The asphalt modified with different printed circuit boards(PCBs) content(0, 5%, 10%, and 15%) was prepared in this study. The general properties, rheological properties, temperature sensitivity, fatigue resistance, and morphology of the PCBs modified asphalt were investigated by conventional tests, the Brookfield viscometry tests, the dynamic shear rheometer(DSR) tests, the bending beam rheometer(BBR) tests, and the fluorescence microscopy tests. And the influence of PCBs content on the above-mentioned properties was analyzed systematically. The results showed that the addition of PCBs could improve the high temperature performance, the low temperature performance, and the temperature sensitivity property of the modified asphalt, while compromising with the fatigue resistance of the modified asphalt. With the increase of PCBs content, the modified asphalt could have better softening points, viscosity, failure temperature, and temperature sensitivity, while its low temperature performance and fatigue resistance became worse to different degree. And the particle size of PCBs became bigger and non-uniform with an increasing PCBs content. According to the above-mentioned properties, the optimum PCBs content was specified at less than 10% in the modified asphalt system.
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