Bio-oil/Pre-treated Waste PE Composite Modified Asphalt
FENG Xinjun
FU Hao
Abstract：To address the issues of poor storage stability and low-temperature crack resistance in waste plastic-modified asphalt,a twin-screw extruder was employed to pretreat waste polyethylene(PE)and subsequently it was combined with bio-oil to produce bio-oil/pretreated waste PE composite modified asphalt.Storage stability,low-temperature crack resistance,and high-temperature stability of modified asphalt were examined by separation test,rheological property test,fluorescence microscopy test,and Fourier-transform infrared spectroscopy test.The results show that the density of the pretreated waste PE is close to that of asphalt,and the presence of more polar groups and C=C structures increase its chemical activity,significantly enhancing the storage stability of waste PE modified asphalt.The bio-oil/pretreated waste PE composite modified asphalt forms a continuous network structure,which further improves the storage stability of waste PE modified asphalt and significantly increases its low-temperature crack resistance,while reduces its high-temperature stability.
Keywords：modified asphaltbio-oilpre-treated waste PEstorage stabilitylow temperature crack resistance
Publication Date：2024-01-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：10( 37-45,75 )