The aim of this paper is to investigate the thermal behavior of composite building materials comprised of silt and flax fibers, considering various initial conditions. The experiments were conducted on flax fibers alone, examining factors such as moisture content variation, fibers arrangement, and density. Subsequently, the thermal properties of the earth-flax fiber composite were studied, taking into account the influence of water content and fibers mass content. The thermal properties of both flax fibers and raw earth-flax fibers composite specimens were determined using the experimental unsteady-state method. The results indicate that the thermal conductivity and heat capacity of flax fibers increase with density, temperature, and moisture content. Regardless of fibers density and arrangement of fibers, linear relationships have been established for both thermal conductivity and heat capacity as functions of temperature. Additionally, it was demonstrated that the heat capacity and the thermal conductivity increase with water content, regardless of the percentage of added fibers. Moreover, mixing randomly flax fibers with compacted raw earth material has improved the thermal properties of the composite. This improvement pertains to its insulating capacity, ability to store heat, and, subsequently, its contribution to the thermal comfort provided by such earth composite material when used as a building material.

中文翻译：

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生土亚麻纤维建筑材料的热性能

本文的目的是研究由淤泥和亚麻纤维组成的复合建筑材料的热行为，考虑各种初始条件。实验仅针对亚麻纤维进行，检查水分含量变化、纤维排列和密度等因素。随后，考虑了含水量和纤维质量含量的影响，研究了土-亚麻纤维复合材料的热性能。使用实验非稳态方法测定了亚麻纤维和生土亚麻纤维复合材料样品的热性能。结果表明，亚麻纤维的导热率和热容随着密度、温度和含水量的增加而增加。无论纤维密度和纤维排列如何，热导率和热容量均已建立为温度函数的线性关系。此外，结果表明，无论添加纤维的百分比如何，热容和导热率都会随着水含量的增加而增加。此外，将随机亚麻纤维与压实的原材料混合可以改善复合材料的热性能。这种改进涉及其隔热能力、储存热量的能力，以及随后当这种土复合材料用作建筑材料时对热舒适性的贡献。