El-Feky M S, Badawy Amr H, Seddik Khaled Mohamed, Yahia Sarah
Civil Engineering Department, Engineering & Renewable Energy Research Institute, National Research Centre, Giza, Egypt.
Clothing and Knitting Industrial Research Department, Textile Research and Technology Institute, National Research Centre, Giza, Egypt.
Sci Rep. 2024 Nov 6;14(1):26907. doi: 10.1038/s41598-024-76729-8.
This research scrutinized the effectiveness of utilizing polyester high tenacity fabrics to enhance the functionality of concrete panels. Two distinct woven fabrics with comparable strength resistance were fabricated and assessed. Concrete beams were compared in their original form and those reinforced with woven fabrics, along with beams reinforced with carbon nanotubes (CNTs) (B, BC2, BC4, BS1, and BS2). Results indicated that the textile-reinforced concrete panels displayed notably greater energy absorption capabilities post-failure under flexural loads in comparison to the control and CNT-reinforced panels. This enhanced performance was credited to the development of multiple cracking patterns in the textile-reinforced panels. The flexural behavior of the textile-reinforced panels was characterized by four discernible phases: a linearly increasing segment, a crack propagation phase featuring multiple cracking, a post-cracking phase with reduced stiffness, and ultimately, failure due to fabric rupture or debonding. Conversely, the control and CNT-reinforced panels exhibited a more brittle response post-initial cracking, with a limited number of cracks and reduced deformation capacity. The performance of the textile samples was largely unaffected by their specific characteristics, except for the fabric wrapping angle. The introduction of 0.04% CNTs marginally enhanced crack flexural resistance compared to the control and 0.02% CNT panels, owing to the varied distribution of CNTs within the matrix. Overall, the textile-reinforced concrete panels demonstrated superior load-bearing capacity, ductility, and energy absorption when compared to the other reinforcement techniques examined.
本研究详细考察了使用聚酯高强力织物来增强混凝土板功能的有效性。制作并评估了两种具有相当强度抗性的不同机织织物。将混凝土梁的原始形式与用机织织物增强的梁以及用碳纳米管（CNT）增强的梁（B、BC2、BC4、BS1和BS2）进行了比较。结果表明，与对照板和碳纳米管增强板相比，纺织增强混凝土板在弯曲载荷作用下失效后表现出显著更高的能量吸收能力。这种增强的性能归因于纺织增强板中出现的多种裂缝模式。纺织增强板的弯曲行为具有四个可识别的阶段：线性增加段、具有多次开裂的裂缝扩展阶段、刚度降低的开裂后阶段，以及最终由于织物破裂或脱粘导致的失效。相反，对照板和碳纳米管增强板在初始开裂后表现出更脆的响应，裂缝数量有限且变形能力降低。除了织物包裹角度外，纺织样品的性能在很大程度上不受其特定特性的影响。与对照板和0.02%碳纳米管板相比，引入0.04%的碳纳米管略微提高了裂缝弯曲抗性，这归因于碳纳米管在基体中的分布不同。总体而言，与所研究的其他增强技术相比，纺织增强混凝土板表现出卓越的承载能力、延展性和能量吸收能力。
