(1189)--Self-stress sensing smart concre建筑材料学建筑材料学.pdf

Construction and Building Materials 220 (2019) 149–160 Contents lists available at ScienceDirect Construction and Building Materials journal homepage: /lo cate/conbuildmat Self-stress sensing smart concrete containing fine steel slag aggregates and steel fibers under high compressive stress Seon Yeol Lee a, Huy Viet Le a,b, Dong Joo Kim a,⇑ a Department of Civil and Environmental Engineering, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul 143-747, South Korea b Department of Civil Engineering, Hanoi University of Mining and Geology, Hanoi, Viet Nam h i g h l i g h t s MSF containing FSSAs and steel fibers produced great piezoelectric response. The electrical resistivity reduction of MSF was clearly higher than that of other smart concretes. Smart anchorage using MSF was applied to prestressing steel anchorage zone to monitor the loss of prestressing stress. An equation correlating stress and electrical resistivity of smart anchorage was obtained. a r t i c l e i n f o a b s t r a c t Article history: This study investigated the piezoelectric response of a smart concrete (MSF) containing fine steel slag Received 25 March 2019 aggregates (FSSAs) and steel fibers under high compression by measuring the alternative current impe- Received in revised form 27 May 2019 dance. The electrical resistivity of MSF notably decreased (15.65%) with the increase in the applied com- Accepted 31 May 2019 pressive stress from 20 to 100 MPa, whereas the electrical resistivities of smart concretes containing only