Effect of Fines on Thermal Conductivity of Dry Sand-Kaolin Mixture
Publication: Geo-Congress 2024
ABSTRACT
Soil thermal conductivity k plays a crucial role in analysis and design of different systems that rely on thermal interaction with the ground. Research indicates a significant difference between k values estimated using transient-state and steady-state methods. Apart from the rate of soil temperature increment, soil composition also influences the difference between transient-state thermal conductivity ktr and steady-state thermal conductivity kst. Such a deviation of kst from ktr of sand-kaolin mixture is overlooked in the literature. This research focuses on the influence of fines percentage on thermal conductivity of sand-kaolin mixtures. A specially designed consolidometer, which is capable of measuring both kst and ktr from soil temperature profile derived from a single test, was used in this research. Results demonstrate that the percentage of fines filling the pore space significantly influences heat conduction, and thereby effective thermal conductivity of the mixture.
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Information
Published In
Geo-Congress 2024
Pages: 509 - 518
History
Published online: Feb 22, 2024
ASCE Technical Topics:
- Continuum mechanics
- Dynamics (solid mechanics)
- Engineering materials (by type)
- Engineering mechanics
- Foundation construction
- Foundations
- Geomechanics
- Geotechnical engineering
- Material mechanics
- Material properties
- Materials characterization
- Materials engineering
- Mechanical properties
- Mixtures
- Sand (material)
- Soil analysis
- Soil mechanics
- Soil mixing
- Soil properties
- Solid mechanics
- Steady states
- Tension
- Thermal analysis
- Thermal properties
- Thermodynamics
- Transient response
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