Investigating the Effect of Characteristics of Aggregates and SFE components of Asphalt Binder-Aggregate on the Moisture Sensitivity of Asphalt Mixtures Modified with Anti-Stripping Agents

Moisture can damage the rheological properties of bitumen and adhesion of bitumen to aggregates in asphalt mixtures. Many studies have shown that the use of anti-stripping additives can be used as one of the effective methods for improving the quality and enhancing the resistance of asphalt mixtures against moisture damage. Accordingly, in this research, an attempt has been made to investigate the mechanism of the effect of nano-amine anti-nailing materials on the basis of mechanical and thermodynamic methods. 24 different mixes of asphaltic mixes have been investigated using three types of aggregates, two types of base bitumen and three types of anti-scaling additives. The surface free energy components of bitumen were measured using the droplet method and the global absorption coefficient and the ratio of fatigue life of the asphaltic mixtures through indirect traction testing, respectively. The structural properties of aggregates were also investigated using a SEM scanning electron microscope (SEM). The results of this study show that the use of nanomaterials adds to the increase of hydrophobicity and the reduction of hydrophilicity in aggregates. Also, the use of this type of additives will increase the ratio of fatigue life and tensile strength in asphalt mixtures. In addition, nanomaterial additives on bituminous surface free energy components, aggregate surface free energy components, adhesion energy Bituminous aggregate and affinity energy in asphalt mixtures Beth leaves and improves the function of these components is against moisture damage.