摘   要：研究了钢纤维（SF）与玄武岩纤维（BF）混掺对超高性能混凝土（UHPC）工作性、力学性能和耐久性能的影响。结果表明：掺入纤维会降低UHPC的流动性，与空白组相比，2.0%SF组UHPC的流动度降低了29.03%，1.5%BF+0.5%SF组UHPC的流动度降低了43.55%；SF与BF按适宜比例混杂，可以优化UHPC内部的微观结构，从而提高UHPC的力学性能和耐久性能，其中，0.5%BF+1.5%SF组UHPC的综合性能最佳。 Abstract: The influence of mixing steel fiber(SF) and basalt fiber(BF) on the workability, mechanical properties, and durability of ultra-high performance concrete(UHPC) was studied. The results indicate that the addition of fibers can reduce the fluidity of UHPC. Compared with the blank group, the fluidity of the 2.0%SF group UHPC decreases by 29.03%, and the fluidity of the 1.5%BF+0.5%SF group UHPC decreases by 43.55%. Mixing SF and BF in appropriate proportions can optimize the microstructure inside UHPC, thereby improving its mechanical properties and durability. Among them, the 0.5%BF+1.5%SF group of UHPC has the best comprehensive performance.

於亚辉,孙有松,康爱红,等.混杂纤维UHPC的性能研究[J].混凝土与水泥制品,2025(6):47-52. YU Y H,SUN Y S,KANG A H,et al.Study on performance of hybrid fiber UHPC[J].China Concrete and Cement Products,2025(6):47-52.

摘   要：采用聚乙烯（PE）纤维和钢纤维（SF）制备了纤维增强水泥基复合材料（FCC），其中，固定PE纤维体积掺量为1%，研究了SF长度（6、10、13 mm）和体积掺量（0、0.3%、0.6%、0.9%）对FCC抗折性能的影响。结果表明：各组FCC试件的抗折破坏形式均为主裂缝破坏，其中，混杂纤维FCC试件的主裂缝宽度大于单掺PE纤维的FCC试件（JZ组），但主裂缝周围的细密裂缝数量较JZ组少；SF的掺入有效提升了FCC试件的抗折性能，相较于JZ组，混杂纤维FCC试件的开裂挠度最大提升了220.5%，峰值挠度最大提升了45.0%，开裂应力最大提升了251.3%，抗折强度最大提升了68.0%；随着SF掺量和长度的增加，混杂纤维FCC试件的弯曲韧性系数呈增大趋势，且当SF的长度为13 mm、掺量为0.9%时，FCC试件的弯曲韧性系数相对最大，较JZ组提升了27.66%。 Abstract: Fiber reinforced cementitious composites(FCC) were prepared with polyethylene(PE) fiber and steel fiber(SF), in which the volume content of PE fiber was fixed at 1%. Then the effects of the length(6, 10, 13 mm) and the volume content(0, 0.3%, 0.6%, 0.9%) of SF on the flexural performance of FCC were investigated. The results show that the flexural failure modes of FCC specimens are all in the form of main crack damage, and the main crack width of FCC specimens with hybrid fiber is larger than that of FCC specimens with PE fiber(JZ group), however, the number of fine cracks around the main crack is less than that of the JZ group. The incorporation of SF effectively improves the flexural performance of the FCC specimens. Compared with JZ group, the cracking deflection of FCC specimens with hybrid fiber is increased by a maximum of 220.5%, the peak deflection is increased by a maximum of 45.0%, the cracking stress is increased by a maximum of 251.3%, and the flexural strength is increased by a maximum of 68.0%. With the increase of the content and the length of SF, the bending toughness coefficient of FCC specimens with hybrid fiber shows an increasing trend, and the bending toughness coefficient of FCC specimens is relatively the largest when the length of SF is 13 mm and the content of SF is 0.9%, which is improved by 27.66% compared with that of JZ group.

姜超,朱学军,陈文文,等.SF-PE纤维混杂水泥基材料抗折性能研究[J].混凝土与水泥制品,2025(6):42-46,52. JIANG C,ZHU X J,CHEN W W,et al.Study on flexural performance of SF-PE hybrid fiber reinforced cementitious materials[J].China Concrete and Cement Products,2025(6):42-46,52.