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Concrete glue reducing agent and preparation method thereof

A glue reducer and concrete technology, which is applied in the field of concrete glue reducer and its preparation, can solve the problems of large differences in molecular structure types, small molecular weight of glue reducers, and limited dispersion ability of glue reducers, so as to avoid strength and collapse The effect of reducing the degree of reduction, reducing the amount of cement, and reducing the loss of time

Inactive Publication Date: 2020-07-17
南通瑞特建筑材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, the molecular weight of the main functional units of the gel reducer is generally small, basically does not have steric hindrance, and the gel reducer and dispersing ability is limited
The molecular structure types of glue reducer and water reducer are quite different, and there is a certain matching problem, which seriously restricts the application and development of glue reducer

Method used

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

Examples

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preparation example Construction

[0038]The preparation method of the polycarboxylic acid of the present invention is a preparation method well known in the art. In one embodiment, the preparation method of the polycarboxylic acid comprises the following steps: drop the monomer, the initiator and the chain transfer agent Add it into a solvent, react at 40-50 DEG C, adjust the pH to 6-7, and obtain the polycarboxylic acid.

[0039] Examples of initiators include, but are not limited to, persulfates, benzoyl peroxide, azobisisobutylcyanide, sodium dithionite, sodium formaldehyde sulfoxylate, ascorbic acid, sodium bisulfite, sodium metabisulfite, Sodium phosphite, dextrose monohydrate, maltodextrin. In a preferred embodiment, the initiator of the present invention accounts for 1-3 wt% of the weight of the monomer.

[0040] Examples of chain transfer agents include, but are not limited to, 3-mercaptopropionic acid, thioglycolic acid, mercaptoethanol, isopropanol. In one embodiment, the weight percentage of the c...

Embodiment 1

[0073] This example provides a glue reducer, the preparation raw material of the glue reducer includes 20 parts of substituted organic amine, 30 parts of polycarboxylic acid and 50 parts of water in parts by weight; the substituted organic amine is triethyl trisulfonate Esteramine and triethanolamine, the weight ratio is 1:2; The polycarboxylic acid is a modified polycarboxylic acid, and the preparation method of the modified polycarboxylic acid comprises the following steps: the monomer, the modifying agent, the initiator agent and chain transfer agent are added dropwise into the solvent, and after reacting at 45°C, the pH is adjusted to 6.5 to obtain the modified polycarboxylic acid; the monomers are acrylic acid, methacrylic acid, hydroxyethyl methacrylate, acrylic acid Dimethylaminoethyl ester, the weight ratio is 1:1.5:0.2:0.6, the initiator is sodium persulfate, accounting for 2wt% of monomer weight, the chain transfer agent is 3-mercapto propionic acid, accounting for mo...

Embodiment 2

[0078] This example provides a glue reducer, the preparation raw material of the glue reducer includes 30 parts of substituted organic amine, 45 parts of polycarboxylic acid and 60 parts of water in parts by weight; the substituted organic amine is disulfonic acid group- Ethanol-based diethyl ester amine and triisopropanolamine, the weight ratio is 1:3; the polycarboxylic acid is a modified polycarboxylic acid, and the preparation method of the modified polycarboxylic acid comprises the following steps: The monomer, modifying agent, initiator and chain transfer agent are added dropwise into the solvent, and after reacting at 45°C, the pH is adjusted to 6.5 to obtain the modified polycarboxylic acid; the monomers are acrylic acid, methacrylic acid, methacrylic acid hydroxyethyl acrylate, dimethylaminoethyl acrylate, the weight ratio is 1:1.5:0.2:0.6, the initiator is sodium persulfate, the weight percentage of the monomer is 2wt%, and the chain transfer agent is 3 -mercaptoprop...

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Abstract

The invention relates to the technical field of concrete preparation, and in particular, relates to a concrete glue reducing agent and a preparation method thereof. The glue reducing agent is composedof the preparation raw materials in parts by weight: 20-30 parts of substituted organic amine and 40-60 parts of water, wherein substituent groups of the substituted organic amine are selected from one or more of ester groups, sulfonic acid groups, carboxylic acid groups and hydroxyl groups. The invention provides the glue reducing agent. The glue reducing agent can be used in concrete, can obviously reduce the cement consumption, avoids the reduction of the concrete strength and slump, effectively reduces the time loss of the concrete, improves the harmony of the concrete, can act together with a water reducing agent and the like, saves the cost while ensuring the physical properties of the concrete, and conforms to JC / T2469-2018.

Description

technical field [0001] The invention relates to the technical field of concrete preparation, more specifically, the invention relates to a concrete glue reducer and a preparation method thereof. Background technique [0002] Under normal atmospheric environment, production mixing and curing conditions, there are still 5%-15% cement in the concrete that has not been fully hydrated, but only plays a role of filling, cannot be effectively dispersed and hydration reaction occurs, and cannot effectively exert its full potential. effectiveness of cement. On the other hand, due to the different adsorption and dispersion mechanisms of different series of water-reducing agents on cement particles, the water-reducing agent can affect the dispersion of cement particles in concrete and the bonding performance of the interface between cement paste and aggregate after being added to a certain extent. The improvement of concrete is difficult to work again, and the economy required by conc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B24/28
CPCC04B40/0039C04B24/122C04B24/121C04B24/283
Inventor 杨海华孙成伟
Owner 南通瑞特建筑材料有限公司
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