TY - JOUR
T1 - Surface functionalization of silica nanoparticles with swine manure-derived bio-binder to enhance bitumen performance in road pavement
AU - Karnati, Sidharth Reddy
AU - Oldham, Daniel
AU - Fini, Elham H.
AU - Zhang, Lifeng
N1 - Funding Information:
The authors thank the financial support from the Joint School of Nanoscience and Nanoengineering of North Carolina A&T State University, a member of Southeastern Nanotechnology Infrastructure Corridor (SENIC) and National Nanotechnology Coordinated Infrastructure (NNCI), which is supported by the National Science Foundation (Award number 1542174). This work was also partially supported by the National Science Foundation (Award Numbers 1935723 and 1928795). The authors thank Dr. Shiahn Chen from MIT Materials Research Laboratory for performing TEM examination and Dr. Daniel J. Burnett from Surface Measurement Systems for performing surface energy test.
Publisher Copyright:
© 2020 Elsevier Ltd
PY - 2021/1/10
Y1 - 2021/1/10
N2 - Bitumen in road pavement is susceptible to oxidative aging, which negatively impacts its performance and reduces its service life. While surface-modified silica nanoparticles (SNPs) with silane coupling agents have shown to be promising additives to delay oxidative aging of bitumen, silane coupling agent is a costly option for large scale construction projects. Herein we introduced a sustainable and economic bio-binder made from hydrothermal liquefaction of swine manure for surface functionalization of SNPs. The bio-binder functionalized SNPs (BB-SNPs) were characterized by scanning electron microscope (SEM), dynamic light scattering (DLS), Fourier-transform infrared spectroscopy (FTIR), and inverse gas chromatography (IGC). Efficacy of BB-SNPs to enhance performance of bitumen including anti-aging, rutting resistance, susceptibility to fatigue cracking and low-temperature properties at relatively high loading (4 wt%) was valuated under low shear rate (900 rpm), low temperature (135 °C) and short time (30 min) mixing and compared with those of pristine and silane functionalized SNPs. BB-SNPs demonstrated superior capability to delay aging of bitumen while being economically viable. The research outcome highlighted sustainable resource for chemical functionalization of SNPs to enhance bitumen performance for road surfacing and roofing.
AB - Bitumen in road pavement is susceptible to oxidative aging, which negatively impacts its performance and reduces its service life. While surface-modified silica nanoparticles (SNPs) with silane coupling agents have shown to be promising additives to delay oxidative aging of bitumen, silane coupling agent is a costly option for large scale construction projects. Herein we introduced a sustainable and economic bio-binder made from hydrothermal liquefaction of swine manure for surface functionalization of SNPs. The bio-binder functionalized SNPs (BB-SNPs) were characterized by scanning electron microscope (SEM), dynamic light scattering (DLS), Fourier-transform infrared spectroscopy (FTIR), and inverse gas chromatography (IGC). Efficacy of BB-SNPs to enhance performance of bitumen including anti-aging, rutting resistance, susceptibility to fatigue cracking and low-temperature properties at relatively high loading (4 wt%) was valuated under low shear rate (900 rpm), low temperature (135 °C) and short time (30 min) mixing and compared with those of pristine and silane functionalized SNPs. BB-SNPs demonstrated superior capability to delay aging of bitumen while being economically viable. The research outcome highlighted sustainable resource for chemical functionalization of SNPs to enhance bitumen performance for road surfacing and roofing.
KW - Bitumen
KW - Hydrothermal liquefaction
KW - Oxidative aging
KW - Silica nanoparticles
KW - Surface modification
KW - Swine manure
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U2 - 10.1016/j.conbuildmat.2020.121000
DO - 10.1016/j.conbuildmat.2020.121000
M3 - Article
AN - SCOPUS:85092374885
SN - 0950-0618
VL - 266
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 121000
ER -