Reducing road asphalt pollution: Preparation and properties of novel emission reduction agent

To further improve the emission reduction effect on asphalt smoke and mitigate environmental pollution, a novel emission reduction agent (TBD) combined with physical adsorption and chemical degradation was synthesized with tourmaline, biochar, and diatomite. The testing and evaluation method for the emission reduction efficacy of TBD has been established. The optimal preparation method and parameter of TBD were selected based on macroscopic performance and microscopic analysis. The results indicated that TBD had the highest emission reduction rate and most stable storage under the ball milling process. According to XRD, FTIR, SEM, and BET, TBD with the multistage porous structure and spontaneous polarization effect was synthesized by the ball milling parameter of 200r-2 h. The emission reduction efficiency of TBD on the asphalt smoke effect was enhanced by a synergistic interaction of the physical adsorption and chemical degradation. The emission reduction rate was up to 65.84% for 3 h. This laid the foundation for the development and promotion of low-pollution asphalt.