The origin of nonlinear current-voltage behavior in fiber-reinforced cement composites

A. D. Hixson; L. Y. Woo; M. A. Campo; Thomas O Mason

doi:10.1016/S0008-8846(02)01062-1

The origin of nonlinear current-voltage behavior in fiber-reinforced cement composites

A. D. Hixson, L. Y. Woo, M. A. Campo, Thomas O Mason^*

^*Corresponding author for this work

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

Two distinct slopes (resistances) are obtained in current-voltage (I-V) plots of discontinuous, conductive fiber-reinforced cement composites. The low-field resistance correlates with the DC resistance (R_DC) of each composite. The high-field resistance correlates with the intermediate frequency cusp resistance (R_cusp) in Nyquist (-Z_imag vs. Z_real) plots obtained using impedance spectroscopy (IS). A model is developed that is based on passive oxide film formation on copper or steel fiber surfaces at low fields (I-V) or low frequencies (IS) due to the high pH pore solution of cement paste. With increase of field, leading to film breakdown (active or transpassive corrosion behavior), or increase of frequency, leading to short-circuiting of the passive layer, the fibers act as short-circuiting elements in the composite microstructure, resulting in a decrease in overall resistance.

Original language	English (US)
Pages (from-to)	835-840
Number of pages	6
Journal	Cement and Concrete Research
Volume	33
Issue number	6
DOIs	https://doi.org/10.1016/S0008-8846(02)01062-1
State	Published - Jun 1 2003

Keywords

Composite
Electrical properties
Electrochemical properties
Portland cement
Reinforcement

ASJC Scopus subject areas

Building and Construction
Materials Science(all)

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10.1016/S0008-8846(02)01062-1

Cite this

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title = "The origin of nonlinear current-voltage behavior in fiber-reinforced cement composites",

abstract = "Two distinct slopes (resistances) are obtained in current-voltage (I-V) plots of discontinuous, conductive fiber-reinforced cement composites. The low-field resistance correlates with the DC resistance (RDC) of each composite. The high-field resistance correlates with the intermediate frequency cusp resistance (Rcusp) in Nyquist (-Zimag vs. Zreal) plots obtained using impedance spectroscopy (IS). A model is developed that is based on passive oxide film formation on copper or steel fiber surfaces at low fields (I-V) or low frequencies (IS) due to the high pH pore solution of cement paste. With increase of field, leading to film breakdown (active or transpassive corrosion behavior), or increase of frequency, leading to short-circuiting of the passive layer, the fibers act as short-circuiting elements in the composite microstructure, resulting in a decrease in overall resistance.",

keywords = "Composite, Electrical properties, Electrochemical properties, Portland cement, Reinforcement",

author = "Hixson, {A. D.} and Woo, {L. Y.} and Campo, {M. A.} and Mason, {Thomas O}",

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T1 - The origin of nonlinear current-voltage behavior in fiber-reinforced cement composites

AU - Hixson, A. D.

AU - Woo, L. Y.

AU - Campo, M. A.

AU - Mason, Thomas O

PY - 2003/6/1

Y1 - 2003/6/1

N2 - Two distinct slopes (resistances) are obtained in current-voltage (I-V) plots of discontinuous, conductive fiber-reinforced cement composites. The low-field resistance correlates with the DC resistance (RDC) of each composite. The high-field resistance correlates with the intermediate frequency cusp resistance (Rcusp) in Nyquist (-Zimag vs. Zreal) plots obtained using impedance spectroscopy (IS). A model is developed that is based on passive oxide film formation on copper or steel fiber surfaces at low fields (I-V) or low frequencies (IS) due to the high pH pore solution of cement paste. With increase of field, leading to film breakdown (active or transpassive corrosion behavior), or increase of frequency, leading to short-circuiting of the passive layer, the fibers act as short-circuiting elements in the composite microstructure, resulting in a decrease in overall resistance.

AB - Two distinct slopes (resistances) are obtained in current-voltage (I-V) plots of discontinuous, conductive fiber-reinforced cement composites. The low-field resistance correlates with the DC resistance (RDC) of each composite. The high-field resistance correlates with the intermediate frequency cusp resistance (Rcusp) in Nyquist (-Zimag vs. Zreal) plots obtained using impedance spectroscopy (IS). A model is developed that is based on passive oxide film formation on copper or steel fiber surfaces at low fields (I-V) or low frequencies (IS) due to the high pH pore solution of cement paste. With increase of field, leading to film breakdown (active or transpassive corrosion behavior), or increase of frequency, leading to short-circuiting of the passive layer, the fibers act as short-circuiting elements in the composite microstructure, resulting in a decrease in overall resistance.

KW - Composite

KW - Electrical properties

KW - Electrochemical properties

KW - Portland cement

KW - Reinforcement

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SN - 0008-8846

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JO - Cement and Concrete Research

JF - Cement and Concrete Research

IS - 6

ER -

The origin of nonlinear current-voltage behavior in fiber-reinforced cement composites

Abstract

Keywords

ASJC Scopus subject areas

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