中文摘要：

运用压汞测孔法（MIP）对影响电化学再碱化混凝土的微观结构主次因素进行实验研究，结果表明，电流密度的影响最大，其次是再碱化时间和电解质溶液浓度．本试验最优电化学再碱化组合是电流密度为3A／m^2，采用1mol／L的电解质溶液，再碱化时间为14d．对于标准养护、实验室加速完全碳化以及实施再碱化修复的混凝土孔隙率的测定结果表明，再碱化对混凝土的总孔隙率和孔径分布的影响都很大，混凝土的累积孔隙体积有所减少，孔径分布偏向于凝胶孔，且其微观结构均匀密实，说明再碱化可以改善混凝土的孔结构，提高混凝土的耐久性能．

英文摘要：

The primary and secondary factors influencing the microstructure of concrete after electrochemical realkalization were investigated by MIP. The results show that current density has the largest effect ,the second is the electrify time and concentration of solution. When an electrolyte composed of 1 mol/L solution,electrify time of 14 days and electrical current density of 3 A/m^2 was adopted,the best efficiency was achieved. Experimental measurements of porosity in standard specimen, completely carbonated specimen and the realkalization specimens indicate： realkalization has a large impact on the pore size distribution and porosity of the concrete. The total pore volume decreased,gel pores covered the majority of the total, and the pore structure became very compact. It indicated that realkalization can improve pore structure as well as the durability of the concrete.