<p>We present an experimental investigation of a bentonite material as a function of different parameters like compaction intensity, water content, and sintering temperature. Three thermal states are considered in this study: a) immediately after sample preparation (ASP), b) after curing for 28 days followed by a drying process at 105&#xa0;°C, and c) after sintering at 800&#xa0;°C for 6 h. Apparent density (ρ<sub>ap</sub>), electrical conductivity (σ), dielectric permittivity (ε), thermal conductivity (λ), thermal heat capacity (<i>C</i><sub>p</sub>), and maximum compressive strength (<i>R</i><sub>cmax</sub>) are analyzed. We show that ρ<sub>ap</sub>, λ, and <i>R</i><sub>cmax</sub> increase with the compaction intensity, and with the sintering temperature. From the wet state (ASP) to the dried state at 105&#xa0;°C /24h and then to the sintered state at 800&#xa0;°C, the apparent density, the electrical conductivity, and the thermal conductivity (for a water content less than 15%) show a decreasing behavior. The maximum compressive strength, on the other hand, shows an increasing one.</p>

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Room-temperature physical properties of Moroccan bentonite under different compaction intensities, water contents, and sintering temperatures

  • F. E. Bammou,
  • M. Essaleh,
  • A. Bouziane,
  • R. Bouferra,
  • Y. Bahammou,
  • A. Zoubir,
  • S. Belhouideg

摘要

We present an experimental investigation of a bentonite material as a function of different parameters like compaction intensity, water content, and sintering temperature. Three thermal states are considered in this study: a) immediately after sample preparation (ASP), b) after curing for 28 days followed by a drying process at 105 °C, and c) after sintering at 800 °C for 6 h. Apparent density (ρap), electrical conductivity (σ), dielectric permittivity (ε), thermal conductivity (λ), thermal heat capacity (Cp), and maximum compressive strength (Rcmax) are analyzed. We show that ρap, λ, and Rcmax increase with the compaction intensity, and with the sintering temperature. From the wet state (ASP) to the dried state at 105 °C /24h and then to the sintered state at 800 °C, the apparent density, the electrical conductivity, and the thermal conductivity (for a water content less than 15%) show a decreasing behavior. The maximum compressive strength, on the other hand, shows an increasing one.