中文摘要：

通过自然扩散法研究了在持续压荷载作用下试验时间、荷载等级、养护条件对混凝土中氯离子渗透规律的影响。试验结果表明：在一定时间段内，随着试验时间的延长，氯离子渗透能力增加，渗透速度减慢；随着荷载等级的增大，氯离子含量有先增大后减小的趋势，对于中间转折点的确定还有待进一步研究；氢氧化钙溶液中养护的试块与恒温恒湿养护箱养护的试块同等条件下相比氯离子含量更大。该研究结果对处于多因素耦合环境中的混凝土耐久性设计及寿命预测具有一定指导意义。

英文摘要：

This paper studies the influence law of permeability of chloride ion in concrete of experi-ment time, load level, curing condition under the sustained pressure load, which is through natural diffusion method. Experiment results show that with the extension of the test time, chloride ion per-meability increases,penetration rate slows. As the load level increases, there is a tendency of the chloride ion content after the first increase and then decrease, the turning point in the middle re-mains to be further studied. The content of chloride ion of test blocks which are cured in calcium hy-droxide solutiong is greater than that cured in constant temperature and humidity box under the same conditions. The research results have a certain significance for concrete durability design and life prediction in Multi-factor coupling conditions.