A cured soft soil based on metakaolin-slag integrated geopolymer and a preparation method thereof

CN122102545APending Publication Date: 2026-05-29ZHEJIANG SCI-TECH UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHEJIANG SCI-TECH UNIV
Filing Date
2026-04-01
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

Existing soft soil solidification technologies using liquid alkali activators present problems such as environmental pollution, inconvenience in transportation and storage, and high energy consumption and carbon emissions, making it difficult to effectively improve the compressive strength and stability of soft soil.

Method used

Using metakaolin and slag as precursors, combined with calcium oxide and sodium bicarbonate as solid alkali activators, sodium hydroxide is generated through reaction to activate the polymerization of precursors, and calcium carbonate fills the soil pores to form a highly efficient geopolymer to solidify soft soil.

Benefits of technology

It significantly improves the early and long-term compressive strength of solidified soft soil, reduces carbon emissions, simplifies the operation process, reduces production costs, and improves the resource utilization rate of waste.

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Abstract

The application discloses a kind of based on metakaolin-slag integrated geopolymer's solidified soft soil and preparation method thereof, it is related to soil solidification technical field.The soft soil curing agent includes the precursor of metakaolin and slag, and the solid alkali activator of calcium oxide and sodium bicarbonate composition.Preparation method includes: the precursor is mixed with solid alkali activator according to proportion to obtain curing agent;Curing agent is incorporated into soft soil, and water is stirred to obtain slurry;Slurry is cured and formed.The application generates sodium hydroxide by in-situ reaction of calcium oxide and sodium bicarbonate to excite precursor polymerization, and generates calcium carbonate to fill pores.The application uses solid alkali activator to replace traditional liquid activator, avoids environmental pollution, simplifies construction operation, and the prepared solidified soft soil has excellent early compressive strength and continuously growing long-term strength, realizes the resource utilization of industrial waste.
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