中文摘要：

鉴于钢筋锈蚀氯离子临界浓度对钢筋混凝土结构的使用寿命有很大影响,从钢筋锈蚀氯离子临界浓度的表达形式、测试方法、影响因素等方面对国内外氯离子临界浓度的研究进展进行综述,给出了已有研究成果得到的氯离子临界浓度值和有关国家标准中限定的氯离子浓度,提出氯离子临界浓度的影响机理、测试方法、影响因素的耦合作用、计算模型和提高方法等有待进一步研究的问题.

英文摘要：

In consideration of the significant influence of thethreshold chloride concentration of reinforcing steel corrosion on the service lift of reinforced concrete structures, developments in research of threshold chloride concentration around the world are reviewed from the aspects of its expression, testing methods, and factors. Chloride threshold levels from previous research are presented, and the maximum allowable concentrations of chloride ions set as national standards in China are also provided. Some issues related to threshold chloride concentration are put forward for further research, including the influence mechanisms, testing methods, multi-factor coupling effect, and optimization of calculation models.