Laboratory Measurement of the Dynamic Properties of Fly Ash
Publication: Geo-Frontiers 2011: Advances in Geotechnical Engineering
Abstract
Fly ash is produced from the combustion of coal at power plants. Fly ash is fine-grained, well-rounded, cohesionless, and possesses a specific gravity of around 2.2. Fly ash is often placed hydraulically in fills in a loose, nearly saturated state. Therefore, it is highly susceptible to liquefaction, and it is very important to accurately estimate its dynamic properties when assessing the behavior of fly ash fills under dynamic loading. Herein, laboratory measurements of the dynamic properties of class F fly ash were performed on reconstituted specimens using the free-free resonant column method. These results indicate that the shear wave velocity of fly ash is typically around 110–150 m/s, and increases with increasing confining stress. Material damping of fly ash typically ranges from 2–5%. These results can be used to estimate the dynamic properties of fly ash for performing site response analyses on fly ash deposits.
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Copyright
© 2011 American Society of Civil Engineers.
History
Published online: Apr 26, 2012
ASCE Technical Topics:
- Ashes
- Continuum mechanics
- Dynamic loads
- Dynamic properties
- Dynamics (solid mechanics)
- Earth materials
- Energy infrastructure
- Engineering materials (by type)
- Engineering mechanics
- Fills
- Flow (fluid dynamics)
- Fluid dynamics
- Fluid mechanics
- Fluid velocity
- Fly ash
- Geomaterials
- Geotechnical engineering
- Hydrologic engineering
- Infrastructure
- Lifeline systems
- Materials engineering
- Power plants
- Recycling
- Seismic waves
- Shear waves
- Solid mechanics
- Structural behavior
- Structural dynamics
- Structural engineering
- Water and water resources
- Wave velocity
- Waves (mechanics)
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