期刊
CEMENT & CONCRETE COMPOSITES
卷 53, 期 -, 页码 162-169出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.cemconcomp.2014.07.003
关键词
Resistivity; Piezoresistivity; Strain sensing; Carbon nanotubes cementitious composites
资金
- National Strategic Reference Framework (NSRF)-Research Funding Program Thales-Democritus University of Thrace-Center for Multifunctional Nanocomposite Construction Materials - European Union (European Social Fund - ESF) [MIS 379496]
- Greek national funds through the Operational Program Education and Lifelong Learning
The self sensing properties of cementitious composites reinforced with well dispersed carbon nanotubes and carbon nanofibers were investigated. The electrical resistance of cementitious nanocomposites with w/c = 0.3 reinforced with well dispersed carbon nanotubes (CNTs) and nanofibers (CNFs) at an amount of 0.1 wt% and 0.3 wt% of cement was experimentally determined and compared with resistivity results of nanocomposites fabricated with as received nanoscale fibers at the same loading. Results indicate that conductivity measurements, besides being a valuable tool in evaluating the smart properties of the nanocomposites, may provide a good correlation between the resistivity values measured and the degree of dispersion of the material in the matrix. The addition of CNTs and CNFs at different loadings was proven to induce a decrease in electrical resistance, with the nanocomposites containing 0.1 wt% CNTs yielding better electrical properties. Furthermore, conductivity measurements under cyclic compressive loading provided an insight in the piezoresistive properties of selected nanocomposites. Results confirm that nanocomposites, reinforced with 0.1 wt% CNTs and CNFs, exhibited an increased change in resistivity, which is indicative of the amplified sensitivity of the material in strain sensing. (c) 2014 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据