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    Performance of thermally enhanced geo-energy piles and walls

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    Publication date
    2022-01
    End of Embargo
    2023-10-30
    Author
    Elkezza, O.
    Mohamed, Mostafa H.A.
    Khan, Amir
    Keyword
    Thermally enhanced concrete
    Energy pile efficiency
    Energy diaphragm wall
    Thermal conductivity of concrete
    Rights
    © 2021 Elsevier Ltd. All rights reserved. Reproduced in accordance with the publisher's self-archiving policy. This manuscript version is made available under the CC-BY-NC-ND 4.0 license.
    Peer-Reviewed
    Yes
    Open Access status
    embargoedAccess
    
    Metadata
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    Abstract
    This study aims to evaluate the impacts of using thermally enhanced concrete on the thermal performance of geoenergy structures and interaction between the thermo-active-structures and adjacent dry and partly saturated soils. Experiments using a fully instrumented testing rig were carried out on prototypes of energy pile and diaphragm wall made from normal concrete and thermally enhanced concrete by the addition of graphTHERM powder. Results illustrated that adding 36% of graphTHERM powder to the concrete by weight of cement was found to double the thermal conductivity of concrete and improve the stiffness by 15% without detrimental effects on the compressive strength. The heat transfer efficiency of energy pile and energy diaphragm wall made from thermally enhanced concrete was significantly improved by 50% and 66% respectively, in comparison with the efficiency of the same type of energy structure that was made from a typical normal concrete.
    URI
    http://hdl.handle.net/10454/18799
    Version
    Accepted manuscript
    Citation
    Elkezza O, Mohamed M and Khan A (2022) Performance of thermally enhanced geo-energy piles and walls. Geothermics. 98: 102274.
    Link to publisher’s version
    https://doi.org/10.1016/j.geothermics.2021.102274
    Type
    Article
    Notes
    The full-text of this article will be released for public view at the end of the publisher embargo on 30 Oct 2023.
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