Pan Zengrui, Dang Faning, Tuladhar Rabin, Yin Shi, Shi Feng, To Peter, Tang Zisheng
State Key Laboratory of Eco-hydraulics in Northwest Arid Region of China, Xi'an University of Technology, Xi'an 710048, China.
College of Science and Engineering, James Cook University, Townsville, QLD 4811, Australia.
Materials (Basel). 2025 Apr 28;18(9):2002. doi: 10.3390/ma18092002.
This study investigates the use of Ultra-High Molecular Weight Polyethylene (UHMWPE) fibers and fabric to enhance the flexural performance of Ultra-High-Performance Concrete (UHPC). A total of 45 specimens were tested to examine the effects of fiber type, fabric material, adhesive, and various combined strengthening techniques. The main findings are that incorporating UHMWPE fiber into the ultra-high-strength mortar (HSM) matrix provides superior performance compared to steel fiber, particularly in enhancing crack resistance and energy absorption. UHMWPE fiber-reinforced UHPC achieved a flexural toughness of 307 KJ/m, over three times higher than that of steel fiber-reinforced UHPC (98 KJ/m). The use of UHMWPE fabrics was more effective in improving the ductility and toughness of the composites than the use of glass fabrics. The bonding effect of using epoxy resin with UHMWPE fabric is better than using magnesium phosphate cement (MPC). Increasing the number of fabric layers improved the flexural properties of externally bonded fabric but had no impact on internal reinforcement techniques. The best strengthening method in this study was a combination of incorporating UHMWPE fiber internally and externally bonded fabric on a concrete surface, yielding the highest toughness of 580 KJ/m.
本研究探讨了使用超高分子量聚乙烯（UHMWPE）纤维和织物来增强超高性能混凝土（UHPC）的弯曲性能。总共测试了45个试件，以研究纤维类型、织物材料、粘结剂以及各种组合增强技术的影响。主要研究结果表明，与钢纤维相比，在超高强砂浆（HSM）基体中掺入UHMWPE纤维具有更优异的性能，尤其是在增强抗裂性和能量吸收方面。UHMWPE纤维增强UHPC的弯曲韧性达到307 KJ/m，比钢纤维增强UHPC（98 KJ/m）高出三倍多。使用UHMWPE织物比使用玻璃织物在改善复合材料的延性和韧性方面更有效。环氧树脂与UHMWPE织物的粘结效果优于磷酸镁水泥（MPC）。增加织物层数可改善外部粘贴织物的弯曲性能，但对内部增强技术没有影响。本研究中最佳的增强方法是在混凝土内部掺入UHMWPE纤维并在混凝土表面外部粘贴织物，其韧性最高可达580 KJ/m。
