摘要
将电化学再碱化应用于火灾受损后的混凝土结构,全面、深入地分析了再碱化对火灾受损后中性化混凝土碱性环境修复的机理;在此基础上对再碱化修复过程中各离子的迁移状况进行了研究;推导了各离子迁移数的理论模型,得到了再碱化过程中OH-和Na+浓度比与其迁移数的关系,并对再碱化修复过程中的导电原理做了分析研究。结果表明:电化学再碱化对中性化混凝土碱性环境的修复机理是电解、电渗、扩散和毛细管虹吸等共同作用的结果。该研究为实现电化学再碱化的控制提供了基础性理论依据。
Electrochemical realkalization was introduced and applied in fire damaged concrete structure. Based on an in-depth analysis of repair mechanism of restoring alkaline environment of fire damaged neutral concrete by realkalization technique, the behaviors of ionic transfer in the process of realkalization repair were studied. The theoretical model of ionic transfer quantity was derived, and the relations between concentration ratio and transference numbers of OH- and Na＋ during the realkalization were obtained. Moreover, the conductivity mechanism of realkalization repair was initially explored. The results show that the repair mechanisms of electrochemical realkalization for neutral concrete alkaline environment include electrochemistry, electroosmosis, diffusion and siphonage, etc. The research provides theoretical basis for the control theory of electrochemical realkalization.
出处
《建筑科学与工程学报》
CAS
北大核心
2013年第1期55-59,共5页
Journal of Architecture and Civil Engineering
基金
国家自然科学基金青年科学基金项目(50908088)
广州市珠江科技新星专项项目(2012J2200027)
亚热带建筑科学国家重点实验室自主研究课题资助项目(2012ZC26)
关键词
再碱化修复
火灾
混凝土
离子迁移
导电原理
realkalization repair
fire
concrete
ionic transfer
conductivity mechanism
