Juncus maritimus fibers present an interesting cellular porous microstructure useful for thermal insulating properties. The elaboration and experimental characterization of composite materials based on different Juncus maritimus fibers content (0, 2, 5, 7 and 10 by mass) are investigated. We show that optimized composite materials can be elaborated from a simple chemically treatment of fibers. The thermo-physical properties (thermal conductivity, thermal diffusivity, and density) of both mortar composites with the raw and chemically treated fibers, were evaluated experimentally. Also, the water absorption uptake and mechanical strengths were performed to evaluate the chemical surface modification effects on the performances of the composites. As a result, due to their porous cellular microstructure, the use of Juncus maritimus fibers enhances the thermal insulating and lightness performances of reference mortar but affects negatively its mechanical strengths. The moisture effect tests reveal that thermal conductivity and density of the saturated composites are two times higher than that in a dry state. The chemical surface modification of used Juncus maritimus fibers improves the flexural and compressive strengths, decreases the water uptake of resulting composites with a low water diffusion coefficient. Thus, these new treated bio-cellular fibers composites can be used as structural and insulating lightweight concrete.

海马juncus纤维具有令人感兴趣的蜂窝状多孔微结构，可用于绝热性能。研究了基于不同海马（Juncus maritimus）纤维含量（质量为0、2、5、7和10）的复合材料的制备和实验表征。我们表明，可以通过对纤维进行简单的化学处理来优化复合材料。通过实验评估了两种含生纤维和化学处理纤维的砂浆复合材料的热物理性质（导热系数，热扩散系数和密度）。而且，进行了吸水率和机械强度以评价化学表面改性对复合材料性能的影响。结果，由于其多孔的细胞微结构，Juncus maritimus纤维的使用增强了参考砂浆的隔热和轻质性能，但对其机械强度产生了负面影响。水分效应测试表明，饱和复合材料的导热系数和密度是干燥状态下导热系数和密度的两倍。用过的Juncus maritimus纤维的化学表面改性可提高抗弯强度和抗压强度，降低所得复合材料的吸水率，且其水扩散系数低。因此，这些新的经过处理的生物细胞纤维复合材料可用作结构性和隔热性的轻质混凝土。湿气效应测试表明，饱和复合材料的导热系数和密度是干燥状态下导热系数和密度的两倍。用过的Juncus maritimus纤维的化学表面改性可提高抗弯强度和抗压强度，降低所得复合材料的吸水率，且其水扩散系数低。因此，这些新的经过处理的生物细胞纤维复合材料可用作结构性和隔热性的轻质混凝土。水分效应测试表明，饱和复合材料的导热系数和密度是干燥状态下导热系数和密度的两倍。用过的Juncus maritimus纤维的化学表面改性可提高抗弯强度和抗压强度，降低所得复合材料的吸水率，且其水扩散系数低。因此，这些新的经过处理的生物细胞纤维复合材料可用作结构性和隔热性的轻质混凝土。