fly ash, 5.9 parts of mineral powder and 1.1 parts of steel fiber to the oxidation mixture in step S2, and then add 1.1 parts of reducing agent;

[0027] S4: Neutralization: Add 1.16 parts of viscosifier and 0.58 parts of coagulant to the reduced mixture in step S3, stir continuously until the mixture is uniform, then add liquid caustic soda to adjust the pH, so that the pH is between 7-9 Time, you can get the anti-segregation agent for concrete.

Embodiment 2

[0029] The preparation method of this concrete anti-segregation agent comprises the steps:

[0030] S1: Mixing: Add 14.8 parts of silicone monomer, 215 parts of deionized water, 21.5 parts of polycarboxylate superplasticizer and 2 parts of polyethylene glycol into the reactor for mixing;

[0031] S2: Oxidation: Mix the mixture in step S1 evenly by stirring, add 4.7 parts of oxidizing agent to oxidize;

[0032] S3: Reduction: Add 6.4 parts of fly ash, 14.6 parts of mineral powder and 1.8 parts of steel fiber to the oxidation mixture in step S2, and then add 2.9 parts of reducing agent;

[0033] S4: Neutralization: Add 0.85 parts of viscosifier and 0.85 parts of coagulant to the reduced mixture in step S3, stir continuously until the mixture is uniform, then add liquid caustic soda to adjust the pH, so that the pH is between 7-9 Time, you can get the anti-segregation agent for concrete.

Embodiment 3

[0035] The preparation method of this concrete anti-segregation agent comprises the steps:

[0036] S1: Mixing: Add 7.5 parts of silicone monomer, 250 parts of deionized water, 25 parts of polycarboxylate superplasticizer and 1.5 parts of polyethylene glycol into the reactor for mixing;

[0037] S2: Oxidation: Mix the mixture in step S1 evenly by stirring, add 4 parts of oxidizing agent to oxidize;

[0038] S3: Reduction: Add 10 parts of fly ash, 10 parts of mineral powder and 1.5 parts of steel fiber to the oxidation mixture in step S2, and then add 2 parts of reducing agent;

[0039] S4: Neutralization: add 1 part of viscosifier and 0.75 part of coagulant to the reduced mixture in step S3, stir continuously until the mixture is uniform, then add liquid caustic soda to adjust the pH, so that the pH is between 7-9 Time, you can get the anti-segregation agent for concrete.

[0040] Based on the above, the best embodiment of the preparation method of this anti-segregation agen...

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Abstract

The invention discloses an anti-segregation agent for concrete, which belongs to the technical field of concrete additives. The anti-segregation agent for the concrete is prepared from the following components: 5 to 15 parts of coal ash, 5 to 15 parts of mineral powder, 1 to 2 parts of steel fibers, 1 to 2 parts of polyethylene glycol, 20 to 30 parts of polyhydroxy acid water reducing agent, 0.8 to 1.2 parts of tackifier, 0.5 to 0.9 part of coagulation accelerator, 200 to 300 parts of deionized water, a plurality of parts of liquid caustic soda, 5 to 10 parts of organic silicon monomers, 3 to 5 parts of oxidant and 1 to 3 parts of reduction agent. By adding the coal ash, the mineral powder and the steel fibers, not only can the compression resistance of the concrete be improved, but also the working performance and layering degree of the concrete can be effectively improved, and the anti-segregation performance is improved; and the PAM is used as the tackifier, and the PAM has a lot of -NH2, so that the tackifier has good hydrophilia, the concrete has characteristics of hydrophilia, water retention, thickening, resistance reduction, tackifying and the like. The anti-segregation agent for the concrete is wide in source of raw materials, low in cost, environment-friendly and simple in operation.

Description

technical field [0001] The invention relates to the technical field of concrete admixtures, in particular to an anti-segregation agent for concrete and a preparation method thereof. Background technique [0002] As the largest building material, concrete has developed by leaps and bounds. In recent years, high-strength and high-performance concrete has been widely used in engineering. The fluidity of concrete has developed from the previous 70-90mm to the current slump of 180-230mm. Some projects also use self-compacting concrete, and the pumping height is getting higher and higher. However, the fluidity and cohesion of concrete are often contradictory, that is, it is difficult for concrete to maintain high cohesion in a large flow state. . In this way, the concrete that pursues high fluidity is prone to bleeding and segregation. Moreover, with the gradual depletion of river sand resources and mineral resources in my country, the gradation and fineness of river sand fluct...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B24/42
CPCC04B40/0039C04B2103/0082C04B18/08C04B18/12C04B14/48C04B24/32C04B2103/302C04B2103/44C04B2103/12C04B22/062C04B24/42C04B2103/0095C04B2103/0096
Inventor 何明胜李志强刘礼程建军
Owner 梁平县吉龙混凝土有限公司
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