Dziomdziora Paulina, Smarzewski Piotr
Doctoral School, Faculty of Civil Engineering and Geodesy, Military University of Technology, 2 Gen. Sylwestra Kaliskiego, 00-908 Warsaw, Poland.
Faculty of Civil Engineering and Geodesy, Military University of Technology, 2 Gen. Sylwestra Kaliskiego, 00-908 Warsaw, Poland.
Materials (Basel). 2025 May 22;18(11):2426. doi: 10.3390/ma18112426.
Ultra-high-performance concrete (UHPC) has emerged as a revolutionary material in structural engineering due to its exceptional mechanical properties and durability. This review comprehensively examines the influence of hybrid fiber compositions on UHPC, focusing on mechanical performance and resistance to environmental degradation. Hybrid fibers, which combine steel and synthetic and basalt fibers, improve compressive, tensile, and flexural strengths by bridging microcracks and limiting macrocrack propagation. Studies reveal that steel fiber combinations, particularly those with varying lengths and shapes, significantly improve ductility and load-bearing capacity, while steel-synthetic hybrids balance strength and flexibility. However, excessive synthetic fibers can reduce compressive strength. Basalt-synthetic hybrids, though less effective in compression, excel in tensile strength and crack resistance. Durability assessments highlight the superior resistance of UHPCs to chloride penetration, carbonation, freeze-thaw cycles, and high temperatures, and hybrid fibers further mitigate spalling and permeability. Polypropylene fibers, for instance, enhance fire resistance by creating vapor release channels. The challenge of optimizing fiber proportions and mix designs remains to minimize trade-offs between strength and workability. Future research should explore advanced fiber combinations, long-term environmental performance, and eco-friendly additives to expand the applicability of UHPC in sustainable infrastructure. This review underscores the potential of hybrid fibers to tailor UHPCs for diverse engineering demands while addressing current limitations.
超高性能混凝土（UHPC）因其卓越的力学性能和耐久性，已成为结构工程领域的一种革命性材料。本文综述全面研究了混杂纤维成分对超高性能混凝土的影响，重点关注力学性能和抗环境劣化性能。将钢纤维与合成纤维及玄武岩纤维结合的混杂纤维，通过弥合微裂缝和限制宏观裂缝扩展，提高了抗压强度、抗拉强度和抗弯强度。研究表明，钢纤维组合，尤其是那些具有不同长度和形状的组合，能显著提高延性和承载能力，而钢 - 合成纤维混杂则平衡了强度和柔韧性。然而，过多的合成纤维会降低抗压强度。玄武岩 - 合成纤维混杂虽然在抗压方面效果较差，但在抗拉强度和抗裂性方面表现出色。耐久性评估突出了超高性能混凝土对氯离子渗透、碳化、冻融循环和高温的卓越抗性，而混杂纤维进一步减轻了剥落和渗透性。例如，聚丙烯纤维通过形成蒸汽释放通道提高了耐火性。优化纤维比例和配合比设计的挑战依然存在，即要尽量减少强度和工作性之间的权衡。未来的研究应探索先进的纤维组合、长期环境性能和环保添加剂，以扩大超高性能混凝土在可持续基础设施中的适用性。本文综述强调了混杂纤维在满足当前限制的同时，为不同工程需求定制超高性能混凝土的潜力。
