Effect of Short-Term and UV Irradiation Aging on the Behaviour of SBS-Modified Bitumen

To obtain road bitumen with improved temperature and fatigue resistance, polymers and/or rubbers could be added to it. A particularly suitable polymer for modification is styrene-butadiene-styrene (SBS) copolymer but limited information available about the ageing behaviour of modified binders. In this work, two neat bitumens, different penetration grades, SBS-modified containing SBS amounts, were selected, their short-term UVB investigated considering dynamic shear rheometry Attenuated Total Reflectance-Fourier Transformation InfraRed spectroscopy (ATR-FTIR). Short-time was performing rolling thin film oven test (RTFOT), while artificial UV examined/investigated using lamps. The structural changes in monitored at exposure times. All results suggest that having higher grade more stable than one a lower RTFOT condition, addition exerts beneficial effect on thermal stability during processing. Further, also has resistance bitumen, reducing its oxidation tendency.