Textile-reinforced concrete (TRC) is suitable to repair and reinforce concrete structures in harsh environments. The performance of the interface between TRC and existing concrete is an important factor in determining the strengthening effect of TRC. In this paper, a double-sided shear test was performed to investigate the effects of the chloride dry-wet cycles on the average shear strength and slip at the interface between the TRC and existing concrete, also considering the existing concrete strength, bond length, textile layer and short-cut fiber arrangements. In addition, X-ray diffraction (XRD) technology was used to analyze the microscopic matter at the interface in the corrosive environment. The experimental results indicate that the interface performance between TRC and existing concrete would decrease with continued chloride dry-wet cycles. Compared with the specimen with a single layer of textile reinforcement, the specimens with two layers of textile with added PVA or AR-glass short-cut fibers could further improve the properties of the interface between the TRC layer and existing concrete. For the TRC with a single layer of textile, the average shear strength tended to decrease with increasing bond length. In addition, the strength grade of the existing concrete had a minor effect on the interface properties.

纺织品增强混凝土（TRC）适用于在恶劣环境下修复和增强混凝土结构。TRC与现有混凝土之间的界面性能是决定TRC加固效果的重要因素。本文进行了双面剪切试验，研究了氯化物干湿循环对TRC与现有混凝土之间界面的平均剪切强度和滑移的影响，同时还考虑了现有混凝土的强度，粘结长度，纺织层和短纤维排列。此外，还使用X射线衍射（XRD）技术分析了腐蚀性环境中界面处的微观物质。实验结果表明，随着氯化物干湿循环的进行，TRC与现有混凝土之间的界面性能将降低。与具有单层织物增强材料的标本相比，具有两层织物并添加PVA或AR玻璃短切纤维的标本可以进一步改善TRC层与现有混凝土之间的界面性能。对于具有单层织物的TRC，平均剪切强度倾向于随着粘合长度的增加而降低。另外，现有混凝土的强度等级对界面性能影响很小。