Study on the mechanical properties of unloaded damaged sandstone under dry-wet and freeze-thaw cycling conditions
Author Information
Author(s): Wang Wenrui, Chen Xingzhou, Chen Lili, Gong Sheng, Su Zhenkun
Primary Institution: School of Architecture and Civil Engineering, Xi’an University of Science and Technology, Xi’an, China
Hypothesis
The study investigates how dry-wet and freeze-thaw cycles affect the mechanical properties of unloaded damaged sandstone.
Conclusion
The mechanical properties of unloaded damaged sandstone degrade significantly with increasing cycles of drying-wetting and freezing-thawing.
Supporting Evidence
- The mechanical properties of sandstone are significantly impacted by cycles of drying-wetting and freezing-thawing.
- As the number of environmental cycles increases, the stress-strain curve profile shows a descending trend.
- The elastic modulus, cohesion, and friction angle all show a trend of attenuation with increased cycling.
- Uniaxial failure of unloaded damaged samples is primarily brittle, while triaxial failure exhibits plastic characteristics.
Takeaway
When rocks get wet and dry or freeze and thaw a lot, they can get weaker and break more easily.
Methodology
The study involved testing sandstone samples under controlled dry-wet and freeze-thaw cycles, followed by mechanical testing to assess changes in properties.
Limitations
The study did not include precise measurements of porosity after freeze-thaw cycles, which may affect the interpretation of results.
Digital Object Identifier (DOI)
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