Laboratory evaluation of asphalt binder modified by waste carbon particles (WCP) reclaimed from printers

Abstract

For the large amount of waste carbon particles (WCP) produced by the printers, it has caused terrible pollutions to the Eco environment. It is important to innovate a new application area to deal with the WCP. The surface topography and size distribution of WCP were characterized by scanning electron microscope (SEM) and laser particle size analyzer respectively. It was used as an additive for asphalt, extensive experiments were conducted to determine the preparation parameters and evaluate the performance of WCP modified asphalt. The preparation parameters of WCP modified a sphalt were determined by a L9(33) orthogonal test. Basing on the physical performance of asphalt the optimum shearing temperature, shearing time and shearing rate of WCP modified asphalt are 155°C, 45 min, and 4000 r/min respectively. The viscosities results show that the mixing and compaction temperature of 12% WCP modified asphalt mixture are 5 °C and 9°C higher than that of asphalt mixture. The PG high- and low-temperature grades and fatigue factor of asphalt increase with increasing WCP content. 10% WCP is recommended as the optimum dosage to modify the asphalt, and it can obviously improve the high temperature stability of asphalt.