TY - JOUR
T1 - Experimental Investigation of Coupled Thermo-Hydraulic Properties of Glacial Tills
AU - Baser, Tugce
AU - Kim, Kiseok
AU - Tarpey, Elisabeth
AU - Makhnenko, Roman
AU - Stumpf, Andrew
N1 - Funding Information:
Campus as a Living Lab program of the Institute for Sustainability, Energy, and Environment (iSEE) and iSEE and Facilities and Services Carbon Credit Sales Fund at University at Illinois at Urbana-Champaign are greatly appreciated. The opinions are those of the authors alone and do not reflect those of the sponsors
Publisher Copyright:
© 2020 American Society of Civil Engineers.
PY - 2020
Y1 - 2020
N2 - This paper focuses on experimental investigation of the effect of temperature on coupled thermo-hydraulic properties of glacial tills. During operation of a geothermal system, geomaterials are subjected to thermal gradients that may significantly affect the hydraulic properties. An accurate characterization of these properties under representative field conditions is essential to provide input parameters for an efficient design. Therefore, this study focuses on the effect of temperature on hydraulic properties of glacial tills. Core samples at different depths were collected from a borehole for a planned geothermal site on the University of Illinois at Urbana-Champaign campus. A core flooding apparatus was used to perform experiments on saturated samples to characterize hydraulic properties of glacial tills at different temperatures and representative in situ stresses. The results revealed that the intrinsic permeability and hydraulic conductivity significantly increased with increasing temperatures. The increase was more pronounced at lower lateral stresses. An accurate characterization of coupled thermo-hydraulic properties of glacial tills will allow to the development of constitutive relationships for saturated geomaterials.
AB - This paper focuses on experimental investigation of the effect of temperature on coupled thermo-hydraulic properties of glacial tills. During operation of a geothermal system, geomaterials are subjected to thermal gradients that may significantly affect the hydraulic properties. An accurate characterization of these properties under representative field conditions is essential to provide input parameters for an efficient design. Therefore, this study focuses on the effect of temperature on hydraulic properties of glacial tills. Core samples at different depths were collected from a borehole for a planned geothermal site on the University of Illinois at Urbana-Champaign campus. A core flooding apparatus was used to perform experiments on saturated samples to characterize hydraulic properties of glacial tills at different temperatures and representative in situ stresses. The results revealed that the intrinsic permeability and hydraulic conductivity significantly increased with increasing temperatures. The increase was more pronounced at lower lateral stresses. An accurate characterization of coupled thermo-hydraulic properties of glacial tills will allow to the development of constitutive relationships for saturated geomaterials.
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U2 - 10.1061/9780784482827.001
DO - 10.1061/9780784482827.001
M3 - Conference article
AN - SCOPUS:85081969561
SN - 0895-0563
VL - 2020-February
SP - 1
EP - 10
JO - Geotechnical Special Publication
JF - Geotechnical Special Publication
IS - GSP 319
T2 - Geo-Congress 2020: Geo-Systems, Sustainability, Geoenvironmental Engineering, and Unsaturated Soil Mechanics
Y2 - 25 February 2020 through 28 February 2020
ER -