Self-stress sensing smart concrete containing fine steel slag aggregates and steel fibers under high compressive stress

被引：87
作者：
Lee, Seon Yeol [1 ]
Huy Viet Le [1 ,2 ]
Kim, Dong Joo [1 ]
机构：
[1] Sejong Univ, Dept Civil & Environm Engn, 98 Gunja Dong, Seoul 143747, South Korea
[2] Hanoi Univ Min & Geol, Dept Civil Engn, Hanoi, Vietnam
来源：
CONSTRUCTION AND BUILDING MATERIALS | 2019年 / 220卷
关键词：
Electrical resistivity; Self-sensing; Fine steel slag aggregate (FSSA); Steel fiber; Smart concrete anchorage; ELECTRICAL-RESISTIVITY MEASUREMENTS; CEMENT-BASED COMPOSITES; REINFORCED-CONCRETE; IMPEDANCE SPECTRA; CARBON-BLACK; STRAIN; DAMAGE; BEHAVIOR; ABILITY; CNT;
D O I：
10.1016/j.conbuildmat.2019.05.197
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This study investigated the piezoelectric response of a smart concrete (MSF) containing fine steel slag aggregates (FSSAs) and steel fibers under high compression by measuring the alternative current impedance. The electrical resistivity of MSF notably decreased (15.65%) with the increase in the applied compressive stress from 20 to 100 MPa, whereas the electrical resistivities of smart concretes containing only FSSAs or steel fibers or both multiwalled carbon nanotubes and steel fibers reduced by 9.62, 12.37, and 9.30%, respectively. The MSF with a linear piezoelectric response under compression (until 60 MPa) was applied to a prestressing steel anchorage zone to monitor the loss of prestressing stress. (C) 2019 Elsevier Ltd. All rights reserved.
引用
收藏
页码：149 / 160
页数：12
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