Flexural design of textile-reinforced concrete (TRC) using warp-knitted fabric with improving fiber performance index (FPI)

Bending capacity of textile-reinforced concrete (TRC) is often limited by low penetration of the concrete into inner filaments of fabric rovings. To improve this limitation, we used warp-knitted fabric with different rovings as weft inserted then introduce a fibers performance index (FPI) as sign of the textile reinforcing efficiency. On the base of equilibrium condition models and comparing with experimental data, the FPI is simulated. The influence of different number of rovings and also different layers, on the maximum load, displacement, toughness, and failure modes is discussed. Furthermore, the FPI was improved by partially impregnated fabrics with spotted epoxy. This technique considerably increased FPI from 0.21 for the fabric without epoxy to 0.5 and improved bending properties of TRC.