Research on Road Performance of Asphalt Mixture with Iron Waste Ore

To investigate the road performance of asphalt mixtures incorporating different types of iron waste ore, aggregates derived from stripping waste rock rich in iron trioxide (Fe₂O₃) and iron oxide (FeO) were utilized. Experimental comparisons revealed that the asphalt concrete mixture containing iron trioxide mining and stripping waste rock exhibited the highest dynamic stability, indicating superior high-temperature stability. The mixture with waste rock rich in iron trioxide ranked second in terms of performance. Additionally, the residual stability of asphalt concrete mixed with mining and stripping waste rock showed a significant improvement, with the mixture containing iron trioxide-rich waste rock achieving a residual stability of up to 94.96%. Furthermore, asphalt mixtures incorporating stripping waste rock demonstrated enhanced anti-skid properties compared to conventional mixtures, with the iron trioxide-rich aggregate mixture performing the best. Measurements of texture depth indicated that these mixtures also offered improved drainage and noise reduction capabilities. In summary, replacing traditional mining gravel with mining and stripping waste rock not only provides economic benefits but also addresses the environmental issue of waste rock accumulation.