电化学修复对混凝土微观结构影响的研究综述  

Review of the effect of electrochemical treatment on microstructure of concrete

作　　者：沈灵 夏晋 张晖[1] SHEN Ling;XIA Jin;ZHANG Hui(Department of Cultural Heritage and Museology,Zhejiang University,Hangzhou 310028,China;School of Civil Engineering and Architecture,Zhejiang University,Hangzhou 310028,China)

机构地区：[1]浙江大学文物与博物馆学系,浙江杭州310028 [2]浙江大学建筑工程学院,浙江杭州310028

出　　处：《混凝土》2020年第4期23-28,共6页Concrete

基　　金：浙江省文物保护科技项目(2016009);中央高校基本科研业务费。

摘　　要：电化学修复技术是提高钢筋混凝土结构耐久性的重要方法。目前国内外的研究都主要集中于电化学处理对钢筋锈蚀起到的保护作用,而已有研究提出电化学处理会改变混凝土的微观结构和组成,由此可能引起混凝土耐久性和力学性质的变化。梳理总结了电化学除氯法、再碱化法和新型双向电迁移法对混凝土微观结构产生的影响。电化学修复法对微观结构的影响有相似规律,电解液和通电参数等因素对混凝土的影响程度不同。今后需要加强电化学修复对混凝土微观结构和混凝土宏观性质影响的综合研究。Electrochemical treatment is an important technique in the improvement of the durability of reinforced concrete structures.Studies available in the literature mainly concentrate on the anti-corrosion protection of rebar,in fact it has been reported that the microstructure of concrete would be altered after electrochemical treatment.The micro-characteristic is a significant factor that may cause the change of durability and mechanical property of concrete.It reviewed recent studies that focused on the influence of rehabilitation treatments including electrochemical chloride extraction,realkalisation,and the new bidirectional electro-migration method on concrete microstructure.These electrochemical treatment techniques affect the micro-characteristics in similar mechanism.The electrolyte,parameter applied in electrochemical treatment may lead to different levels of change on microstructures of concrete via various chemical reactions.Further studies are required to focus on the micro and macro characteristics of concrete are required after application of electrochemical treatments.

关 键 词：混凝土 微观结构 电化学除氯 电化学再碱化 双向电迁移 

分 类 号：TU528.01[建筑科学—建筑技术科学]