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Preparation technology of concrete slump retention agent

A preparation process and slump technology, applied in the field of concrete admixtures, can solve problems such as the inability to meet actual use requirements

Inactive Publication Date: 2020-03-27
ZHEJIANG LAOHUSHAN BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above-mentioned technical problems, the present invention provides a preparation process of a concrete slump-retaining agent to solve the problem that the existing slump-retaining agent can no longer meet the needs of actual use

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The invention provides a kind of preparation technology of concrete slump retaining agent, comprises the following steps:

[0029] 1), its raw materials are composed of the following components in mass percentage: 45% of methyl alkenyl polyoxyethylene ether, 0.5% of methyl methacrylate, 0.2% of acrylamide, methacryloyloxyethyltrimethyl Ammonium chloride 0.2%, sodium hypophosphite 0.1%, maleic anhydride 1%, 2-acrylamido-2-methyl-1-propanesulfonic acid active monomer 5%, flake sodium hydroxide 1% , ascorbic acid 0.26%, mercaptopropionic acid 0.24%, hydroxybutyl methacrylate 2.9%, methylene succinic acid 2%, ammonium sulfate 0.5%, sodium bisulfite 0.1%, water 41%;

[0030] 2) Weigh the raw materials in proportion, add the methyl alkenyl polyoxyethylene ether and water into the reaction kettle for stirring and mixing and heat to 54°C-56°C to form a solution, and then add the first step 1) Methyl acrylate was added into the reaction kettle and stirred evenly to obtain the f...

Embodiment 2

[0053] The invention provides a kind of preparation technology of concrete slump retaining agent, comprises the following steps:

[0054] 1), its raw materials are composed of the following components in mass percentage: 30% of methyl alkenyl polyoxyethylene ether, 0.5% of methyl methacrylate, 0.2% of acrylamide, methacryloyloxyethyltrimethyl Ammonium chloride 0.2%, sodium hypophosphite 0.1%, maleic anhydride 2%, 2-acrylamido-2-methyl-1-propanesulfonic acid active monomer 6%, flake sodium hydroxide 1% , ascorbic acid 0.26%, mercaptopropionic acid 0.24%, hydroxybutyl methacrylate 2.9%, methylene succinic acid 2%, ammonium sulfate 0.5%, sodium bisulfite 0.1%, water 54%;

[0055] 2) Weigh the raw materials in proportion, add the methyl alkenyl polyoxyethylene ether and water into the reaction kettle for stirring and mixing and heat to 54°C-56°C to form a solution, and then add the first step 1) Methyl acrylate was added into the reaction kettle and stirred evenly to obtain the f...

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PUM

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Abstract

The invention provides a preparation technology of a concrete slump retention agent. The raw materials of the concrete slump retention agent comprise, by mass, 45% of methyl alkenyl polyoxyethylene ether, 0.5% of methyl methacrylate, 0.2% of acrylamide, 0.2% of methacryloyloxyethyl trimethyl ammonium chloride, 0.1% of sodium hypophosphite, 1% of maleic anhydride, 5% of a 2-acrylamido-2-methyl-1-propanesulfonic acid active monomer, 1% of flaky sodium hydroxide, 0.26% of ascorbic acid, 0.24% of mercaptopropionic acid, 2.9% of hydroxybutyl methacrylate, 2% of itaconic acid, 0.5% of ammonium sulfate, 0.1% of sodium hydrogen sulfite and 41% of water. The polymer design principle is utilized, and carboxylate radical ion protection and cation and anion coexistence are combined with a polymer crosslinking technology to prevent water reducer molecules from being adsorbed by fine particles such as cement, an admixture and mud powder too early, so that the slump of concrete is prevented from being lost within a certain period of time, and delayed coagulation is avoided, thereby the good slump retention is achieved.

Description

technical field [0001] The invention belongs to the field of concrete admixtures, and more specifically relates to a preparation process of a concrete slump retaining agent. 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 reducer is the third generation water reducer, which has high water reducing rate, less dosage, environmental protection and the ability to maintain concrete slump. With the rapid development of my country's economy and constru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08F283/06C08F220/58C04B24/16C04B103/30
CPCC08F283/065C04B24/165C04B2103/302
Inventor 毛华新毛卓荣
Owner ZHEJIANG LAOHUSHAN BUILDING MATERIALS