TY - JOUR
T1 - Effect of recycling agents in recycled asphalt binders observed with microstructural and rheological tests
AU - Menapace, Ilaria
AU - Garcia Cucalon, Lorena
AU - Kaseer, Fawaz
AU - Arámbula-Mercado, Edith
AU - Epps Martin, Amy
AU - Masad, Eyad
AU - King, Gayle
N1 - Publisher Copyright:
© 2017
PY - 2018/1/15
Y1 - 2018/1/15
N2 - In this study, the effect of recycling agents on recycled blends obtained from base and recycled asphalt binders and the performance of the rejuvenated binders with aging was investigated by means of Atomic Force Microscopy (AFM) and Dynamic Shear Rheometer (DSR). This study arises as the amount of recycled materials in asphalt pavements continues to increase. Recycled binders are significantly stiffer than base binders; however, the performance grade can be restored by inclusion of recycling agents. Nevertheless, intermediate temperature cracking performance evaluated by the Glover-Rowe (G-R) parameter indicated that the effect of the recycling agents is not sustained with subsequent aging, which could jeopardize its effectiveness in service. The AFM images provided microstructural information, which offer indications about changes in molecular mobility and degree of association with aging, presence of agglomerations, and the dispersive effect of recycling agents.
AB - In this study, the effect of recycling agents on recycled blends obtained from base and recycled asphalt binders and the performance of the rejuvenated binders with aging was investigated by means of Atomic Force Microscopy (AFM) and Dynamic Shear Rheometer (DSR). This study arises as the amount of recycled materials in asphalt pavements continues to increase. Recycled binders are significantly stiffer than base binders; however, the performance grade can be restored by inclusion of recycling agents. Nevertheless, intermediate temperature cracking performance evaluated by the Glover-Rowe (G-R) parameter indicated that the effect of the recycling agents is not sustained with subsequent aging, which could jeopardize its effectiveness in service. The AFM images provided microstructural information, which offer indications about changes in molecular mobility and degree of association with aging, presence of agglomerations, and the dispersive effect of recycling agents.
KW - Atomic Force Microscopy
KW - Glover-Rowe parameter
KW - Microstructure
KW - Reclaimed asphalt pavement
KW - Recycled asphalt shingle
KW - Recycling agent
KW - Rejuvenator
KW - Rheology
UR - https://www.scopus.com/pages/publications/85030748727
U2 - 10.1016/j.conbuildmat.2017.10.017
DO - 10.1016/j.conbuildmat.2017.10.017
M3 - Article
AN - SCOPUS:85030748727
SN - 0950-0618
VL - 158
SP - 61
EP - 74
JO - Construction and Building Materials
JF - Construction and Building Materials
ER -