An improvement in electrical properties of asphalt concrete
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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.
Key wordsconductive asphalt concrete electrical properties resistivity electrically conductive model
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