Electrical properties of smart ultra-high performance concrete under various temperatures, humidities, and age of concrete

被引：39
|
作者：
Huy Viet Le [1 ,2 ]
Kim, Min Kyoung [1 ]
Kim, Dong Joo [1 ]
Park, Jongwoong [3 ]
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
[3] Chung Ang Univ, Sch Civil & Environm Engn, Seoul 06974, South Korea
来源：
CEMENT & CONCRETE COMPOSITES | 2021年 / 118卷
基金：
新加坡国家研究基金会;
关键词：
Smart UHPC; Impedance spectroscopy; Temperature; Humidity; Age; SELF-SENSING CONCRETE; CARBON-FIBER; CEMENTITIOUS COMPOSITES; REINFORCED-CONCRETE; IMPEDANCE SPECTRA; STEEL FIBERS; RESISTIVITY; RESISTANCE; STRAIN; MATRIX;
D O I：
10.1016/j.cemconcomp.2021.103979
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This study investigates the effects of temperature, relative humidity, and storage age on the electrical properties of smart ultra-high performance concretes (UHPCs) with different functional fillers (FFs) and free water content (FWC) for the practical application purpose by measuring impedance spectroscopy. As the temperature increased from 0 to 40 degrees C, the electrical resistivity of smart UHPCs clearly decreased (approximately 2.27% per oC). However, the FWC effect on the temperature sensitivity was limited. The smart UHPCs with fiber type FFs (steel fibers) produced slightly higher temperature sensitive than that with particle type FFs (fine steel slag aggregates). The effect of change in relative humidity (20-80%) on the change in electrical resistivity of smart UHPCs was little owing to high density of matrices. The electrical resistivity of smart UHPCs clearly decreased until 21 days and then little changed until 180 days owing to change of FWC in matrices.
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页数：14
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