On the Structural, Thermal, Electrical and Mechanical Properties of Compacted Bentonite Material

Essaleh, Mohamed; Bouferra, Rachid; Chihab, Yassine; Mansori, Mohammed; Bouchehma, Abdeltif; Oubani, Mohamed; Belhouideg, Soufiane

doi:10.1007/s42250-023-00693-5

Cited by 2 publications

(1 citation statement)

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“…Our selection of aluminum is in line with the typical application of modified aluminum clays as a stabilizer in environmental contexts to improve the sedimentation of particles holding phosphorus [6]. It's worth mentioning that it has been reported recently on improving the thermal properties of nanocomposite by a solution intercalation method [7][8] the thermal conductivity of the nanocomposite increased with increasing aluminum content and reached a maximum value of 0.83 W/mK at 20 wt% aluminum loading, which was 3.3 times higher than that of pure clay-bentonite. The thermal stability of the nanocomposite also improved with increasing aluminum content, as indicated by higher decomposition temperature and lower weight loss.…”

Section: Introductionmentioning

confidence: 99%

Thermal Properties of Backfill Material for Underground Heat Exchange Applications

Suleiman,

Moraitis,

Abdel-Fattah

et al. 2024

J. Phys.: Conf. Ser.

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We are investigating the effect of the thermal properties of backfill material on the efficiency of underground thermal energy systems. We have used aluminum to increase the thermal properties of clay-bentonite and to investigate its potential as a backfill material in underground heat exchange applications. The measurements of thermal properties were made at room temperature using the Transient Plane Source (TPS) technique. The measurements were based on an infinite homogeneous medium using different composites of aluminum and clays in amounts of aluminum concentration ranging from 6 to 25 percent of the sample’s weight. The results confirmed an overall relative increase of 170% and 135% in the thermal conductivity and diffusivity, respectively as the Al content increased by 25%. The estimated average of the thermal transmittance (U-value ) of these samples was in the range from 0.40 to 1.1 W/m2K, which was directly proportional to the relative increase in the measured properties. Our findings can be applied to underground thermal energy systems, ground source heat pumps, and solid dielectric underground transmission lines.

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Section: Introductionmentioning

confidence: 99%