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<p>Constructing and operating buildings significantly impact our environment due to the high sectoral demand for natural resources and energy. Consequently, strategic and societal issues, both nationally and internationally, encourage the development of solutions that are both efficient and environmentally friendly for building construction. Bio-based materials, a field of research that has been invested in for several years, offer efficient and ground-breaking perspectives due to their thermal insulation performances and excellent moisture regulation capabilities. Despite the large number of studies dedicated to optimizing plant-based aggregate materials, there are still avenues for improvement and performance optimization. This literature review has allowed us to understand that phenomena observed at the macroscopic scale are often linked to interactions at the microscopic scale. There are correlations between the microstructural, hygrothermal and chemical properties of the aggregates. A deep understanding of these interactions is essential to precisely identify the influence of each parameter on the others. For instance, pore size affects the sorption isotherm, while pore shape plays a key role in thermal conductivity. Additionally, chemo-hydric interactions, such as the influence of chemical composition on the water behavior of aggregates and composites, are also crucial. This article addresses all these phenomena, highlighting the interactions between microstructure, hygrothermal properties and chemical characteristics of plant-based aggregates. A novel aspect of this study is the synthesis of various treatments (chemical, physical and thermal) that can be applied to aggregates to mitigate their weaknesses and enhance their performance. We also provide a critical analysis of the most relevant treatments based on the intended applications. Finally, we present characterization methods suitable for each property of plant-based aggregates to offer a comprehensive and rigorous approach to their optimization.</p>

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Effects of microstructure and chemical composition on the life cycle assessment and hygrothermal properties of concrete aggregates: a review

  • 期刊论文

  • 发表日期：

    2026年7月20日

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  • Mohammed Yacine Benariba,
  • Anh Dung Tran-Le,
  • Dang Mao Nguyen,
  • Imane Bekrine,
  • Geoffrey Promis

摘要

Constructing and operating buildings significantly impact our environment due to the high sectoral demand for natural resources and energy. Consequently, strategic and societal issues, both nationally and internationally, encourage the development of solutions that are both efficient and environmentally friendly for building construction. Bio-based materials, a field of research that has been invested in for several years, offer efficient and ground-breaking perspectives due to their thermal insulation performances and excellent moisture regulation capabilities. Despite the large number of studies dedicated to optimizing plant-based aggregate materials, there are still avenues for improvement and performance optimization. This literature review has allowed us to understand that phenomena observed at the macroscopic scale are often linked to interactions at the microscopic scale. There are correlations between the microstructural, hygrothermal and chemical properties of the aggregates. A deep understanding of these interactions is essential to precisely identify the influence of each parameter on the others. For instance, pore size affects the sorption isotherm, while pore shape plays a key role in thermal conductivity. Additionally, chemo-hydric interactions, such as the influence of chemical composition on the water behavior of aggregates and composites, are also crucial. This article addresses all these phenomena, highlighting the interactions between microstructure, hygrothermal properties and chemical characteristics of plant-based aggregates. A novel aspect of this study is the synthesis of various treatments (chemical, physical and thermal) that can be applied to aggregates to mitigate their weaknesses and enhance their performance. We also provide a critical analysis of the most relevant treatments based on the intended applications. Finally, we present characterization methods suitable for each property of plant-based aggregates to offer a comprehensive and rigorous approach to their optimization.