中文摘要：

从测试方法、养护条件、氯离子含量、掺合料品种等方面研究采用模拟海水拌合的超高性能混凝土基体氯离子的结合特性。试验结果表明：由于高温使UHPC基体中Friedel盐分解，试样干燥温度为100℃时的自由氯离子含量比50℃的高；早期高温湿养降低了最终UHPC基体中氯离子的结合；随着龄期的增长，氯离子的结合逐渐增大；且氯离子的含量越高，氯离子的结合度也越大；掺合料的组成方面，硅灰的加入降低了C-S-H凝胶的钙硅比值及基体的pH值、稀释了铝酸三钙而降低UHPC基体中氯离子的结合；粉煤灰中较高含量的氧化铝促进了UHPC基体中氯离子的结合；偏高岭土富含的氧化铝与氯离子可以加速反应生成Friedel盐，从而促进UHPC基体中氯离子的结合。

英文摘要：

The paper studied the binding property of chloride in ultra high performance concrete matrix which was mixed with simulate seawater from test method, curing condition, chloride content, and admixture composi-tion. The result shows：High temperature decomposed the Friedel salt and final the free chloride content at 100 degree was higher than that at 50 in sample. Early high temperature humidity curing will reduce the final chloride binding. However, with the increase of age, the chloride binding will increase gradually. The more chloride is added, the greater the degree of chloride binding. For the composition of admixture, the addition of silica fume will lead to decreased of the calcium silicon ratio of C-S-H gel and the pH value. Meanwile, it will also cause the dilution of three calcium because of the decrease of chloride binding in UHPC matrix. The higher alumina content in fly ash promotes the chloride binding in UHPC. For metakaolin, the chloride can accelerate the forma-tion of Friedel salt which can promotes the chloride binding in UHPC matrix.