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Electromechanical Response of Smart Ultra-High Performance Concrete under External Loads Corresponding to Different
Min Kyoung Kim1, Huy Viet Le1,2, Dong Joo Kim1
1Department of Civil and Environmental Engineering, SEJONG University, 209, Neungdong-ro, Gwangjin-gu, Seoul 05006, Korea.
Abstract:
This study investigated the electromechanical response of smart ultra-high-performance concretes (smart UHPCs), containing fine steel slag aggregates (FSSAs) and steel fibers as functional fillers, under external loads corresponding to different measurement methods. Regardless of different measurement methods of electrical resistance, the smart UHPCs under compression showed a clear reduction in their electrical resistivity. However, under tension, their electrical resistivity measured from direct current (DC) measurement decreased, whereas that from alternating current (AC) measurement increased. This was because the electrical resistivity, from DC measurement, of smart UHPCs was primarily dependent on fiber crack bridging, whereas that from AC measurement was dependent on tunneling effects.
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