TY - JOUR
T1 - Rheological behavior of bio-asphalts and effect of rejuvenators
AU - Barzegari, Saman
AU - Solaimanian, Mansour
N1 - Funding Information:
The bio-oils used in this study has been provided by USDA Agricultural Research Services (USDA-ARS) and National Renewable Energy Laboratory (NREL). The authors would like to thank their generous contribution toward this research. The experimental parts of this study was conducted in Northeastern Center of Excellence for Pavement Technology (NECEPT) Laboratory at The Pennsylvania State University. The authors would like to especially thank Mr. Scott Milander at the NECEPT laboratory for his constant help and support.
Publisher Copyright:
© 2020
PY - 2020/8/10
Y1 - 2020/8/10
N2 - Bio-binders are considered as a sustainable alternative to the current asphalt binders. Various biomass resources have been investigated to produce dependable bio-binders by different researchers. While bio-binders and their blends with asphalt binders show promising high-temperature properties, their properties deteriorate rapidly with progress in aging, raising valid concerns about their cold-temperature performance. Most studies address this problem by minimizing the bio-binder content. This study was conducted to evaluate rheological behavior of bio-asphalts with high bio-binder content, and to validate a recently proposed method for improving long-term performance properties of bio-asphalts by inclusion of small quantities of rejuvenator. Samples of different bio-asphalts with 35% replacement ratio were prepared, and were consequently modified by small rejuvenator content. Results showed that the proposed method can successfully alleviate most concerns about the long-term properties of bio-asphalts. However, it was found that all bio-asphalts have lower resistance against fatigue and non-load related cracking.
AB - Bio-binders are considered as a sustainable alternative to the current asphalt binders. Various biomass resources have been investigated to produce dependable bio-binders by different researchers. While bio-binders and their blends with asphalt binders show promising high-temperature properties, their properties deteriorate rapidly with progress in aging, raising valid concerns about their cold-temperature performance. Most studies address this problem by minimizing the bio-binder content. This study was conducted to evaluate rheological behavior of bio-asphalts with high bio-binder content, and to validate a recently proposed method for improving long-term performance properties of bio-asphalts by inclusion of small quantities of rejuvenator. Samples of different bio-asphalts with 35% replacement ratio were prepared, and were consequently modified by small rejuvenator content. Results showed that the proposed method can successfully alleviate most concerns about the long-term properties of bio-asphalts. However, it was found that all bio-asphalts have lower resistance against fatigue and non-load related cracking.
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U2 - 10.1016/j.conbuildmat.2020.118137
DO - 10.1016/j.conbuildmat.2020.118137
M3 - Article
AN - SCOPUS:85082864218
VL - 251
JO - Construction and Building Materials
JF - Construction and Building Materials
SN - 0950-0618
M1 - 118137
ER -