Method for restoring the performance of aged bitumen based on microbial degradation
By screening and using a composite microbial community in stages to degrade aged asphalt, the problems of unstable recycling effect and complex process of aged asphalt have been solved. This has achieved efficient and controllable performance restoration, breaking the traditional understanding that microbial degradation is harmful to asphalt, and has good application prospects and environmental friendliness.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHONGQING JIAOTONG UNIV
- Filing Date
- 2026-04-30
- Publication Date
- 2026-07-17
AI Technical Summary
In existing technologies, the recycling effect of aged asphalt is unstable, the process is complex and costly, and the technical maturity of microbial degradation methods is insufficient. The degradation of asphalt by microorganisms in nature accelerates aging, leading to a decline in the performance of asphalt pavement.
Specific microbial strains were screened, and a phased degradation method was adopted. A composite microbial community was used to degrade the asphaltenes and resins in aged asphalt. Solid and liquid culture media were prepared, single colonies were formed and purified, and the colonies were divided into conventional degradation group and high-efficiency degradation group. The initial rapid start-up and the later deep degradation were carried out to restore the performance of aged asphalt.
It achieves stable recovery of the properties of aged asphalt, with high degradation efficiency and controllable process, overcoming the shortcomings of traditional methods, and has good engineering application prospects and environmental friendliness.
Smart Images
Figure CN122405313A_ABST