Using electrically conductive concrete (ECC) for grounding applications

Grounding in structures especially those which require good grounding such as central offices, electrical power stations, residential buildings . . . . . . etc, is a crucial issue. Conventional grounding systems could be in some cases ineffective, and could cause great deal of damage in such structures. Besides, traditional grounding systems are prone to damage due to natural processes, and human behavior (i.e. cutting or theft). In this study, the effect of using conductive fillers such as steel shavings, carbon powder and graphite powder as partial replacement of fine aggregate (1, 3, 5 and 7% by volume) on the electrical conductivity of concrete is being investigated. The electrical resistance properties using DC and AC (50Hz) in addition to the properties of fresh and hardened concrete were measured. The results of this study showed the possibility of producing structural concrete with good electrical conductivity properties that could be used in parts of the structures to provide the grounding system required. The electrically conductive concrete (ECC) will enhance the grounding system of structures compared to conventional systems with its high capacity to absorb transient surges, and its larger conductive area compared to the conventional system. Also, the produced electrically conductive concrete (ECC) has several advantages as being permanent and maintenance free, cost effective, easy to install, environmentally safe and virtually theft proof.