Design and performance of super SBS/rubber powder composite modified asphalt
In the SBS modified asphalt mixed with a certain amount of rubber powder to form a high-quality composite modified asphalt.To better understand the performance and modiffication mechanism of this modified asphalt,as well as the optimal dosages of SBS and rubber powder,a series of tests were conducted based on the Superpave asphalt binder test.These tests included Brookfield rotational viscosity,DSR,and BBR tests with varying amounts of rubber powder and SBS content,concluded that rubber powder improves the shear and high-temperature performance of SBS modified asphalt,with a less noticeable improvement in low-temperature performance.The optimal dosages for different composite modified asphalts were preliminarily determined.Fluorescence microscope tests and SEM tests further validated the modification effects of rubber powder and SBS on asphalt.Ultimately,the study shows that adding a certain amount of rubber powder to SBS modified asphalt can enhance its performance,resulting in a composite modified asphalt formula superior to conventional SBS modified asphalt and rubber asphalt.
high polymer curing rubber powdercomposite modified asphaltmodification mechanismSuperpave method
NETL
NSTL
万方数据
