TY - JOUR
T1 - End of life plastics to enhance sustainability of pavement construction utilizing a hybrid treatment of bio-oil and carbon coating
AU - Faisal Kabir, Sk
AU - Sukumaran, Suja
AU - Moghtadernejad, Sara
AU - Barjasteh, Ehsan
AU - Fini, Elham H.
N1 - Funding Information:
This research was sponsored by the National Science Foundation (Award Numbers 1935723 and 1928807 ) as well as internal support from Arizona State University. The authors acknowledge Daniel Burnett with Surface Measurement Systems for analyzing the surface energy of the treated and non-treated plastics.
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2021/4/5
Y1 - 2021/4/5
N2 - This paper evaluates the efficacy of a hybrid treatment for waste-plastic granules using a bio-oil and carbon coating to make the plastic granules compatible with asphalt binder, to promote environmental sustainability and enhance pavement performance. The bio-oil used in this study was derived from waste vegetable oil, and the coating with carbon was performed using graphene nanoparticles. To evaluate the extent of surface treatment of plastic granules, the formation of surface functional groups was tracked using Fourier transform infrared spectroscopy and Raman spectroscopy, and their surface energy before and after treatment was measured using inverse gas chromatography. In addition, the thermo-mechanical properties and phase separation of asphalt binders containing treated-plastic granules were studied. The study results showed that the total surface energy of plastic was increased by 49% after treatment-promoting interactions between plastics and binder. This in turn led to an 86% reduction in the separation of plastics and binder. The viscosity of binder containing plastics increased significantly; however, the binder with treated plastic had 56% lower viscosity than the binder with non-treated plastic. Binder with treated plastic had increased resistance to fatigue cracking, as evidenced by a significant reduction in G*Sin(δ) compared to the binder with non-treated plastic. Low-temperature properties were also improved for binder with treated plastic compared to binder with non-treated plastic. Finally, the moisture-induced shear-thinning index showed that the presence of treated plastic granules in binder made the binder less susceptible to moisture.
AB - This paper evaluates the efficacy of a hybrid treatment for waste-plastic granules using a bio-oil and carbon coating to make the plastic granules compatible with asphalt binder, to promote environmental sustainability and enhance pavement performance. The bio-oil used in this study was derived from waste vegetable oil, and the coating with carbon was performed using graphene nanoparticles. To evaluate the extent of surface treatment of plastic granules, the formation of surface functional groups was tracked using Fourier transform infrared spectroscopy and Raman spectroscopy, and their surface energy before and after treatment was measured using inverse gas chromatography. In addition, the thermo-mechanical properties and phase separation of asphalt binders containing treated-plastic granules were studied. The study results showed that the total surface energy of plastic was increased by 49% after treatment-promoting interactions between plastics and binder. This in turn led to an 86% reduction in the separation of plastics and binder. The viscosity of binder containing plastics increased significantly; however, the binder with treated plastic had 56% lower viscosity than the binder with non-treated plastic. Binder with treated plastic had increased resistance to fatigue cracking, as evidenced by a significant reduction in G*Sin(δ) compared to the binder with non-treated plastic. Low-temperature properties were also improved for binder with treated plastic compared to binder with non-treated plastic. Finally, the moisture-induced shear-thinning index showed that the presence of treated plastic granules in binder made the binder less susceptible to moisture.
KW - Asphalt binder
KW - Moisture susceptibility
KW - Polyethylene-terephthalate
KW - Waste plastic
KW - Waste vegetable oil
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U2 - 10.1016/j.conbuildmat.2021.122444
DO - 10.1016/j.conbuildmat.2021.122444
M3 - Article
AN - SCOPUS:85100386684
VL - 278
JO - Construction and Building Materials
JF - Construction and Building Materials
SN - 0950-0618
M1 - 122444
ER -