中文摘要：

混凝土碳化是引起钢筋混凝土结构中钢筋锈蚀的主要原因之一。再碱化应用电化学和电渗原理，恢复钢筋周围混凝土的高pH值，使钢筋重新钝化，以达到防止钢筋锈蚀的目的。在对再碱化后混凝土中碳酸钠的反向扩散过程进行合理简化的基础上，利用菲克第二定律建立了再碱化后混凝土的耐久性计算模型。

英文摘要：

Concrete carbonization is one of the main causes of reinforcement corrosion in reinforced concrete structaares.ln the realkalization, principles of the electrolysis and eletroosmosis are applied, which serve to recover the pH value of the concrete around the steel and thus to prevent the corrosion of the steel.Regarding analyzing and simplifying the density development of sodium carbonate in realkalized concrete reasonably, the durability longevity theoretical model of the realkalization is established based on Fick＇s second law of diffusion.