Application of Plasma-Activated SiO₂-Epoxy Coated Functional Textile-Reinforced Composites in Building Structural Reinforcement

Guohua Cheng

Article
2026 / Volume 9 / Pages 1210-1233
Received 12 September 2025; Accepted 23 October 2025; Published 28 April 2026
https://doi.org/10.31881/TLR.2026.1210

Abstract
During long-term use in building structural reinforcement, conventional unmodified textile-reinforced composites (TRCs) often suffer from reduced bearing capacity and functional degradation due to bond failure between the fabric and concrete, making them unable to meet the durability and reliability requirements of modern building structures. This paper proposes a multifunctional composite reinforcement system integrating nano-modification with conductive textiles. Carbon fiber fabrics are plasma-treated and coated with a SiO₂-epoxy hybrid layer. These are then woven with stainless steel fibers into a smart grid, layered onto the bottom of concrete beams and impregnated with a modified cement matrix. After aging through hydrothermal cycles, flexural loading and electrical resistance monitoring are performed. Flexural tests on five replicate beams per group show the system effectively improves the structural flexural bearing capacity by over 105% compared to unreinforced beams. The degradation rate of the interfacial bond strength after aging is limited to 12%. The self-sensing sensitivity GF (Gauge Factor) exceeds 3.38, and the signal response is stable. The resulting multifunctional composite material combines high strength, durability, and functional monitoring, making it suitable for building reinforcement projects in long-term service environments.

Keywords
building structural reinforcement, textile-reinforced composites, nano-modified coatings, conductive mesh, bonding stability