چکیده مقاله
This study investigates the correlation between the melt flow index MFI of plastics and the rheological properties of plastic modified asphalt binders PMAB To this end, virgin and waste low density polyethylene LDPE plastics, with different MFI values, were used to prepare modified asphalt binders Common asphalt binder tests including softening point, ductility, and rotational viscosity were conducted alongside the performance grading PG tests at high, intermediate, and low temperatures Experimental results showed that plastics with lower MFI considerably increased the asphalt binder stiffness and rutting resistance but reduced workability and flexibility, particularly at low temperatures Conversely, higher MFI plastics enhanced blend uniformity and fatigue resistance at intermediate temperatures, though reduced stiffness at high temperatures Correlation analysis between MFI and asphalt binder properties highlighted strong relationships, especially at intermediate and low temperatures, confirming MFI as a key factor in plastic modified asphalt binder performance In addition, the results showed LDPEs with very low MFI values less than 0 75 g/10 min do not properly disperse in the asphalt binder, leading to poor storage stability These findings emphasize the critical role of MFI for enhancing the workability and performance of PMABS
کلیدواژهها
نویسندگان
Saeed Amani
Ph D Candidate, Department of Civil Engineering, Sharif University of Technology, Tehran, Iran
Alireza Harivandi
Graduate Research Assistant, Department of Civil Engineering, Sharif University of Technology, Tehran, Iran
Nader Tabatabaee
Professor, Department of Civil Engineering, Sharif University of Technology, Tehran, Iran
شیوه ارجاع
Amani, Saeed and Harivandi, Alireza and Tabatabaee, Nader,1404,Correlation Analysis Between Rheological Properties of Plastic-Modified Asphalt Binders and Melt Flow Index,14th International Congress on Civil Engineering,Tehran
ارائهشده در
مجموعه مقالات چهاردهمین کنگره بین المللی مهندسی عمران29 مهر 1404 · تهران