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Slump retention agent and preparation method thereof

A technology of retaining agent and slump, which is applied in the field of slump retaining agent and its preparation, can solve the problems of uneven slump retaining performance of concrete, limited source of slump retaining agent raw materials, and affecting concrete construction performance, etc., to achieve the expansion of raw materials Source, excellent effect of slump retention performance

Active Publication Date: 2016-02-03
BEIJING ZHONGYANYI ENG TECH DEV CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Along with the wide application of slump retaining agent, its usage is increasing day by day, the synthetic raw material of existing slump retaining agent generally comprises polyether, initiator, chain transfer agent, reducing agent, small monomer and water, wherein, Polyether often chooses one or two or more of polyethylene glycol monomethyl ether, allyl polyoxyethylene ether, methallyl polyoxyethylene ether and methylbutenyl polyoxyethylene ether; Some slump retaining agents have limited sources of raw materials, and due to the differences in concrete composition, preparation technology and construction environment, the slump retaining agents have different performances on concrete and thus affect the construction performance of concrete; the existing slump The slump retaining agent can no longer meet the actual use requirements, so it is necessary to develop more slump retaining agent raw materials while ensuring the excellent performance of the slump retaining agent

Method used

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  • Slump retention agent and preparation method thereof
  • Slump retention agent and preparation method thereof
  • Slump retention agent and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The raw material components are as follows in parts by mass: 123 parts of methallyl glycol polyoxyethylene ether, 1109 parts of methallyl polyoxyethylene ether, 4.4 parts of ammonium persulfate, 4.4 parts of thioglycolic acid, 0.44 parts Ascorbic acid, 40 parts of acrylic acid, 170 parts of hydroxyethyl acrylate, 10 parts of hydroxybutyl acrylate, 2938.76 parts of water;

[0025] Put the above-mentioned 123 parts of methallyl glycol polyoxyethylene ether, the above-mentioned 1109 parts of methallyl polyoxyethylene ether and 968 parts of water into the reaction device, start stirring the ingredients, and obtain the mass percentage after fully dissolving A polyether solution with a concentration of 56%, the temperature of the polyether solution is 20°C, mix the above-mentioned 4.4 parts of thioglycolic acid, the above-mentioned 0.44 parts of ascorbic acid and 91.96 parts of water, and stir evenly to obtain a mixture solution with a concentration of 5% by mass , mixing the...

Embodiment 2

[0029] The raw material components are as follows in parts by mass: 308 parts of methallyl glycol polyoxyethylene ether, 1232 parts of methylbutenyl polyoxyethylene ether, 13.2 parts of sodium persulfate, 8.8 parts of mercaptopropionic acid, 2.2 parts Parts of sodium sulfite, 300 parts of acrylic acid, 96 parts of hydroxyethyl methacrylate, 2439.8 parts of water;

[0030] Put the above-mentioned 308 parts of methallyl glycol polyoxyethylene ether, the above-mentioned 1232 parts of methyl butenyl polyoxyethylene ether and 660 parts of water into the reaction device, start stirring the ingredients, and obtain the mass percentage after fully dissolving A polyether solution with a concentration of 70%, the temperature of the polyether solution is 22°C, mix the above-mentioned 8.8 parts of mercaptopropionic acid, the above-mentioned 2.2 parts of sodium sulfite and 99 parts of water, and stir evenly to obtain a mixture with a concentration of 10% by mass solution, mixing the above 3...

Embodiment 3

[0034] The raw material components are as follows in parts by mass: 693 parts of methallyl glycol polyoxyethylene ether, 350 parts of methallyl polyoxyethylene ether, 342 parts of methylbutenyl polyoxyethylene ether, 8.8 Parts of hydrogen peroxide, 9.68 parts of mercaptopropionic acid, 2.2 parts of ascorbic acid, 80 parts of acrylic acid, 180 parts of hydroxyethyl acrylate, 101 parts of hydroxypropyl acrylate, 14 parts of hydroxybutyl acrylate, 2620.32 parts of water;

[0035] Put the above 693 parts of methallyl glycol polyoxyethylene ether, 350 parts of methallyl polyoxyethylene ether, 342 parts of methylbutenyl polyoxyethylene ether and 924 parts of water into the reaction device, open Stir the chemical material, and obtain a polyether solution with a mass percentage concentration of 60% after fully dissolving. The temperature of the polyether solution is 25°C. Mix the above-mentioned 9.68 parts of mercaptopropionic acid, the above-mentioned 2.2 parts of ascorbic acid and 18...

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Abstract

The invention discloses a slump retention agent and a preparation method thereof, relating to the field of concrete admixtures and solving the problem that the sources of raw materials of slump retention agents are limited. The slump retention agent comprises the following raw materials by mass percent: 28-35% of polyether, 0.1-0.3% of initiator, 0.1-0.2% of chain transfer agent, 0.01-0.05% of reducing agent, 5-9% of small monomers and 55.45-66.79% of water, wherein polyether is methyl allyl ethylene glycol polyoxyethylene ether or a mixture of methyl allyl ethylene glycol polyoxyethylene ether and methyl allyl polyoxyethylene ether and / or methyl butenyl polyoxyethylene ether. The slump retention agent has a wide range of selectable raw materials and excellent properties.

Description

technical field [0001] The invention relates to the field of concrete admixtures, in particular to a slump retaining agent and a preparation method thereof. Background technique [0002] As a building material, concrete is widely used in many fields. With the development of concrete, the technology of concrete admixture has also been rapidly developed. Concrete admixture is an indispensable component in concrete. It plays a role in concrete production technology. To the core role, determines the quality of concrete. Among them, as an important concrete admixture, water reducing agent can effectively improve the construction performance of concrete and increase the strength of concrete. Among many water reducers, polycarboxylate water reducers are the third generation of water reducers, which have high water reducing rate, low dosage, environmental protection and the ability to maintain concrete slump; with the rapid development of my country's economy and construction With ...

Claims

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Application Information

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IPC IPC(8): C04B24/32
Inventor 白杰蔡阳王博
Owner BEIJING ZHONGYANYI ENG TECH DEV CENT
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