Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/77296
Title: Piezoresistivity, mechanisms and model of cement-based materials with CNT/NCB composite fillers
Authors: Zhang, L
Ding, S 
Dong, S
Li, Z
Ouyang, J
Yu, X
Han, B
Keywords: Cement
CNT/NCB composite fillers
Mechanisms
Model
Piezoresistivity
Issue Date: 2017
Publisher: Institute of Physics Publishing
Source: Materials research express, 2017, v. 4, no. 12125704 How to cite?
Journal: Materials research express 
Abstract: The use of conductive cement-based materials as sensors has attracted intense interest over past decades. In this paper, carbon nanotube (CNT)/nano carbon black (NCB) composite fillers made by electrostatic self-assembly are used to fabricate conductive cement-based materials. Electrical and piezoresistive properties of the fabricated cement-based materials are investigated. Effect of filler content, load amplitudes and rate on piezoresistive property within elastic regime and piezoresistive behaviors during compressive loading to destruction are explored. Finally, a model describing piezoresistive property of cement-based materials with CNT/NCB composite fillers is established based on the effective conductive path and tunneling effect theory. The research results demonstrate that filler content and load amplitudes have obvious effect on piezoresistive property of the composites materials, while load rate has little influence on piezoresistive property. During compressive loading to destruction, the composites also show sensitive piezoresistive property. Therefore, the cement-based composites can be used to monitor the health state of structures during their whole life. The built model can well describe the piezoresistive property of the composites during compressive loading to destruction. The good match between the model and experiment data indicates that tunneling effect actually contributes to piezoresistive phenomenon.
URI: http://hdl.handle.net/10397/77296
ISSN: 2053-1591
DOI: 10.1088/2053-1591/aa9d1d
Appears in Collections:Journal/Magazine Article

Access
View full-text via PolyU eLinks SFX Query
Show full item record

SCOPUSTM   
Citations

5
Last Week
0
Last month
Citations as of Mar 29, 2019

WEB OF SCIENCETM
Citations

3
Last Week
0
Last month
Citations as of Apr 9, 2019

Page view(s)

35
Citations as of Apr 16, 2019

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.