Uniaxial tensile performance in the warp and weft directions of carbon textile reinforced concretes with two different matrices

Date

2025-05-23

Author

Sharifi, Iraj
Sherzai, M. Hamahang
Javanmard, Arsalan
Yalçındağ, Furkan
Yaman, İsmail Özgür

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Textile-Reinforced Concrete (TRC) has emerged as a promising material for both strengthening existing structures and constructing new, innovative thin-shell structures. As a result, in literature the uniaxial direct tensile performance of textile-reinforced concrete has been extensively studied. However, most of these studies have considered the warp direction of the textile as the primary loading direction. Understanding the mechanical performance of TRC in both the warp and weft directions is essential for practical applications. This study investigated the uniaxial tensile behavior of Carbon Textile Reinforced Concrete (C-TRC) using a grid-like woven carbon textile impregnated with styrene-butadiene rubber in both the warp and weft directions, using two different cementitious mortar systems. The results showed that there are significant differences in the elongation capacity, tensile strength and failure mechanisms between the two test directions. C-TRC specimens tested in the warp direction exhibited superior performance, fully utilizing the textile strength (around 2200 MPa) and achieving higher elongation (approximately 3 %) due to the telescopic pull-out phenomenon observed in C-TRC. In contrast, in the weft direction, the slippage of the textile was observed, resulting in an under-utilisation of the strength capacity of the textile with a lower elongation capacity of around 1 %. Spalling of the cover mortar was also observed in this direction. The higher-strength mortar (Mix B) mitigated spalling and improved performance up to a textile stress around 1500 MPa, compared to the lower-strength mortar (Mix A), which reached a maximum textile stress around 1000 MPa. The anisotropic behavior of C-TRC, characterized by yarn waviness and geometric discrepancies between the warp and weft directions, was verified through advanced experimental techniques such as 3D laser scanning and scanning electron microscopy (SEM) imaging. These techniques enabled a detailed analysis of failure mechanisms and the impact of yarn architecture and mortar properties on the overall performance of C-TRC.

Subject Keywords

Carbon Textile Reinforced Concrete, Slippage of Textile, Telescopic Pull-Out Phenomenon, Weft and Warp Direction of Textile

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=105002585819&origin=inward
https://hdl.handle.net/11511/114322

Collections

Department of Civil Engineering, Article