The paper aims to provide a comprehensive study on the compositional optimization of high-conductive multifunctional fiber-reinforced cement mortars (FRCMs). Therefore, the effects of three different fiber types: virgin carbon fibers (VCFs), recycled carbon fibers (RCFs), and brass-plated steel fibers (BSFs), added at a broad range of concentrations, as 0.05%, 0.1%, 0.2%, 0.4%, 0.8%, 1.2%, and 1.6% by volume, on the mechanical, electrical and durability properties of FRCMs have been compared. The results showed that RCFs increase the flexural and tensile splitting strength up to 100%, whereas BSFs improve the compressive strength by 38%. Moreover, the fibers decrease both the capillary water absorption and the drying shrinkage by 39%. Electrical conductivity tests show that RCFs decrease the electrical resistivity of mortars up to one order of magnitude, in addition to a percolation threshold between 0.1 and 0.2 vol.%.

本文旨在为高导电性多功能纤维增强水泥砂浆（FRCM）的成分优化提供全面的研究。因此，三种不同纤维类型的影响：原始碳纤维（VCF），再生碳纤维（RCF）和镀黄铜钢纤维（BSF）的添加浓度范围很广，分别为0.05％，0.1％，0.2比较了FRCM的机械，电气和耐久性能分别占体积百分比，0.4％，0.8％，1.2％和1.6％。结果表明，RCF将弯曲和拉伸断裂强度提高了100％，而BSF将抗压强度提高了38％。此外，纤维将毛细吸水率和干燥收缩率降低了39％。