Study On The Performance Of Domestic Waste Plastics CRP Modified Asphalt

On the basis of understanding the current situation and development tendency of plastic modified bitumen at home and abroad, considering various evaluation indexes and experimental methods about polymer modified asphalt and its mixtures, the paper combines conventional tests to make a contrast test research and analysis on technical performance for different dosage CRP and SBS modified asphalt with the same matrix asphalt. By needle penetration、softening point、low-temperature ductility test to research high and cryogenic temperature performance on the CRP modified asphalt; through rotary viscosity test to explore the change of viscosity properties on CRP modified asphalt. In view of the different types of modified asphalt, using the same aggregate and aggregate gradation, two types of asphalt mixture——AC-13 and SMA-13, by Marshall stability test、rutting test、low-temperature bending test、adhesion test、 freeze-thaw splitting test、indirect tensile test to evaluate the high-temperature rutting resistance、low temperature crack resistance、 resistance to water damage and fatigue resistance ability of CRP asphalt mixture. The results showed that the dosage of 5% CRP waste plastic modified asphalt has almost the same performance with 4% content of SBS modified asphalt, the addition of CRP modifier can significantly improve the high temperature performance of asphalt mixtures, but did not improve low temperature performance; CRP modified asphalt mixture has significantly high temperature rutting resistance, water damage resistance and fatigue resistance have been obviously improved.