Abstract Rammed earth (RE) is a generic term for a number of construction materials that contain stabilised or non-stabilised earthen materials. RE materials are heterogeneous and their bulk performance depends on their mineralogical composition, physical texture, water content and mode of preparation. This category of building materials has recently been the subject of extensive studies, given the increasing interest in sustainable construction. This trend has highlighted not only the potential of RE, but also the lack of standards and guidelines that can promote its adoption by architects and builders. Predictive modelling techniques that faithfully forecast the mechanical behaviour of RE are also scarce. This study introduces a micromechanics approach and proposes a multi-scaling model to predict the mechanical behaviour of cement stabilised rammed earth (CSRE) in linear elasticity. The RE heterogeneity is addressed hierarchically at different scales separated by the sizes of their representative volume elements (RVE). Homogenisation procedures are applied to predict the material properties at each scale and investigate the overall macroscopic behaviour of earthen mixtures. The Mori-Tanaka homogenisation scheme is used to predict the linear elastic behaviour of CSRE by treating it as a porous composite. The theoretical results obtained by the application of various micro-mechanics-based models (Reuss-Voigt, Hashin-Strickman, Mori-Tanaka and Self-consistency) are assessed by comparison with the experimental data. The Mori-Tanaka homogenisation scheme proved to predict the material's macroscopic linear elastic behaviour fairly accurately while taking into account local heterogeneities.

中文翻译：

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水泥稳定夯土的微观力学建模

摘要 夯土 (RE) 是许多包含稳定或非稳定土料的建筑材料的总称。稀土材料是异质的，它们的整体性能取决于它们的矿物组成、物理质地、水含量和制备方式。鉴于对可持续建筑的兴趣日益浓厚，这类建筑材料最近成为广泛研究的主题。这一趋势不仅凸显了可再生能源的潜力，还突出了可促进建筑师和建筑商采用的标准和指南的缺乏。忠实地预测可再生能源机械行为的预测建模技术也很少见。本研究介绍了一种微观力学方法，并提出了一种多尺度模型来预测水泥稳定夯土 (CSRE) 的线性弹性力学行为。RE 异质性在不同尺度上分层解决，由其代表性体积元素 (RVE) 的大小分隔。均质化程序用于预测每个尺度的材料特性，并研究土混合物的整体宏观行为。Mori-Tanaka 均质化方案用于通过将 CSRE 视为多孔复合材料来预测 CSRE 的线弹性行为。应用各种基于微观力学的模型（Reuss-Voigt、Hashin-Strickman、Mori-Tanaka 和 Self-consistency）获得的理论结果通过与实验数据的比较进行评估。