Rheological Properties of Graphene/Polyethylene Composite Modified Asphalt Binder

Abstract

Abstract: To improve the overall road performance of asphalt binders, especially the high temperature performance, a new asphalt binder was prepared by combining high-quality and inexpensive polyethylene (PE) with graphene nanoplatelets (GNPs) with a high-speed shear mixer. Meanwhile, the rheological properties and action mechanism of the composite modified asphalt binders were subsequently investigated using temperature sweep (TeS), multiple stress creep recovery (MSCR), linear amplitude sweep (LAS), bending beam rheometer (BBR), and fourier transform infrared spectroscopy (FTIR). The results show that GNPs and PE synergistically improve the high-temperature performance of asphalt binders and enhance the high-temperature rutting resistance of pavements; the pre-blended PE/GNPs masterbatch has good medium-temperature fatigue and low-temperature cracking resistance. Meanwhile, no new absorption peaks appeared in the FTIR spectra of the composite modified asphalt, indicating that mainly physical co-blending of graphene and polyethylene occurred in the asphalt matrix.

Key words: graphene nanoplatelet, polyethylene, asphalt binder, rheological property, composite modification

CLC Number:

U414

LI Baoyu. Rheological Properties of Graphene/Polyethylene Composite Modified Asphalt Binder[J]. BULLETIN OF THE CHINESE CERAMIC SOCIETY, 2021, 40(7): 2461-2468.

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