Concrete water reducing agent and preparation method thereof

A technology of concrete water reducing agent and photoinitiator, applied in the field of building admixtures, can solve problems such as poor slump retention of concrete

Pending Publication Date: 2021-04-27
重庆建研科之杰建材有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] In order to solve the problem of poor slump retention of existing concrete mentioned in the above-mentioned background technology, the present invention provides a concrete water reducer, the water reducer includes:

Method used

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  • Concrete water reducing agent and preparation method thereof
  • Concrete water reducing agent and preparation method thereof
  • Concrete water reducing agent and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0037] A concrete water reducer, made of the following raw material components by weight: 260 parts by weight of methoxypolyethylene glycol, 0.35 parts by weight of hydroquinone, 42 parts by weight of methacrylic acid, 350 parts by weight of water, 3.7 parts by weight Parts by weight of thioglycolic acid, 26 parts by weight of acrylic acid, 9.8 parts by weight of benzylethanol ketone and 5.5 parts by weight of sodium propylene sulfonate.

[0038] Concrete preparation method comprises the following steps:

[0039] (1) In a reaction vessel including a thermometer, a stirrer, a nitrogen inlet pipe and a reflux cooling pipe (condenser), add 260 parts by weight of methoxypolyethylene glycol, 42 parts by weight of methacrylic acid and 0.35 parts by weight of Hydroquinone, the temperature was raised to 105°C, and nitrogen replacement was carried out with nitrogen at a flow rate of 400ml / min for 4 hours, the temperature was lowered to 60°C, and nitrogen was stopped to obtain mixed sol...

Embodiment 2

[0043] A concrete water reducer, made of the following raw material components by weight: 270 parts by weight of methoxypolyethylene glycol, 0.39 parts by weight of hydroquinone, 45 parts by weight of methacrylic acid, 380 parts by weight of water, 3.1 parts by weight Parts by weight of mercaptoethanol, 28 parts by weight of itaconic acid, 10.3 parts by weight of benzophenone and 6.4 parts by weight of sodium propylene sulfonate.

[0044]Concrete preparation method comprises the following steps:

[0045] (1) In a reaction vessel including a thermometer, a stirrer, a nitrogen inlet pipe and a reflux cooling pipe (condenser), add 270 parts by weight of methoxypolyethylene glycol, 45 parts by weight of methacrylic acid and 0.39 parts by weight of Hydroquinone, the temperature was raised to 110°C, and nitrogen replacement was carried out with nitrogen at a flow rate of 400ml / min for 4 hours, the temperature was lowered to 60°C, and nitrogen was stopped to obtain mixed solution A; ...

Embodiment 3

[0049] A concrete water reducer, made of the following raw material components by weight: 265 parts by weight of methoxypolyethylene glycol, 0.36 parts by weight of hydroquinone, 49 parts by weight of methacrylic acid, 385 parts by weight of water, 6 parts by weight Parts by weight of mercaptopropionic acid, 25 parts by weight of crotonic acid, 10.5 parts by weight of benzophenone and 7 parts by weight of sodium propylene sulfonate.

[0050] Concrete preparation method comprises the following steps:

[0051] (1) In a reaction vessel including a thermometer, a stirrer, a nitrogen inlet pipe and a reflux cooling pipe (condenser), add 265 parts by weight of methoxypolyethylene glycol, 49 parts by weight of methacrylic acid and 0.36 parts by weight of Hydroquinone, the temperature was raised to 112°C, and nitrogen replacement was carried out with nitrogen at a flow rate of 400ml / min for 4 hours, the temperature was lowered to 60°C, and nitrogen was stopped to obtain mixed solution...

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Abstract

The invention relates to the technical field of building admixtures, in particular to a concrete water reducing agent and a preparation method thereof. The concrete water reducing agent comprises a photopolymerizable monomer selected from alkoxy polyethylene glycol esterification intermediates, and a photoinitiator which is benzoin. According to the concrete water reducing agent provided by the invention, the alkoxy polyethylene glycol esterification intermediate is adopted, slump retaining performance and water reducing performance can be both considered, meanwhile, the reaction can be carried out at normal temperature or low temperature, monomer prepolymerization is directly initiated through light irradiation, the polymerization rate is greatly increased, the synthesis conversion rate is increased, and the sensitivity is reduced; and in addition, the sulfonic acid group is added, so that the surfaces of cement particles can be stably adsorbed, the hydration reaction can be effectively delayed, the dispersing and slump retaining effects in concrete with medium and low strength grades are enhanced, and the market application prospect is extremely wide.

Description

technical field [0001] The invention relates to the technical field of building admixtures, in particular to a concrete water reducer and a preparation method thereof. Background technique [0002] As a new generation of high-performance superplasticizer, polycarboxylate superplasticizer has the advantages of low dosage, high water reducing rate, good slump retention, and environmental protection. Its engineering applications are becoming more and more extensive. Railways, highways, dams, The construction of bridges, tunnels and high-rise buildings is inseparable from polycarboxylate superplasticizers. Especially in recent years, the rapid development of my country's high-speed rail projects has further stimulated the development of the polycarboxylate superplasticizer industry, and the application of polycarboxylate superplasticizers has also been extended to the civil construction industry, including urban buildings and residential buildings. [0003] In order to improve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/06C08F228/02C08F222/02C08F220/04C08F2/48C04B24/16C04B103/30
CPCC08F283/065C08F2/48C04B24/165C04B2103/302C08F220/06C08F228/02C08F222/02C08F220/04
Inventor 李卫黄小文孟祥杰
Owner 重庆建研科之杰建材有限公司
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