Using bio-based rejuvenator derived from waste wood to recycle old asphalt
Document Type
Article
Publication Date
11-20-2018
Department
Department of Civil, Environmental, and Geospatial Engineering
Abstract
The objective of this study is to investigate the possibility of using bio-oil derived from waste wood as a rejuvenator to recycle aged asphalt binders. In this study, petroleum asphalt of PG58-28 was selected as the base binder. The bio-oil rejuvenators with concentrations of 10%, 15% and 20% by weight were added into the Pressure Aging Vessel (PAV) aged base binder to prepare the bio-rejuvenated asphalts. Through the chemical compounds analysis of the bio-oil using the Gas Chromatograph Mass Spectrometer (GC–MS) test, it can be found that the bio-oil derived from waste wood contains a high content of light compounds, including phenol, naphthalene, diethyl phthalate and so on. The rheological properties of bio-rejuvenated asphalts were evaluated and compared with the virgin and aged asphalts by Rotational Viscometer (RV), Dynamic Shear Rheometer (DSR) and Bending Beam Rheometer (BBR) tests. The bio-rejuvenator can increase the viscous components and alleviate the stiffness of the aged asphalt binder. The high content of light compounds in the bio-oil balanced the chemical compounds of the aged asphalt. As a result, the rutting resistance and fatigue resistance of the aged asphalt binder were restored by the bio-oil significantly. The low temperature crack resistance of aged asphalt binder can be restored to approximately to that of the PG 58-28 by the bio-rejuvenator with the concentration of 15% and 20%. The bio-oil concentration had less impact on the rheological properties of bio-rejuvenated asphalts when the bio-oil concentration was higher than 15%. Therefore, the bio-oil with a concentration of 15% was recommended to rejuvenate the aged asphalt binder to be reused in the construction of pavement.
Publication Title
Construction and Building Materials
Recommended Citation
Zhang, R.,
You, Z.,
Wang, H.,
Chen, X.,
Si, C.,
&
Peng, C.
(2018).
Using bio-based rejuvenator derived from waste wood to recycle old asphalt.
Construction and Building Materials,
189, 568-575.
http://doi.org/10.1016/j.conbuildmat.2018.08.201
Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/118
Publisher's Statement
© 2018 Elsevier Ltd. All rights reserved. Publisher’s version of record: https://doi.org/10.1016/j.conbuildmat.2018.08.201