Test method for improving expansive soil based on microorganism-mineral interaction

Through the microbial-mineral interaction method, Bacillus coliciliform CSUFT21698 interacts with expansive soil to promote the weathering of montmorillonite, solve the problems of poor environmental pollution and controllability of traditional improvement technologies, and achieve low-cost and environmentally friendly expansive soil improvement effect.

CN120009505APending Publication Date: 2025-05-16CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY
2 Cites 1 Cited by

Patent Information

Application Number
CN202510042185.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-01
Publication Date
2025-05-16

AI Technical Summary

Technical Problem

Traditional expansive soil improvement technology has problems such as large engineering volume, long construction cycle, and environmental pollution. Microbial-induced calcium carbonate deposition technology has problems such as poor controllability of calcium ions and prone to weathering for a long time.

Method used

Using the method of microbial-mineral interaction, by selecting specific microbial strains such as Bacillus coliciliformis CSUFT21698, interact with expansive soil, promoting the weathering of montmorillonite minerals into non-expandable minerals, and reducing the content of montmorillonite in expansive soil.

Benefits of technology

It achieves the effect of improving the expansion soil with simple steps, low cost and environmentally friendly expansion and contractility caused by the expansion soil being rich in montmorillonite.

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

Abstract

The invention discloses an experimental method for improving expansive soil based on microorganism-mineral interaction, which utilizes the physiological characteristics of microorganisms to interact with montmorillonite and other minerals of the expansive soil, promotes the montmorillonite minerals to be weathered into non-expansive minerals, and reduces the content of montmorillonite in the expansive soil, thereby reducing the expansive property of the expansive soil and improving the expansive soil quality. The problems that the expansion and shrinkage of the expansive soil are not thoroughly improved through a microbial technology, calcium ion deposition is not easy to control, and long-term stability is poor are solved. Meanwhile, compared with a traditional expansive soil chemical improvement method, the method adopts a microbial technology, does not need to add a large number of chemical agents, and is low in cost, environmentally friendly, simple in test step and easy to popularize and apply.
Need to check novelty before this filing date? Find Prior Art