Microbe synergistic magnesium oxide solidified roadbed material and reinforcing method
By optimizing the composition and construction method of microbial synergistic magnesium oxide solidification roadbed material, the problem of poor reinforcement effect in lunar environment was solved, achieving a balance of early strength, stability and environmental protection, and making it suitable for the reinforcement of complex Earth roadbeds.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- INSTITUTE FOR SMART CITY OF CHONGQING UNIVERSITY IN LIYANG LIYANG
- Filing Date
- 2026-04-23
- Publication Date
- 2026-07-17
AI Technical Summary
Existing microbial-induced magnesium carbonate precipitation reinforcement technology is not effective in the lunar environment and is difficult to adapt to the reinforcement needs of roadbeds on Earth.
The roadbed material is solidified by microbial synergy with magnesium oxide, including urease bacterial solution and cementing solution. The cementing solution consists of 3-8% active magnesium oxide, 0.5-2.0% urea, 0.1-0.5% nutrients and the balance solvent by mass percentage. By optimizing the component ratio and construction method, the decomposition of urea is promoted to generate magnesium carbonate precipitate, thereby achieving early strength effect.
It achieves controllable early strength, low pollution, and high stability of the roadbed. After reinforcement, the dry-wet cycle strength retention rate of the roadbed is ≥85%, and the CO2 emission is lower than that of traditional cement roadbeds. It is suitable for roadbed reinforcement under complex climatic and geological conditions.
Smart Images
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