A type of recycling agent was developed and its use for modifying used asphalt is described.The results show that the viscosity and three main properties of the
The fabrication of Fe<sub>2</sub>O<sub>3</sub>—MnO<sub>2</sub>—Co<sub>2</sub>O<sub>3</sub>—CuO system ceramics, and the com posite system ceramics of transit