An improvement in electrical properties of asphalt concrete

Abstract

Materials such as Koch AH—70, basalt aggregate, limestone powder and graphite particles were used to prepare conductive asphalt concrete, which is a new type of multifunctional concrete. The mix proportion by weight was shown as follows. Fine aggregates (2.36–4.75 mm): fine aggregates (<2.36mm): lime-stone powder: asphalt=120∶240∶14∶30. The content of added graphite particles ranged from 0% to 20% (by the weight of asphalt concrete). A conductive asphalt concrete with a resistivity around 10–10³Ω·m was obtained. Special attention was paid to the effects of graphite content, graphite physical-chemical properties, asphalt content and temperature on the resistivity. Furthermore, an attempt was made to develop an electrically conductive model for asphalt concrete.

Keywords

conductive asphalt concrete / electrical properties / resistivity / electrically conductive model

References

[1] Tumi P J. Electrical Conductivity of Portland-cement Mortars. Cement and Concrete Research, 1996, 26(4): 529-534.

[2] Banthia N. Electrical Resistivity of Carbon and Steel Micro-fiber Reinforced Cement. Cement and Concrete Research, 1992, 22(5): 804-814.

[3] Abo S A. Electrical Conductivity of Concrete Containing Silica Fume. Cement and Concrete Research, 1995, 25(6): 1615-1625.

[4] Wen S, Chung D D L. Carbon Fiber-reinforced Cement as a Thermistor. Cement and Concrete Research, 1999, 29(6): 961-965.

[5] Chung D D L. Electrical Conduction Behavior of Cement-matrix Composites. Journal of Materials and Performance, 2002, 11(2): 194-204.

[6] Wen S, Chung D D L. Seebeck Effect in Carbon Fiber Reinforced Cement. Cement and Concrete Research, 1998, 23(4): 837-841.

[7] Ying Wan. Electric Properties of Carbon Black-Butadiene Nitrite Rubber Composites. Polymer Materials Science & Engineering, 1999, 15(5): 25-30.

[8] Kezheng Zhen. Properties of Silicone Rubber Composite Filled With High-structured Conductive Carbon Black. Synthesize Rubber, 2000, 23(6): 366-369.

[9] Chuangcheng Lu. Study on Conductive Plastics Filled by Carbon-black. Plastics, 2000, 29(1): 32-34.

[10] Mu Yao. The Study on the Electrical Conductivity Model of the Composite Conductive Fiber. Northwest Institute of Textile Sci. and Tech., 2001, 15(2): 231-215.

[11] Zhaolong Xuan. Research on PTC Effect in Carbon/polymer Conducting Composites. Plastics, 1999, 19(10): 25-30.

[12] Zhonghe Shui. Study on The Electrical Properties of Carbon Fiber-cement Composite (CFCC). Journal of Wuhan University of Technology—Materials Science Edition, 1995, 10(4): 38-41.