Bond Behavior in Carbon and Basalt Textile-Reinforced Mortar Composites
摘要
Textile Reinforced Mortar (TRM) composites have emerged as promising strengthening solutions for masonry and concrete structures. However, composite performance is highly governed by bond characteristics between textile reinforcement and mortar matrix, making the understanding of stress transfer mechanisms crucial for design optimization and structural applications. The present study investigates the textile-matrix bond characteristics of two different textile reinforcements embedded in mortar matrix through experimental pull-out testing. Carbon textiles (uncoated) and basalt textiles (SBR-coated) were examined with varying bond lengths of 40, 80, and 120 mm to evaluate the influence of embedment length on bond performance. Pull-out tests were conducted using TRM coupons where the applied load was transferred directly from the composite system to the textile fibers rather than directly to the textile, providing a more realistic representation of stress transfer mechanisms encountered in real-case strengthening applications. Experimental results demonstrate the critical role of bond in TRM composite performance and reveal distinct characteristics between the two textile types. The uncoated carbon textiles and coated basalt textiles exhibited different bond-slip relationships influenced by their surface properties and textile-matrix interaction mechanisms. Bond stress and effective bond lengths were successfully determined for both textile materials, providing essential design parameters for practical applications.