SBS/胶粉复合改性沥青制备工艺及路用性能研究

ccording to the research status and shortage of modified asphalt, taking the cnooc 70 # asphalt as the matrix asphalt ,SBS and rubber powder as modifier, adopting the dosage of 4%, 5% and 6% of SBS while 2%, 4%, 6% of rubber powder to prepare composite modified asphalt for contrast test, studied the preparation technology for SBS and rubber power composite modified asphalt, analyzed the trend of ductility, penetration, softening point and elastic recovery with different proportion of composite modified asphalt, and then analyzed the reason. The study show that in the circumstances of the SBS with a certain dosage, with the increase of the rubber powder, the ductility showed a decreasing trend while the softening point and elastic recovery showed a rising trend, the penetration decreasing first and then rising. The study results can provide important reference for the preparation technology and performance study of composite modified asphalt.