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Optimizing Hempcrete Properties Through Thermal Treatment of Hemp Hurds for Enhanced Sustainability in Green Building

Author

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  • Veronica D’Eusanio

    (Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy
    National Interuniversity Consortium of Materials Science and Technology (INSTM), 50121 Firenze, Italy)

  • Mirco Rivi

    (Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy
    National Interuniversity Consortium of Materials Science and Technology (INSTM), 50121 Firenze, Italy)

  • Daniele Malferrari

    (Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy
    Interdepartmental Research Center BIOGEST-SITEIA, University of Modena and Reggio Emilia, 42124 Reggio Emilia, Italy)

  • Andrea Marchetti

    (Department of Chemical and Geological Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy
    National Interuniversity Consortium of Materials Science and Technology (INSTM), 50121 Firenze, Italy
    Interdepartmental Research Center BIOGEST-SITEIA, University of Modena and Reggio Emilia, 42124 Reggio Emilia, Italy)

Abstract

This study examines the effects of the thermal pre-treatment of hemp hurds on the physical, mechanical, and thermal properties of hempcrete, evaluating its potential as a sustainable building material. Hemp hurds were pre-treated at various temperatures (120–280 °C) and characterized by proximate analysis, CHNS elemental analysis, and thermogravimetric analysis (TGA). The resulting hempcrete samples were analyzed for density, water absorption, compressive strength, and thermal conductivity. Three different hempcrete formulations, with varying lime:hemp proportions, were analyzed. The findings indicate that higher pre-treatment temperatures lead to reduced density and water absorption across all formulations. Formulations containing a higher hemp hurd content had lower densities but higher water absorption values. Compressive strength increased consistently with the pre-treatment temperature, suggesting that higher temperatures enhance matrix bonding and structural rigidity, and with the lime content. However, thermal conductivity also rose with pre-treatment, with only the composition containing the highest hemp hurd content maintaining the optimal insulation threshold (0.1 W/mK). This suggests a trade-off between compressive strength and insulation performance, influenced by the balance of hemp hurd and lime content. These findings underscore the potential of thermal pre-treatment to tailor hempcrete properties, promoting its application as a durable, moisture-resistant material for sustainable building, though the optimization of hurd–lime ratios remains essential.

Suggested Citation

  • Veronica D’Eusanio & Mirco Rivi & Daniele Malferrari & Andrea Marchetti, 2024. "Optimizing Hempcrete Properties Through Thermal Treatment of Hemp Hurds for Enhanced Sustainability in Green Building," Sustainability, MDPI, vol. 16(23), pages 1-18, November.
    • Handle: RePEc:gam:jsusta:v:16:y:2024:i:23:p:10404-:d:1531233
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    References listed on IDEAS

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    1. Veronica D’Eusanio & Antonio Lezza & Biagio Anderlini & Daniele Malferrari & Marcello Romagnoli & Fabrizio Roncaglia, 2024. "Technological Prospects of Biochar Derived from Viticulture Waste: Characterization and Application Perspectives," Energies, MDPI, vol. 17(14), pages 1-14, July.
    2. Ding, Yanming & Huang, Biqing & Li, Kaiyuan & Du, Wenzhou & Lu, Kaihua & Zhang, Yansong, 2020. "Thermal interaction analysis of isolated hemicellulose and cellulose by kinetic parameters during biomass pyrolysis," Energy, Elsevier, vol. 195(C).
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