The electrical properties and snow melting of graphite slurry infiltrated steel fiber concrete

Abstract

The conductivity property of graphite slurry infiltrated steel fiber concrete (GSIFCON) was investigated by the four-probe method. The experimental results show that the electrical resistivity of GSIFCON decreases significantly at a specific concentration of graphite, i e, the percolation concentration. A model was accordingly developed to explain its conductive mechanism, where graphite particles could be served as bridge for conductive network between unconnected fiber chains. For an application, snow melting test of GSIFCON was carried out and a simple heating power analysis was performed. The results reveal that the thermal energy produced by GSIFCON makes snow melting effectively and the electrothermal efficiency can reach approximately 20%.

Keywords

GSIFCON / graphite / electrical resistivity / snow melting test

References

[1] Hong Lei. Preparing Method of the Graphite Slurry Steel Fiber Conducting Composite[P]. CN ZL200510200757.6, 2008 (in Chinese)

[2] Hong L., Sun W., Huang Y. Experimental Study on the Characteristics of GSIFCON and Its Capacity for Supervising the Damages of the Reinforced Concrete Beams[J]. China Civil Engineering Journal, 2008, 41(7): 7-13.

[3] Yehia S., Tuan C. Y., Ferdon D., chen B. Conductive Concrete Overlay for Bridge Deck Deicing: Mixture Propertioning, Optimization, and Properties[J]. ACI Materials Journal, 2000, 97(2): 172-180.

[4] Yang Q., Zhu B. Effect of Steel Fiber on the Deicer-scaling Resistance of Concrete[J]. Cement and Concrete Research, 2005, 35(12): 2360-2363.

[5] Hong L. Study on the Mechanism of the Electrical Conductivity of Infiltrated Steel Fiber Concrete[J]. Journal of Shan Dong Jian Zhu University, 2006, 21(4): 295-300.

[6] Hong L. Concrete Properties and New Type Concrete Technology[ M], 2005 Dalian Dalian University of Technology Press 191-198.

[7] Hong L., Sun W. Study on the Conductive Properties and Alert Performance of GSIFCON[J]. Concrete, 2006, 205(11): 16-19.

[8] Hong L., Song Y. Study on Conductive Properties of Graphite Slurry Infiltrated Fiber Concrete[J]. Journal of Building Materials, 2006, 9(6): 649-653.

[9] Shen g., Dong F. Study on Graphite Electrically Conductive Concrete[J]. Concrete, 2004, 172(2): 21-24.

[10] McLachlan D. S., Blaszkiewicz M., Newnham R. E. Electrical Resistivity of Composites[J]. Journal of the American Ceramics Society, 1990, 73(8): 2187-2203.

[11] Xie P., Gu P., Beandoin J. J. E1ectrical Percolation Phenomena in Cement Composites Containing Conductive Fibers[J]. Journal of Materials Science, 1996, 31(15): 4093-4097.

[12] Li P. Preliminary Evaluation Seasonal Snow Resources in China[J]. ACTA Geographical SINICA, 1998, 43(2): 108-119.