Due to respect for the environment and the search for more sustainable materials, scientists have started in recent decades to launch studies on bio-composite materials. It is well known that building materials are among the most commonly used materials and have an obvious negative impact on the environment. The development of environmentally friendly composites as insulating materials in buildings offers practical solutions to reduce energy consumption. Therefore, this work presents the use of a new bio-composite material composed of natural fibers, date palm fibers, cement, and sand. In addition, the study on the effect of adding date palm fibers on the thermo-mechanical characteristics of mortars assesses the thermal insulation properties as well as the water absorption and mechanical performance of this new bio-composite material to use it in the construction of buildings. The percentage by weight of date palm fiber in the test samples varied from 0% to 30% for a fiber size of length equal to 7 mm. The characteristics of these samples were determined experimentally in terms of resistance to bending and compression as well as thermal conductivity. The results show that while increasing the weight of date palm fiber, an obviously reduction in thermal conductivity, flexural, and compressive strength of the composite is observed. Hence, date palm fiber has a positive effect on the thermo-mechanical properties of the composite material. Therefore, it considerably improves the insulating capacity of the mortar.

中文翻译：

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椰枣纤维增强生物复合砂浆的热力学表征

由于尊重环境和寻找更可持续的材料，近几十年来，科学家们开始对生物复合材料进行研究。众所周知，建筑材料是最常用的材料之一，对环境有明显的负面影响。作为建筑隔热材料的环保复合材料的开发为降低能源消耗提供了实用的解决方案。因此，这项工作提出了使用由天然纤维、椰枣纤维、水泥和沙子组成的新型生物复合材料。此外，添加椰枣纤维对砂浆热机械特性影响的研究评估了这种新型生物复合材料的隔热性能以及吸水率和机械性能，以将其用于建筑施工。对于长度等于 7 毫米的纤维尺寸，测试样品中椰枣纤维的重量百分比从 0% 到 30% 不等。这些样品的特性是根据抗弯曲和压缩以及热导率的实验确定的。结果表明，在增加椰枣纤维重量的同时，观察到复合材料的导热系数、弯曲强度和抗压强度明显降低。因此，椰枣纤维对复合材料的热机械性能具有积极影响。