AN EXPERIMENTAL INVESTIGATION ON UNIAXIAL TENSILE, SLIP-BOND AND CREEP BEHAVIOR OF CARBON TEXTILE REINFORCED CEMENTITIOUS COMPOSITES (C-TRCC)

Date

2025-1-16

Author

Sharifi, Iraj

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

85
views

23
downloads

Cite This

Textile reinforced cementitious composite (TCRC) is an innovative composite material consisting of a non-metallic fabric mesh reinforcement and a fine-grained cementitious mortar and has been used as a repair and strengthening material in reinforced concrete and masonry structures over the last two decades. This study particularly aims to investigate the mechanical properties of a flexible grid-like woven carbon (C-) textile with two different cementitious mortars; M7, commonly used in TRCC production, and M45, a specialized mortar developed for Engineered Cementitious Composites (ECC®) with the absence of short discrete PVA fibers. The research aims to provide a comprehensive investigation on the mechanical performance and long-term tensile creep performance of such C-TRCC systems. A three-phase experimental program was conducted as part of this study. The first phase includes uniaxial direct tensile characterization and aims to understand the failure mechanisms of C-TRCC, focusing on the influences of yarn direction, reinforcement ratio, and mortar type. In the second phase, the slip bond performance of C-TRCC is evaluated with pull-out tests to determine the slip bond characteristics, focusing on the correlation between yarn direction, embedment lengths, yarn-mortar interaction, and failure modes. In the third phase, the tensile creep behavior is evaluated under sustained loading applied at different temperatures (20ºC, and 50ºC). Results revealed that the tensile performance of C-TRCC is significantly influenced by textile yarn architecture with warp yarns demonstrating higher tensile strength and failure resistance than weft yarns, attributed to their denser and more stable architecture. The slip-bond tests demonstrated a clear relationship between embedment length and pull-out load capacity, also underscores the importance of accurately characterizing textile geometry in order to reliably predict the developed shear strength within the C-TRCC. Finally, tensile creep tests under sustained loading and elevated temperatures (50°C) showed accelerated deformation, emphasizing the critical role of SBR coatings on yarns, which soften at higher temperatures, leading to reduced bonding performance.

Subject Keywords

Textile Reinforced Cementitious Composites (TRCC), Carbon Textile, Uniaxial Tensile Behavior, Slip-Bond Characteristics, Tensile Creep.

URI

https://hdl.handle.net/11511/113541

Collections

Graduate School of Natural and Applied Sciences, Thesis