Abstract
In the present work, we report the mechanical, thermal, and electrical behavior of a pure Moroccan bentonite clay as well as compacted sand (S), cement (C) and lime (L) based on bentonite (B) with a sand content maintained at 80% and a compaction intensity of 80 bars. The impedance spectroscopy data shows a semiconducting behavior for temperatures greater than 300 °C. The corresponding activation energies for the conduction and relaxation processes are calculated in the order of 706 meV and 728 meV, respectively. The dry density of the S-C-B-L mixtures shows a maximum in the range of 10% to 15% of water content. Thermal conductivity (λ), maximum compressive stress (Rcmax), apparent density and porosity as a function of the cement and lime content were analyzed. A maximum in Rcmax is observed for the sample F2 (S80C5B15L0 with 10% water content) with 5% of cement content, which corresponds to a maximum in λ and a minimum in porosity. This result is confirmed by the dynamic thermal characteristics describing the thermal behavior of our materials according to the standard (NF EN ISO 13786, 2008), since the composition F2 has a lower damping coefficient and a higher internal capacity.
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ME and RB conceptualization, methodology, software, formal analysis, validation, visualization, writing—original draft, writing—review and editing, investigation, project administration, data curation. YC supervision, resources. MM resources. AB resources. MO resources. SB visualization.
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Essaleh, M., Bouferra, R., Chihab, Y. et al. On the Structural, Thermal, Electrical and Mechanical Properties of Compacted Bentonite Material. Chemistry Africa 6, 3195–3206 (2023). https://doi.org/10.1007/s42250-023-00693-5
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DOI: https://doi.org/10.1007/s42250-023-00693-5