Mechanical behaviour of granular materials undergoing grain dissolution
Taeheon Kim1,2, Alessio Ferrari3, Lyesse Laloui3
1Laboratory of Soil Mechanics, Swiss Federal Institute of Technology, Lausanne, Switzerland. Taeheon.kim@ngi.no.
Scientific Reports
|September 19, 2024
Summary
Mineral dissolution in geomaterials poses risks to geotechnical projects, worsened by climate change. This study quanties dissolution effects on geomechanical behavior using salt-sand mixtures and oedometer tests.
Area of Science:
- Geotechnical Engineering
- Material Science
- Environmental Science
Background:
- Geotechnical projects face risks from mineral dissolution and particle loss.
- Climate change exacerbates these risks by accelerating physical processes.
- Understanding mineral dissolution's impact on geomechanical behavior is crucial.
Purpose of the Study:
- To propose a theoretical framework for the mechanical consequences of geomaterial dissolution.
- To experimentally investigate the effect of mineral dissolution on granular materials.
- To analyze the stress-dependent response of geomaterials to dissolution.
Main Methods:
- A theoretical approach was developed for geomaterial mechanical consequences.
- Oedometer tests were performed on salt-sand mixtures with varying salt content.
- Salt crystal dissolution was conducted under three different stress states.
Main Results:
- The effect of dissolution on mechanical behavior was dependent on dissolved salt quantity.
- The applied stress state significantly influenced the dissolution's impact.
- Laboratory experiments provided insights into grain dissolution's effect on granular materials.
Conclusions:
- The study validated a theoretical framework for analyzing geomaterial dissolution.
- Dissolution effects are linked to salt content and applied stress.
- Findings have implications for geotechnical engineering, especially concerning climate change.
Keywords:
Critical state soil mechanicsDegradation of geomaterialsDissolutionGeomechanicsGranular soilsMore Related Videos
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