A Laboratory Study of the Effect of ZnO Nanooxide and CuO Nanooxide on the Rutting Resistance and Absorption of Pollutants in Porous Asphalt in Urban Surface Runoff

The use of porous asphalt has been the subject of many inventions and innovations during the last decade. The most obvious characteristics of this asphalt is its drainage ability, which is due to the presence of a high percentage of empty space and pores and connections between these pores. Therefore, it is very important to pay attention to environmental issues such as the reduction of pollutants in porous environments such as asphalt, and therefore the purpose of the research is to investigate the effect of different concentrations of nanomaterials such as nano copper oxide (CuO) and nano zinc oxide (ZnO) on resistance and absorption. The pollutant was in porous asphalt. In this study, durable porous asphalt pavement with the ability to absorb pollutants from water was introduced, and it was built for dynamic creep testing in the asphalt laboratory, and the state of pollutants was investigated in the chemical laboratory. The results of the dynamic creep test showed that the addition of CuO nano oxide to the porous asphalt mixtures significantly increased the bearing capacity and Mental Number (FN), which was useful for rutting resistance. The FN values ​​of porous asphalt mixtures increased by an average of 15% in all loads, and in all loads, asphalt samples modified with 6% copper nano oxide had higher FN values, but insignificant changes were observed in asphalt samples containing ZnO nano oxide. Also, the comparison of the qualitative results regarding the effectiveness of zinc oxide and copper nanomaterials in reducing pollution showed that zinc oxide (ZnO) had the role of reducing pollution in all qualitative parameters, and the biggest reduction was in phosphate, TSS and sulfate. Finally, in the mechanical test section, the asphalt sample containing copper nanooxide with a concentration of 6%, and in the environmental section, the asphalt sample containing zinc nanooxide with a concentration of 8% had the best performance.