Use of Polyurethane Precursor–Based Modifier as an Eco-Friendly Approach to Improve Performance of Asphalt

With the rapid growth of traffic demands, use liquid chemical material instead traditional modifier to prepare high-performance modified asphalt demonstrates dual values in environmental protection and performance improvement pavement. The objective this study is assess efficiency reveal modification mechanism using a developed polyurethane precursor–based reactive (PRM) preparation precursor–modified asphalt. selected petroleum asphalts (60/80 pen grade) were at 1.5%, 2.5%, 4% by weight. Samples base PMA binders characterized dynamic shear rheometer, time sweep fatigue test, single-edge notched beam tests. was finally demonstrated fraction analysis, Fourier transform infrared spectroscopy, differential scanning calorimeter, atomic force microscopy, fluorescence microscope. Owing presence polar groups neat asphalt, PRM can be treated as method for it shows good compatibility with incorporation matrix notably improve high-temperature resistance In addition, presents desirable low-temperature crack aging resistance. Considering relatively low level temperature (145°C) huge performance, regarded an environmentally friendly alternative production polymer-modified especially regions.