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Concrete admixture capable of improving workability and preparation method thereof

A concrete admixture and modification technology, which is applied in the field of concrete admixtures, can solve the problems of difficult control of the ratio, complex composition of the admixtures, etc., and achieves the effects of good water-reducing performance and slump-preserving performance.

Active Publication Date: 2021-05-18
佛山市凯隽新建材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Although the above-mentioned existing technologies can improve the performance of concrete, they all need to be used in conjunction with water reducers and slump-retaining agents to achieve corresponding effects. The composition of admixtures is complex and the proportion is difficult to control

Method used

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  • Concrete admixture capable of improving workability and preparation method thereof
  • Concrete admixture capable of improving workability and preparation method thereof
  • Concrete admixture capable of improving workability and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] A kind of concrete admixture that can improve workability of the present embodiment comprises the following components by weight:

[0031]

[0032] The preparation method of above-mentioned concrete admixture comprises following preparation steps:

[0033] (1) Add γ-methacryloxypropyltrimethoxysilane to heptadecylfluorodecyltrimethoxysilane with a molar ratio of 1:2.5 into the isopropanol solvent, stir and dissolve evenly, add dropwise at room temperature Deionized water is used for hydrolysis and polycondensation, and after the reaction is completed, the low boilers are evaporated under reduced pressure to obtain a silane-modified monomer.

[0034] (2) Dissolve allyl polyoxyethylene ether in water, stir and heat up to 55°C, then dropwise add a mixed solution of acrylic acid, silane-modified monomer and initiator ammonium persulfate, wherein allyl polyoxyethylene ether, The molar ratio of acrylic acid and silane modified monomer is 1:3:0.02, heat preservation reacti...

Embodiment 2

[0037] A kind of concrete admixture that can improve workability of the present embodiment comprises the following components by weight:

[0038]

[0039] The preparation method of above-mentioned concrete admixture comprises following preparation steps:

[0040] (1) Add γ-methacryloxypropyltrimethoxysilane to heptadecylfluorodecyltrimethoxysilane with a molar ratio of 1:2.5 into the isopropanol solvent, stir and dissolve evenly, add dropwise at room temperature Deionized water is used for hydrolysis and polycondensation, and after the reaction is completed, the low boilers are evaporated under reduced pressure to obtain a silane-modified monomer.

[0041] (2) Dissolve allyl polyoxyethylene ether in water, stir and heat up to 55°C, then dropwise add a mixed solution of acrylic acid, silane-modified monomer and initiator ammonium persulfate, wherein allyl polyoxyethylene ether, The molar ratio of acrylic acid and silane modified monomer is 1:3:0.05, heat preservation reacti...

Embodiment 3

[0044] A kind of concrete admixture that can improve workability of the present embodiment comprises the following components by weight:

[0045]

[0046] The preparation method of above-mentioned concrete admixture comprises following preparation steps:

[0047] (1) Add γ-methacryloxypropyltrimethoxysilane to heptadecylfluorodecyltrimethoxysilane with a molar ratio of 1:2.5 into the isopropanol solvent, stir and dissolve evenly, add dropwise at room temperature Deionized water is used for hydrolysis and polycondensation, and after the reaction is completed, the low boilers are evaporated under reduced pressure to obtain a silane-modified monomer.

[0048](2) Dissolve allyl polyoxyethylene ether in water, stir and heat up to 55°C, then dropwise add a mixed solution of acrylic acid, silane-modified monomer and initiator ammonium persulfate, wherein allyl polyoxyethylene ether, The molar ratio of acrylic acid and silane modified monomer is 1:3:0.1, heat preservation reaction...

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Abstract

The invention belongs to the technical field of concrete admixtures, and discloses a concrete admixture capable of improving workability and a preparation method thereof. The concrete admixture comprises the following components in parts by weight: 22%-45% of a modified polycarboxylate superplasticizer, 2%-8% of sodium gluconate, 0.1%-0.5% of sodium dodecyl benzene sulfonate, 0.05%-0.12% of polyvinyl alcohol and the balance of water. The modified polycarboxylic acid water reducing agent adopted by the concrete admixture can achieve good water reducing performance and slump retaining performance at the same time, the water reducing performance and the slump retaining performance can be adjusted by adjusting the structural proportion of the modified polycarboxylic acid water reducing agent, compounding of two substances is not needed, and the concrete admixture has remarkable application advantages.

Description

technical field [0001] The invention belongs to the technical field of concrete admixtures, and in particular relates to a concrete admixture capable of improving workability and a preparation method thereof. Background technique [0002] Concrete admixtures are chemical substances that are added in the process of mixing concrete, accounting for less than 5% of the cement mass, and can significantly improve the performance of concrete. Concrete admixtures are characterized by many varieties and small dosage, which have a great influence on the performance of concrete, and have the characteristics of less investment, quick results, and remarkable technical and economic benefits. With the continuous advancement of science and technology, admixtures have been used more and more. [0003] There are many types of concrete admixtures with different functions. Various admixtures can be used to achieve different effects, such as improving the workability of concrete, improving the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/26C04B24/32C08F283/06C08F220/06C08F230/08
CPCC04B40/0039C04B24/26C04B24/32C08F283/065C08F220/06C08F230/085C04B2103/302C04B24/10C04B24/20C04B24/2623Y02W30/91
Inventor 李桂青李培春卢才能吴文华星耀
Owner 佛山市凯隽新建材科技有限公司
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