Improved piezoresistive sensitivity and stability of CNT/cement mortar composites with low water–binder ratio
Source abstract
Abstract
Abstract In previous studies by the authors, it was found that a lower water–binder ratio led to enhanced dispersion of carbon nanotube (CNT) in the cement matrix. The objective of this study was to investigate the piezoresistive sensitivity and stability of CNT/cement mortar composites with low water–binder ratio. The effect of absorbed water on the piezoresistivity of the composites was also investigated, since it strongly affects the electrical properties of the composites. The changes in the electrical resistance of composite specimens induced by external cyclic loading were measured to investigate their piezoresistive sensitivity and stability. The experimental results indicates that the stability of piezoresistivity under cyclic loading and their time-based sensitivity can be improved by decreasing the water–binder ratio of the cement composites. Moreover, the variation of piezoresistivity induced by the moisture content can be decreased by low water–binder ratio.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Smart Materials for Construction · Concrete Corrosion and Durability · Advanced Energy Technologies and Civil Engineering Innovations
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (30)
Show source-provided references
1. Wireless and embedded carbon nanotube networks for damage detection in concrete structures10.1088/0957-4484/20/39/395502 ↗
2. Lee HK, Nam IW. Conductive cement matrix composites with carbon nanotube (CNT) and nanoparticles, Composites 2013, Orlando, FL, USA; January 29–31, 2013.
3. Cement-based sensors with carbon fibers and carbon nanotubes for piezoresistive sensing10.1016/j.cemconcomp.2012.04.007 ↗
4. A carbon nanotube/cement composite with piezoresistive properties10.1088/0964-1726/18/5/055010 ↗
5. Effect of moisture on piezoresistivity of carbon fiber-reinforced cement paste
6. Embedded piezoresistive cement-based stress/strain sensor10.1016/j.sna.2007.05.011 ↗
7. A self-sensing carbon nanotube/cement composite for traffic monitoring10.1088/0957-4484/20/44/445501 ↗
8. Electrode design, measuring method and data acquisition system of carbon fiber cement paste piezoresistive sensors10.1016/j.sna.2006.08.003 ↗
9. Piezoresistivity in continuous carbon fiber cement–matrix composite10.1016/S0008-8846(98)00211-7 ↗
10. Conductivity of carbon fiber reinforced cement-based composites10.1016/S0958-9465(02)00138-5 ↗
11. Tuan CY. Conductive concrete for bridge deck deicing and anti-icing, Technical Report, Nebraska Department of Road, No. SPR-PL-1(037); 2004.
12. Tuan CY, Yehia SA. Implementation of conductive concrete overlay for bridge deck deicing at Roca, Nebraska, Transportation Research E-Circular, No. E-C063; 2004. p. 363–378.
13. Effect of compressive strain on electrical resistivity of carbon black-filled cement-based composites10.1016/j.cemconcomp.2006.05.004 ↗
14. Partial replacement of carbon fiber by carbon black in multifunctional cement–matrix composites10.1016/j.carbon.2006.10.024 ↗
15. Electrically conductive cement-based materials10.1680/adcr.2004.16.4.167 ↗
16. Jeon JH, Lee HK. Electrical characteristics of carbon nanotube/cement composite. In: The 24th KKCNN symposium on civil engineering (KKCNN’11). Kyoto, Japan; December 14–16, 2011.
17. Electrical resistivity as a measure of change of state in substrates: design, development and validation of an automated system10.1016/j.measurement.2010.09.040 ↗
18. Physical properties of seawater: a new salinity scale and equation of state for seawater10.1029/JC090iC02p03332 ↗
19. Effects of high volume of fly ash, blast furnace slag, and bottom ash on flow characteristics, density, and compressive strengths of high-strength mortar10.1061/(ASCE)MT.1943-5533.0000624 ↗
20. Flow, water absorption, and mechanical characteristics of normal- and high-strength mortar incorporating fine bottom ash aggregates10.1016/j.conbuildmat.2011.06.019 ↗
21. Electromagnetic characteristics of cement matrix materials with carbon nanotubes
22. Influence of silica fume additions on electromagnetic interference shielding effectiveness of multi-walled carbon nanotube/cement composites10.1016/j.conbuildmat.2011.11.025 ↗
23. Enhanced effect of carbon nanotube on mechanical and electrical properties of cement composites by incorporation of silica fume10.1016/j.compstruct.2013.07.042 ↗
24. Jeon JH. An experimental study on electrical resistance behavior of carbon nanotube/cement composite [Master thesis]. Korea Advanced Institute of Science and Technology; 2012.
25. Atomic force microscopy and nanoindentation of cement pastes with nanotube dispersions10.1002/pssa.200566166 ↗
26. Influence of carbon nanotubes structure on the mechanical behavior of cement composites10.1016/j.compscitech.2009.05.002 ↗
27. Microstructure and macroscopic properties of hybrid carbon nanofiber/silica fume cement composites10.1016/j.compscitech.2009.03.006 ↗
28. Highly dispersed carbon nanotube reinforced cement based materials10.1016/j.cemconres.2010.02.015 ↗
29. AC-impedance response of multi-walled carbon nanotube/cement composites10.1016/j.cemconcomp.2006.01.014 ↗
30. Electric polarization in carbon fiber-reinforced cement10.1016/S0008-8846(00)00382-3 ↗