Akademik Veri Yönetim Sistemi
5th Eurasphalt Eurobitume Congress 2012, İstanbul, Türkiye, 13 - 15 Haziran 2012
In contrast to conventional binder grading system relying basically on needle penetration and viscosity, performance grading system can be used for classification of both neat and modified binders and constitute one of the most prominent focus area for Bituminous Binders Technical Committee CEN/TC 336. In this study, the four different penetration grade bitumen samples from the all four crude oil refineries of Turkey, one is of distinctly higher asphaltene content, were modified with SBS, Elvaloy, SBR and Lucobit modifiers. Both unmodified and polymer modified bitumens were subjected to conventional and SHRP binder performance tests, namely penetration, softening point, force ductility, rotational viscometer (RV), rolling thin film oven (RTFO), dynamic shear rheometer (DSR) and bending beam rheometer (BBR). Additionally, SARA (saturates, aromatics, resins and asphaltenes) contents of neat bitumens by thin layer chromatography and polymer dispersion of modified binders by fluorescent microscopy as per EN 13632 were determined to correlate with performance grades. The results showed the base bitumens of the high aphaltene content refinery and its modified bitumens have generally one grade better performance grade than the others, which was verified by polymer dispersion tests. This paper presents all the details of the test results and evaluations.
Keywords: Dynamic Shear Rheometer, Bending Beam Rheometer, Polimer Modifed Bitumen, SARA Content, Polimer Dispersion, Fluorescent Microscopy