Fuente: Journal of applied polymer Lugar: RESEARCH ARTICLE Preparation process of the novel UV-curable resin modified asphalt. First, UV-curable resin is prepared by mixing raw materials (EA, TPGDA, TPO, DMEA) followed by stirring and degassing; then the resin is blended with molten special asphalt via high-speed shearing; finally, the mixture is cured under UV irradiation to obtain the UV-curable resin modified asphalt.

ABSTRACT
In this paper, UV-curable resins based on photopolymerization reactions were utilized for asphalt modification, resulting in the development of a novel polymer-modified asphalt. The curing mechanism of the resin was revealed through the tests of curing kinetics and crosslink density. The microstructures, physical properties, and rheological properties of the UV-curable resin modified asphalt were characterized by methods such as Fourier transform infrared spectroscopy (FT-IR), fluorescence microscopy (FM), conventional asphalt physical property tests, dynamic shear rheometry (DSR), and bending beam rheometry (BBR). Research results indicate that the UV-curable resin rapidly constructs a three-dimensional crosslinked network through photoinitiated synergistic oxygen removal and free radical polymerization. The resin forms a uniformly dispersed phase within the asphalt, and the two phases exhibit favorable thermodynamic compatibility. When the content of UV-curable resin is 20%, the modified asphalt shows excellent physical properties in terms of penetration, softening point, ductility, and viscosity. The incorporation of UV-curable resin can effectively improve the high-temperature rutting resistance and deformation recovery ability of asphalt, while meeting the low-temperature service requirements. The UV-curable resin modified asphalt developed in this study can open up new channels for repairing diseases of asphalt pavements in areas with UV radiation in subsequent studies.