ABSTRACT
While virgin and aged binders are blended together, the old molecular associations of binders may be broken and new ones rebuilt due to intermolecular interactions. In this study, the intermolecular interactions between virgin and aged binders were investigated using Gel Permeation Chromatography (GPC). Results indicate that intermolecular interactions occurred between virgin and aged binders when virgin and aged binders were blended together in solvent. The factors affecting the degree of interaction included difference in chemical composition between the two binders, aged binder content, and molecular size. The degree of intermolecular interaction increased with the increase in the difference in chemical structure between virgin and aged binders. The intermolecular interactions were more likely to happen between large molecules than other molecules. For large and medium molecules, it is found that there was a good liner relationship between the degree of their intermolecular interaction and the aged binder content.
