Einsatz von Kohlenstoffnanoröhren im Straßenbeton zur Selbstüberwachung
Author(s): |
Zhi Ge
Dawei Wang Renjuan Sun Markus Oeser |
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Medium: | journal article |
Language(s): | German |
Published in: | Bautechnik, March 2015, n. 3, v. 92 |
Page(s): | 189-195 |
DOI: | 10.1002/bate.201400077 |
Abstract: |
Carbon nanotube-cement composite for self-sensing concrete pavementSelf-sensing materials could sense their own strain and damages without sensors. Smart concrete pavement made with cement based self-sensing materials could achieve in-situ monitoring for both structural integrity and traffic characteristics. This paper studied the electrical resistivity and piezoresistivity of cement with multiwall carbon nanotubes (MWCNTs) under cyclic loading. Effects of temperature and water content on both resistivity and piezoresistivity were investigated. Test results show that the resistivity decreased as the water content increased. Differently, the piezoresistivity and change in resistance first increased and then decreased. Temperature had significant effect on resistivity and piezoresistivity. As the temperature increased, resistivity decreased but the piezoresistivity increased. The major cause of the change in resistivity and piezoresistivity was the change of tunneling conduction under different conditions. The relationship between water content, temperature and the resistivity could be accurately represented with a regression function with an R2 of 0.92. Therefore, the data collected by self-sensing materials must be calibrated for the water content and temperature before interpretation. |
Keywords: |
water content temperature resistivity multiwall carbon nanotube piezoresistivity
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Available from: | Refer to publisher |
- About this
data sheet - Reference-ID
10071643 - Published on:
17/03/2015 - Last updated on:
19/03/2015