Anti-segregation agent, method of preparation and use

The anti-segregation agent formed by specific reactive monomers solves the problems of insufficient dosage and poor aggregate adaptability in existing technologies, achieving effective encapsulation and anti-flocculation properties for concrete slurry, with wider adaptability and lower cost.

CN119774914BActive Publication Date: 2026-07-24GUANGDONG CHANGDA ENG TESTING CO LTD +2
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Patent Information

Application Number
CN202411889824.9
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-12-20
Publication Date
2026-07-24
Estimated Expiration
2044-12-20

AI Technical Summary

Technical Problem

Existing technologies for dealing with concrete segregation, especially concrete mixtures made from dry-process gneiss manufactured sand, have several drawbacks: small admixture amounts cannot effectively address encapsulation, while large admixture amounts negatively impact strength. Furthermore, existing anti-segregation agents have poor compatibility with aggregates.

Method used

An anti-segregation agent is used, comprising a dispersant, a thickener, and a preservative. The dispersant is formed by copolymerizing specific reactive monomers under the action of an initiator. Sulfonic acid monomers, organosilicon monomers, aromatic monomers, and phosphate ester monomers are introduced through a copolymerization reaction to form a low molecular weight, highly dispersible dispersant. It is then mixed with a plant-derived thickener, and a preservative is added to improve its anti-flocculation performance.

Benefits of technology

Without affecting the workability of concrete and reducing costs, it significantly improves the encapsulation of aggregates by concrete slurry, expands the range of aggregates it can adapt to, reduces segregation, improves suspension and anti-flocculation properties, has stronger adjustment capabilities, and is more flexible in its application.

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Abstract

The application discloses an anti-segregation agent, a preparation method and application, and relates to the technical field of concrete admixtures. The anti-segregation agent comprises a dispersing agent, a thickening agent and a preservative. The dispersing agent comprises a copolymer obtained by reacting monomers under the action of an initiator. The monomers comprise unsaturated carboxylic acid monomers and first monomers. The first monomers comprise at least one of sulfonic acid monomers, organic silicon monomers, aromatic monomers and phosphate ester monomers. The anti-segregation agent has a wider adaptation range for concrete aggregates, a larger upper and lower limit range for the segregation state of concrete, a stronger adjustment capacity for concrete mixtures, a more flexible adding and using mode, and a lower production cost.
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Citation Information

Patent Citations

  • Preparation method of anti-segregation agent for concrete, and product thereof

    CN112110670A

  • Low-sensitivity slow-release polycarboxylic acid slump retaining agent and preparation method thereof

    CN113896845A