Molecular Interaction Mechanism between Aromatic Oil and High-Content Waste-Rubber-Modified Asphalt

High-content waste-rubber-modified asphalt (HRMA) has high viscosity and poor storage stability. HRMA not only improves the properties of road asphalt, but also reduces environmental pollution caused by waste tires. Enhancing molecular interaction rubber is key to making full use HRMA. In this paper, aromatic oil was used as activator for rubber. The mechanism between investigated. radial distribution function, diffusion coefficient, free volume, solubility parameter, shear were calculated through simulations. Storage stability, micromorphology, adhesive force measured via experiments. HRMA−1 (4.9 nN) lower than that RMA (6.2 HRMA−2 (5.8 nN). results show can promote dispersion rubber, systems stable. There exists a strong electrostatic asphaltenes an intermolecular or aromatics, which makes aromatics parcel molecules highly soluble in asphalt. Molecular simulations confirmed oil, shown reduce