Influence of water content on conductivity and piezoresistivity of cement-based material with both carbon fiber and carbon black

Abstract

The influence of water content on the conductivity and piezoresistivity of cement-based material with carbon fiber (CF) and carbon black (CB) was investigated. The piezoresistivity of cement-based material with both CF and CB was compared with that of cement-based material with CF only, and the changes in electrical resistivity of cement-based material with both CF and CB under static and loading conditions in different drying and soaking time were studied. It is found that the piezoresistivity of cement-based material with both CF and CB has better repeatability and linearity than that of cement-based material with CF only. The conductivity and the sensitivity of piezoresistive cement-based material with both CF and CB are enhanced as the water content in piezoresistive cement-based material increases.

Keywords

cement-based material / carbon fiber / carbon black / water content / conductivity / piezoresistivity

References

[1] Aitcin P. C. Cements of Yesterday and Today Concrete of Tomorrow[J]. Cem. Concr. Res., 2000, 30: 1 349-1 359.

[2] Chung D. D. L. Self-monitoring Structural Materials[J]. Mater. Sci. Eng., 1998, 22: 57-78.

[3] Hammond E., Robson T. D. Comparison of Electrical Properties of Various Cements and Concretes[J]. Eng., 1995, 166: 114-115.

[4] T C Hou, J P Lynch. Conductivity-based Strain Monitoring and Damage Characterization of Fiber Reinforced Cementitious Structural Components[C]. Proc of SPIE-Smart Structures and Materials 2005-Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, San Diego, 2005

[5] Hou Z. F., Li Z. Q., Wang J. J. Influence of Aggregates on Properties of Carbon Fiber Electrically Conductive Concrete for Deicing or Snow Melting[J]. J. Wuhan University of Technology-Transport. Sci. Eng. Ed., 2005, 29(5): 704-706.

[6] Mao Q. Z., Chen P. H., Zhao B. Y., . A Study on the Compression Sensibility and Mechanical Model of Carbon Fiber Reinforced Cement Smart Material [J]. Acta Mat. Compos. Sin., 1997, 10: 338-344.

[7] Han B. G., Yu X., Kwon E. A Self-sensing Carbon Nanotube/Cement Composite for Traffic Monitoring[J]. Nanotechnology, 2009, 20: 445501

[8] Han B. G., Ou J. P. Embedded Piezoresistive Cement-based Stress/Strain Sensor[J]. Sensor. Actuat. A-Phys., 2007, 138: 294-298.

[9] H G Xiao, H Li. Strain Sensing Property of Carbon Black Filled Cement-based Composites[C]. Proc 2th International Conference on Structural Health Monitoring of Intelligent Infrastructure, Shenzheng, 2005

[10] Chen B., Wu K. R., Yao W. Piezoresistivity in Carbon Fiber Reinforced Cement Based Composites[J]. J. Mater. Sci. Technol., 2004, 20(6): 746-750.

[11] Li H., Xiao H. G., Ou J. P. Effect of Compressive Strain on Electrical Resistivity of Carbon Black-filled Cement-based Composites[J]. Cem. Concr. Compos., 2006, 28: 824-828.

[12] Wen S. H., Chung D. D. L. Carbon Fiber-reinforced Cement as a Strain-sensing Coating[J]. Cem. Concr. Res., 2001, 31: 665-667.

[13] Zheng L. X., Li Z. Q., Song X. H. Corrosion Monitoring of Rebar by Compression Sensitivity of CFRC[J]. J. Exp. Mech., 2004, 19(2): 206-210.

[14] Shi Z. Q., Chung D. D. L. Carbon Fiber-reinforced Concrete for Traffic Monitoring and Weighing in Motion[J]. Cem. Concr. Res., 1999, 29: 435-439.

[15] B G Han, J P Ou. Smart Cement Paste Standard Stress/Strain Sensors and Self-sensory Concrete Members[C]. Proc 2th International Conference on Structural Health Monitoring of Intelligent Infrastructure, Shenzheng, 2005

[16] Han B. G., Guan X. C., Ou J. P. Electrode Design, Measuring Method and Data Acquisition System of Carbon Fiber Cement Paste Piezoresistive Sensors [J]. Sensor. Actuat. A-Phys., 2007, 135: 360-369.

[17] Mao Q. Z., Zhao B. Y., Shen D. R., . Study on the Compression Sensibility of Cement Matrix Carbon Fiber Composite[ J]. Acta Mat. Compos. Sin., 1996, 13(4): 8-11.

[18] Chen B., Wu K. R., Yao W. Conductivity of Carbon Fiber Reinforced Cement-based Composites[J]. Cem. Concr. Compos., 2004, 26: 291-297.

[19] Balta C. F. J., Bayer R. K., Ezquerra T. A. Electrical Conductivity of Polyethylene-carbon-fiber Composites Mixed with Carbon Black[J]. J. Mater. Sci., 1998, 23(4): 1 411-1 415.

[20] Pramanik P. K., Khastgir D., De S. K., . Pressure-sensitive Electrically Conductive Nitrile Rubber Composites Filled with Particulate Carbon Black and Short Carbon Fiber [J]. J. Mater. Sci., 1990, 25(9): 3 848-3 853.

[21] Sun M. Q., Li Z. Q., Liu Q. P. The Electromechanical Effect of Carbon Fiber Reinforced Cement[J]. Carbon, 2000, 40: 2 263-2 284.

[22] X C Guan, B G Han, M H Tang, et al. Temperature and Humidity Variation of Specific Resistance of Carbon Fiber Reinforced Cement[C]. Proc of SPIE -Smart Structures and Materials 2005- Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, San Diego, 2005

[23] Wang Y. L., Zhao X. H. Positive and Negative Pressure Sensitivities of Carbon Fiber-reinforced Cement-matrix Composites and Their Mechanism[J]. Acta Mat. Compos. Sin., 2005, 22(4): 40-46.

[24] Zhang Z. G. Functional Composite Materials [M], 2004 Beijing Chemical Industry Press 1-50.