Early-strength high-stability alkali-free accelerator and preparation method thereof

By using aluminum sulfate, aluminum tartrate, and sulfonic acid compounds as stabilizers in alkali-free quick-setting agents, combined with attapulgite and wollastonite powder, the stability problem of alkali-free quick-setting agents was solved, resulting in higher construction quality and compressive strength.

CN122102554AActive Publication Date: 2026-05-29SHIJIAZHUANG YIDAHENGLIAN ROAD BRIDGE MATERIAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHIJIAZHUANG YIDAHENGLIAN ROAD BRIDGE MATERIAL CO LTD
Filing Date
2026-04-09
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing alkali-free quick-setting agents have poor stability during storage and transportation, leading to problems such as stratification, crystallization, and precipitation, which affect construction quality and homogeneity.

Method used

Aluminum sulfate and aluminum tartrate are used as the main coagulating components, and sulfonic acid compounds are added as stabilizers. The hydrophilicity and high charge density of the sulfonic acid groups form a coordination complex structure, which inhibits the hydrolysis of aluminum ions. Combined with attapulgite and wollastonite powder, the pore structure is refined, thereby improving stability.

Benefits of technology

It significantly improves the stability of alkali-free quick-setting agents, reduces precipitation and aggregation, ensures construction quality and homogeneity, and enhances early and late compressive strength.

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Abstract

The application relates to the technical field of concrete admixtures, and discloses an early-strength high-stability alkali-free accelerator and a preparation method thereof. The early-strength high-stability alkali-free accelerator is prepared from the following components in percentage by weight: aluminum sulfate 40-60%, aluminum tartrate solution 10-20%, alcohol amine compound 4-15%, 1,2-propylene glycol 5-10%, pH regulator 1.0-5.0%, magnesium sulfate 6-10%, stabilizer 1.0-1.5%, and water 3-8.5%. The raw material of the stabilizer comprises a sulfonic acid compound, and the sulfonic acid compound comprises one or more of 4-hydroxybenzenesulfonic acid, aniline-2,4-disulfonic acid and 2-acrylamido-2-methylpropanesulfonic acid. The above technical scheme solves the problem of relatively poor stability of the alkali-free accelerator in the related art.
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Citation Information

Patent Citations

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  • Alkali-free accelerator as well as preparation method and application thereof

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