What the study found
Enzyme-induced carbonate precipitation (EICP) improved the freeze-thaw resistance and mechanical behavior of Yili loess. The treated soil showed fewer cracks, higher strength, and a shift in failure mode compared with untreated loess.
Why the authors say this matters
The authors state that the findings validate the feasibility of applying EICP in high-altitude cold regions. They also suggest the technique can help suppress freeze-thaw-induced cracking in Yili loess.
What the researchers tested
The researchers applied EICP to Yili loess and examined its performance under freeze-thaw cycles, including 15 cycles, and under combined freeze-thaw and confining pressure conditions. They measured mechanical properties and used scanning electron microscope (SEM) observations to examine the soil structure.
What worked and what didn't
After 15 freeze-thaw cycles, EICP-treated specimens had only minor surface cracks, while untreated specimens developed extensive crack networks. The treated loess showed a 1.5-fold increase in unconfined compressive strength and a 1.33-fold rise in initial elastic modulus, with advantages still reported after cycling; shear strength remained higher mainly because cohesion increased, while the friction angle changed little.
What to keep in mind
The abstract does not provide detailed limitations beyond the tested conditions. The reported results are specific to Yili loess and the freeze-thaw and confining-pressure conditions described in the study.
Key points
- EICP reduced freeze-thaw cracking in Yili loess.
- Treated specimens kept only minor surface cracks after 15 freeze-thaw cycles, unlike untreated specimens.
- Unconfined compressive strength and initial elastic modulus were higher in EICP-treated loess.
- Shear strength stayed higher under freeze-thaw and confining pressure, mainly because cohesion increased.
- SEM observations showed calcium carbonate cementation filled pores and produced a denser structure.
Disclosure
- Research title:
- EICP improved freeze-thaw resistance of Yili loess
- Authors:
- Guangming Shi, Yuan Xue, Dejun Yang, Ai Zhang, Weiming Guan, Junhui Zhang, Xinhui Pan, Dingyu Wang, Chao Jin
- Institutions:
- China University of Mining and Technology, Xinjiang University
- Publication date:
- 2026-01-28
- OpenAlex record:
- View
Get the weekly research newsletter
Stay current with peer-reviewed research without reading academic papers — one filtered digest, every Friday.