Investigation the CF Based Conductive Asphalt Mixtures for Anti-icing

In recent years, researchers have been working on a new type of pavement called electrically conductive asphalt to be anti-icing. In this study, hot mix asphalt (HMA) stone mastic asphalt (SMA) specimens were prepared by adding carbon fiber (CF) in three different lengths (5-10-15 mm) and five different percent (0.1-0.2-0.3-0.4 and 0.5% by weight). Volume resistivity measurement and temperature changes of the specimens under constant voltage (20 V) were determined for each of the specimens. As a result of the study, it was determined that the CF properties and aggregate gradation difference were quite effective on the electrical conductivity, and the electrical conductivity properties also changed depending on the CF length and percentage in the mixtures. According to the electrical conductivity test results, it was concluded that 5 mm long CF specimens were more suitable for use in electrically conductive asphalt concretes (CAC), one of the lowest volumetric resistivity values in the literature was obtained. In addition, it was concluded that aggregate gradation is also effective on electrical conductivity.