Chemical Composition and Rheological Characteristics of Binders Containing RAP and Rejuvenator

AbstractOne of the most important concerns in using different additives for improving fatigue and low-temperature cracking resistance is the diminishing rutting resistance of pavement. In this research, saturates, aromatics, resins, and asphaltenes (SARA)-separation, dynamic shear rheometer (DSR), m...

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Bibliographic Details
Published in:Journal of materials in civil engineering 2020-04, Vol.32 (4)
Main Authors: Mansourkhaki, Ali, Ameri, Mahmoud, Habibpour, Mahdi, Shane Underwood, B
Format: Article
Language:English
Subjects:
Additives
Asphalt pavements
Asphaltenes
Building materials
Chemical composition
Civil engineering
Crack propagation
Creep recovery
Fatigue cracking
Fatigue failure
Fracture mechanics
Low temperature
Low temperature resistance
Organic chemistry
Parameters
Rheological properties
Rheology
Technical Papers
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Summary:AbstractOne of the most important concerns in using different additives for improving fatigue and low-temperature cracking resistance is the diminishing rutting resistance of pavement. In this research, saturates, aromatics, resins, and asphaltenes (SARA)-separation, dynamic shear rheometer (DSR), multiple stress creep recovery (MSCR), and bending beam rheometer (BBR) tests were conducted to study the interaction between chemical components and rheological behavior of binders with 25, 50, and 100 percentages of reclaimed asphalt pavement (RAP) binder modified with a softer binder and rejuvenator. The results show that the use of general guidelines for RAP content that do not consider the specific properties of all component materials in use has major limitations. The parameters obtained from rheological tests correlate positively with the asphaltene content. Using just asphaltene content as an index is more reliable than using Gastel and Asphaltene indices for investigating the effect of aging or adding an aged binder because its correlation with MSCR parameters is stronger. In this research, it also discovered that 100% of RAP content could be replaced in the case of an oil rejuvenator addition.
ISSN:0899-1561
1943-5533
DOI:10.1061/(ASCE)MT.1943-5533.0003016