탄소나노튜브 혼입 고전도성 시멘트 복합재료를 활용한 콘크리트 구조물의 균열 및 염소 침투 센싱 가능성 검토

Abstract

Preliminary study on the utilization of CNT/cement composite as a sensor for chloride penetration and concrete crack monitoring in reinforced concrete structures was carried out. CNT/cement composite has higher electrical conductivity than normal water and has less electrical conductivity than chloride solution. When the CNT/cement composite is embedded or attached to the concrete structure, the electrical conductivity of the CNT/cement composite is not influenced by the surrounding humidity of the structure. However, the electrical conductivity of the CNT/cement composite is likely to change by the penetrated chloride solution and cracks of it. In the present study, CNT/cement composite were prepared by the different chloride contents. The changes of electrical conductivity of CNT/cement composites induced by chloride contents were measured. In addition, the changes of electrical conductivity of CNT/cement composite induced by the crack widths in CNT/cement composite with no chloride content were measured.