01705862

Component

Adding Reclaimed asphalt pavement (RAP) materials into virgin binder substantially influences the mechanical and rheological properties of the asphalt blend, which may result in changes to pavement behavior. Various studies have investigated the effect of aging on the performance of asphalt pavements. However, the effect of adding RAP materials on asphalt binder characteristics, including saturate, aromatic, resin and asphaltene (SARA) content and the interaction between these components and high temperature rheological properties of binder is not fully explored. In this research 3 types of additives including softer binder (SB), rejuvenator agent (RB) and poly butadiene rubber (PMB) were used for modifying binder performance including different percentage of RAP contents. For studying chemical properties of asphalt samples, SARA separation test was conducted. Moreover, Dynamic Shear Rheometer (DSR) and Multiple Stress Creep Recovery (MSCR) tests were used to evaluate high temperature performance. The results show that the effect of RAP on rheological performance of binder blend is highly related to the distinctive characteristics of that RAP. Thus, the use of universal guidelines for RAP content that do not consider the specific properties of the exact materials in use have major limitations. The parameters obtained from DSR and MSCR test method correlate positively with the asphaltene content.

19-04673

English

6p

2019

Transportation Research Board 98th Annual Meeting

Digital/other

References

Asphalt mixtures; Binders; Mechanical properties; Reclaimed asphalt pavements; Rheological properties

Highways; Materials; Pavements

Transportation Research Board Annual Meeting 2019 Paper #19-04673

TRIS, TRB, ATRI

May 24 2019 8:43AM

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