Enhanced Young's Modulus in Percolative Cementitious Composites Reinforced with Carbon Nanotubes

被引:0
作者
Konsta-Gdoutos, Maria S. [1 ]
Danoglidis, Panagiotis A. [1 ]
Falara, Maria G. [1 ]
Maglogianni, Myrsini E. [1 ]
Gdoutos, Emmanuel E. [2 ]
机构
[1] Democritus Univ Thrace, Sch Engn, GR-67100 Xanthi, Greece
[2] Acad Athens, Athens 10679, Greece
来源
PROCEEDINGS OF THE FIRST INTERNATIONAL CONFERENCE ON THEORETICAL, APPLIED AND EXPERIMENTAL MECHANICS | 2019年 / 5卷
关键词
Young's modulus; Mortar; Carbon nanotubes; Percolation threshold; ASPECT RATIO;
D O I
10.1007/978-3-319-91989-8_7
中图分类号
O3 [力学];
学科分类号
08 ; 0801 ;
摘要
The modulus of elasticity, resistivity and capacitive reactance were determined for carbon nanotube reinforced mortars, near percolation. It is shown that the abrupt decrease of the resistivity values observed at the CNT content of 0.1 wt% is associated with the onset of percolation. Mortars reinforced with 0.1 wt% CNTs exhibit an 89% increase in Young's modulus. Values of resistivity and capacitance are 27% and 90% lower than that of the plain mortar, respectively. After the conductive network is formed, resistivity values show a little dependence on the CNT content, reaching a plateau. Capacitance on the other hand was increased by an order of magnitude, showing an amplified energy storage ability, probably due to the existence of small CNT agglomerates. The observed relationship between capacitance values and modulus of elasticity may provide valuable information on the actual CNT dispersion state in the matrix.
引用
收藏
页码:38 / 43
页数:6
相关论文
共 8 条
[1]   Cement-based sensors with carbon fibers and carbon nanotubes for piezoresistive sensing [J].
Azhari, Faezeh ;
Banthia, Nemkumar .
CEMENT & CONCRETE COMPOSITES, 2012, 34 (07) :866-873
[2]   Strength, energy absorption capability and self-sensing properties of multifunctional carbon nanotube reinforced mortars [J].
Danoglidis, Panagiotis A. ;
Konsta-Gdoutos, Maria S. ;
Gdoutos, Emmanuel E. ;
Shah, Surendra P. .
CONSTRUCTION AND BUILDING MATERIALS, 2016, 120 :265-274
[3]   Portland cement mortar nanocomposites at low carbon nanotube and carbon nanofiber content: A fracture mechanics experimental study [J].
Gdoutos, Emmanuel E. ;
Konsta-Gdoutos, Maria S. ;
Danoglidis, Panagiotis A. .
CEMENT & CONCRETE COMPOSITES, 2016, 70 :110-118
[4]   Circuit elements in carbon nanotube-polymer composites [J].
Hsu, WK ;
Kotzeva, V ;
Watts, PCP ;
Chen, GZ .
CARBON, 2004, 42 (8-9) :1707-1712
[5]   Fresh and mechanical properties, and strain sensing of nanomodified cement mortars: The effects of MWCNT aspect ratio, density and functionalization [J].
Konsta-Gdoutos, Maria S. ;
Danoglidis, Panagiotis A. ;
Falara, Maria G. ;
Nitodas, Stephanos E. .
CEMENT & CONCRETE COMPOSITES, 2017, 82 :137-151
[6]   Multi-scale mechanical and fracture characteristics and early-age strain capacity of high performance carbon nanotube/cement nanocomposites [J].
Konsta-Gdoutos, Maria S. ;
Metaxa, Zoi S. ;
Shah, Surendra P. .
CEMENT & CONCRETE COMPOSITES, 2010, 32 (02) :110-115
[7]   Correlations between percolation threshold, dispersion state, and aspect ratio of carbon nanotubes [J].
Li, Jing ;
Ma, Peng Cheng ;
Chow, Wing Sze ;
To, Chi Kai ;
Tang, Ben Zhong ;
Kim, Jang-Kyo .
ADVANCED FUNCTIONAL MATERIALS, 2007, 17 (16) :3207-3215
[8]  
Shah S.P., 2016, United States Patent, Patent No. [9,499,439 (B2), 9499439]