Enhancing self-stress sensing ability of smart ultra-high performance concretes under compression by using nano functional fillers

被引：45

作者：

Huy Viet Le ^{[1
,2
]}

Kim, Min Kyoung ^{[1
]}

Kim, Seon Uk ^{[1
]}

Chung, Sang-Yeop ^{[1
]}

Kim, Dong Joo ^{[1
]}

机构：

[1] Sejong Univ, Dept Civil & Environm Engn, 209 Neungdong Ro, Seoul 143747, South Korea

[2] Hanoi Univ Min & Geol, Dept Civil Engn, Hanoi, Vietnam

来源：

JOURNAL OF BUILDING ENGINEERING | 2021年 / 44卷

关键词：

Smart ultra-high-performance concrete (S-UHPC); Self-sensing; Steel slag aggregate; Nickel aggregate; Copper aggregate; MWCNT; CEMENT-BASED COMPOSITES; FIBER-REINFORCED CONCRETE; ELECTRICAL-PROPERTIES; CARBON-BLACK; STEEL-FIBER; IMPEDANCE SPECTRA; DAMAGE; RESISTIVITY; RESISTANCE; MOISTURE;

D O I：

10.1016/j.jobe.2021.102717

中图分类号：

TU [建筑科学];

学科分类号：

0813 ;

摘要：

Smart ultra-high performance concretes (S-UHPCs) with high self-stress sensing abilities have great application potential for monitoring the loss of prestressing stress in steel tendons to predict structural failure. This study aimed to enhance the self-stress sensing ability of compressed S-UHPCs by employing different types of electrically conductive functional fillers, including fiber type (short smooth steel fibers), particle type (fine steel slag aggregates, FSSAs; nickel aggregates, NAs; and copper aggregates, CPAs), and nano type (multiwall carbon nanotubes, MWCNTs). The S-UHPCs containing CPAs exhibited the highest electrical conductivity due to the high electrical conductivity of the CPAs. However, the S-UHPCs containing a combination of steel fibers, FSSAs, and MWCNTs produced the highest fractional change in electrical resistivity (56.8%) and stress sensitivity coefficient (0.41%/MPa).

引用

页数：14

共 56 条

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