Super-early-strength polycarboxylate superplasticizer as well as preparation method and application thereof

By combining specific carboxylic acid monomers and chain transfer agents, a molecular structure adapted to high sulfur-resistant cement was constructed. Combined with a redox initiation system and grafting modification, the problems of slow early strength development and weak sulfate attack resistance in the high sulfur-resistant cement and ultra-high performance concrete composite system were solved, achieving a synergistic improvement in early strength and anti-corrosion performance.

CN122079527APending Publication Date: 2026-05-26WUJIAQU GEHUI CHEM ENG
0 Cites 0 Cited by

Patent Information

Application Number
CN202610188644.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-10
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing polycarboxylate superplasticizers have problems such as slow early strength development and weak resistance to sulfate attack in the compound system of high sulfur-resistant cement and ultra-high performance concrete, which cannot meet the engineering construction needs in harsh environments.

Method used

By combining specific carboxylic acid monomers (acrylic acid and fumaric acid) with chain transfer agents (3-mercaptopropionic acid), a molecular structure suitable for high sulfur-resistant cement with low tricalcium aluminate content is constructed. Components with both adsorption and anti-erosion functions are introduced. The system reaction is precisely controlled by the redox initiation of ammonium persulfate and vitamin C. Combined with the scientific ratio of grafting modification and compounding stage, a synergistic protection mechanism is formed.

Benefits of technology

It achieves the dual goals of improving early strength and resisting erosion, breaking the limitations of traditional water-reducing agents that only optimize single performance. It is suitable for a variety of harsh environments, reduces production costs, and is easy to industrialize.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

The invention discloses a super-early-strength polycarboxylate superplasticizer as well as a preparation method and application thereof, and belongs to the technical field of admixtures for concrete. The preparation method of the water reducer comprises the following steps: dropwise adding a carboxylic acid monomer aqueous solution, an ammonium persulfate aqueous solution and a vitamin C aqueous solution into a methyl allyl polyoxyethylene ether aqueous solution to prepare a prepolymer; the preparation method comprises the following steps: carrying out graft modification on a phosphate monomer and acrylamide, adding a ternary compound of triethanolamine, calcium formate and sodium citrate and an organic silicon defoamer, and adjusting the solid content to obtain the super-early-strength polycarboxylate superplasticizer. A specific monomer combination and a composite modifier are adopted to adapt to a high-sulfur-resistance cement-ultra-high-performance concrete system, the problems that a traditional water reducing agent is poor in adaptability, insufficient in early strength and weak in erosion resistance are solved, synergistic improvement of water reduction, early strength and durability is achieved, the raw materials are environmentally friendly, the preparation process is mild, and the method is suitable for industrial production. And the method is suitable for low-temperature, high-sulfur saline-alkali and other harsh construction scenes.
Need to check novelty before this filing date? Find Prior Art