This research study presents the mechanical behaviour of new hybrid fiber reinforced engineered cementitious composite. Uniaxial compressive, four-point bending, direct tensile test, non-destructive testing and scanning electron microscopy of materials were performed to characterize the behaviour of new hybrid reinforced ECC. The replacement of polyvinyl alcohol (PVA) fiber with polyester (PET) fiber showed that the increment of PET fiber percentage in cement matrix enhanced the tensile strain and mid-point deflection; whereas, decreased the strength properties. Amalgam of three type of fibers at percentage level 1, 0.5 and 0.5 respectively in cementitious material increased the strength parameters; while, tensile strain and deflection decreased. Recorded ultrasonic pulse velocity values exhibited that the combined dispersion of polymeric and non-polymeric fibers do not affect the quality of concrete. Mechanical behaviour of different ECC matrices demonstrated that the dispersion of low modulus fiber enhanced the mid span deflection and tensile strain capacity; however, the inclusion of high modulus fiber improved the ability of matrix to sustain higher loadings. Hybridization of fibers cut the total cost of the cementitious matrix which promotes the use of ECC at large scale.

本研究展示了新型混合纤维增强工程水泥基复合材料的机械性能。对材料进行了单轴压缩、四点弯曲、直接拉伸试验、无损检测和扫描电子显微镜检查，以表征新型混合增强 ECC 的行为。用聚酯（PET）纤维代替聚乙烯醇（PVA）纤维表明，水泥基体中PET纤维含量的增加增加了拉伸应变和中点挠度；相反，降低了强度性能。胶凝材料中分别以 1、0.5 和 0.5 的百分比混合三种类型的纤维可提高强度参数；同时，拉伸应变和挠度减小。记录的超声脉冲速度值表明，聚合物纤维和非聚合物纤维的组合分散不会影响混凝土的质量。不同ECC基体的力学行为表明，低模量纤维的分散增强了中跨挠度和拉伸应变能力；然而，高模量纤维的加入提高了基质承受更高载荷的能力。纤维的杂交降低了水泥基体的总成本，促进了 ECC 的大规模使用。高模量纤维的加入提高了基质承受更高载荷的能力。纤维的杂交降低了水泥基体的总成本，促进了 ECC 的大规模使用。高模量纤维的加入改善了基体承受更高载荷的能力。纤维的杂交降低了水泥基体的总成本，促进了 ECC 的大规模使用。