Alsuhaibani Eyad
Department of Civil Engineering, College of Engineering, Qassim University, Buraidah 52571, Saudi Arabia.
Polymers (Basel). 2025 May 4;17(9):1250. doi: 10.3390/polym17091250.
This research investigates the ultrasonic pulse velocity (UPV) and mechanical performance of epoxy-based polymer mortar (PM) reinforced with discrete fiber types to enhance structural behavior and promote sustainable construction practices. Four fiber types, polypropylene (PPF), natural date palm leaf fiber (DPL), glass fiber (GF), and carbon fiber (CF), were incorporated at varying volume fractions (0.5%, 1.0%, and 1.5%) into PM matrices. A total of thirteen mixtures, including a fiber-free control, were prepared. UPV testing was conducted prior to mechanical testing to evaluate internal quality and homogeneity, followed by compressive and flexural strength tests to assess structural performance. The results demonstrated that fiber type and dosage significantly influenced fiber-reinforced PM (FRPM) behavior. UPV values showed strong positive correlations with compressive strength for PPF, DPL, and CF, confirming UPV's role as a non-destructive quality indicator. GF at 0.5% yielded the highest compressive strength (54.4 MPa), while CF and GF at 1.5% provided the greatest flexural enhancements (15 MPa), indicating improved ductility and energy absorption. Quadratic regression models were developed to predict strength responses as functions of fiber dosage. Although statistical significance was not achieved due to limited sample size, models for PPF and CF exhibited strong predictive reliability. Natural fibers such as DPL demonstrated moderate performance while offering environmental advantages through local renewability and low embodied energy. The study concludes that low fiber dosages, particularly 0.5%, enhance mechanical performance and material efficiency in FRPMs. The findings underscore the potential of FRPM as a durable and sustainable alternative to traditional cementitious materials.
本研究调查了用离散纤维类型增强的环氧基聚合物砂浆（PM）的超声脉冲速度（UPV）和力学性能，以改善结构性能并促进可持续建筑实践。将四种纤维类型，即聚丙烯（PPF）、天然枣椰叶纤维（DPL）、玻璃纤维（GF）和碳纤维（CF），以不同的体积分数（0.5%、1.0%和1.5%）掺入PM基体中。总共制备了13种混合物，包括一种无纤维对照物。在进行力学测试之前进行UPV测试以评估内部质量和均匀性，随后进行抗压和抗弯强度测试以评估结构性能。结果表明，纤维类型和用量显著影响纤维增强PM（FRPM）的性能。对于PPF、DPL和CF，UPV值与抗压强度呈强正相关，证实了UPV作为无损质量指标的作用。0.5%的GF产生了最高的抗压强度（54.4MPa），而1.5%的CF和GF提供了最大的抗弯增强效果（15MPa），表明延展性和能量吸收得到改善。建立了二次回归模型来预测强度响应与纤维用量的函数关系。尽管由于样本量有限未达到统计学显著性，但PPF和CF的模型表现出很强的预测可靠性。像DPL这样的天然纤维表现出中等性能，同时通过本地可再生性和低隐含能量提供环境优势。该研究得出结论，低纤维用量，特别是0.5%，可提高FRPM的力学性能和材料效率。研究结果强调了FRPM作为传统胶凝材料的耐用且可持续替代品的潜力。
