Modified clay as thermal backfill material for buried electrical cables

Bashir M. Suleiman,Kais Daoudi,Atta G. Attaelmanan,Marwan Alzaylaie,Mattias Gustavsson

Thermal Science and Engineering Progress（2020）

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Abstract

•Thermal properties of Al-modified clay-bentonite have been investigated.•Thermal conductivity increased from 0.25 to 0.68 W/m-K, as the Al-content increased by 25%.•The average U-values have been found in the range from 0.40 to 1.1 W/m2 K.•The Al-modified clay bentonite material was found to be a promising candidate for backfill materials applications.

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Key words

Thermal conductivity,Underground buried transmission lines,Transient Plane Source,Clay backfill,IEC 287,U-value

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