ESEM observation and rheological analysis of rejuvenated SBS modified bitumen

Observing the microstructure of bituminous binders with an environmental scanning electron microscope (ESEM) can contribute significantly to reveal underlying rejuvenation mechanism. In this study, three rejuvenators were selected regenerate aged SBS modified at five dosages, and their rheology was evaluated using a dynamic shear rheometer. ESEM employed examine as well, series parameters quantified image analysis. The results demonstrated that chemical composition changes correspond evolution morphological rheological properties. Moreover, characteristics analyzed Principal Component Analysis (PCA) regression Based on PCA results, rejuvenated has shown good correlation stiffness after combining various principal components. According analysis, distance between adjacent fibrils exhibited significant Jnr3.2 complex modulus index. Overall, study strengthen hypothesis is intimately correlated properties, rather than irrelevant surface phenomena. Bitumen, polymer bitumen, rejuvenator, microstructure, rheology, microscopy.