Abstract:To study the effect of interface modification and temperature on the interface performance of Textile Reinforced Concrete (TRC), the textile surface with epoxy resin, silane coupling agent and nano-silica(SiO2)were treated, respectively. The scanning electron microscope, and pull-out test were conducted to study the micromorphology and macro-mechanical properties of TRC specimens at 25 ℃, 100 ℃, and 200 ℃. The test results show that both nano-SiO2 impregnation and epoxy resin coating can significantly improve the interfacial properties between carbon fiber and the cement matrix. Nano-SiO2 particles can be immersed into the fiber bundle, which improves the stress transfer between the internal fiber filaments and the matrix, and nano-SiO2 reacts with calcium hydroxide to form a calcium silicate hydrate gel, which improves its bonding performance. The silane coupling agent treatment can increase the surface roughness of the fiber, enhance the amount of nano-SiO2 adhered to the fiber, and then improve the bonding strength along the interface with the cement base. The interfacial strength of carbon fiber bundles impregnated with nano-SiO2 at 100 ℃ and 200 ℃ was significantly higher than that impregnated with epoxy resin. This study can provide a reference for TRC mechanical properties design and thermal stability improvement methods.