Ion-transport characteristics of new-old concrete composite system

查看全文 作　　者：[1]龙广成;[1]谢友均;[1]丁巍巍;Ahmed [2]OMRAN

机构地区：[1]School of Civil Engineering,Central South University;[2]Université de Sherbrooke

出　　处：《Journal of Central South University》索引2014年第21卷第2期,共9页

基　　金：Project(2013CB036201)supported by the National Basic Research Program of China;Project(51178467)supported by National Natural Science Foundation of China;Project(NCET-10-0839)supported by Program for New Century Excellent Talents in University,China 摘　　要：New-old concrete composite system usually exists in concrete repairing structure.In the present work,series of experiments were carried out to investigate permeability and ion diffusion properties of new-old concrete composite by measuring 6-hour coulomb charge and chloride diffusivity.The interrelation among transport properties of new-old composites,new,and old concretes was also discussed.Results indicate that the permeability and chloride diffusivity of new-old concrete composite system closely interrelate to the corresponding new concrete and old concrete.The interfacial transition zone between new concrete and old concrete greatly influences the transport property of new-old concrete system.Compared with the corresponding new concrete and old concrete lower permeability and diffusivity values for the new-old concrete composites can be achieved by choosing suitable new concrete.It is possible to design the tailor-made new-old concrete composite system for repair given the transport property. 关键词：氯离子扩散系数新老混凝土传输特性复合体系混凝土复合材料复合系统扩散性能混凝土修补

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Ion-transport characteristics of new-old concrete composite system

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