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The utilization of nanomaterials in the field of binder materials for road paving has attracted researchers' attention in recent years. This study presented the performance properties of a binder modified with carbon nanotubes (CNT) and polyethylene (PE). The rheological properties, adhesion behavior, morphology, and storage stability of the modified asphalt were investigated. Experimental analysis indicated a positive effect of CNT/PE composites on the performance of the binder. The results indicate that the combined use of CNT and PE shows a significant enhancement on complex modulus, viscosity, and creep recovery of the binder at high temperatures and a great decrease in compliance, indicating great resistance to permanent deformation. Meanwhile, only using CNT to improve the high temperature performance of the binder is limited due to high shear mixing. CNT/PE modifiers enhance the cracking resistance at low temperatures and moisture damage resistance. The CNT/PE melt mixing composites endow asphalt with stronger cracking resistance, better resistance to moisture damage and workability. Asphalt with CNT/PE composites formed an even dispersion system. Notably, CNT bridges on the interface between PE phase and asphalt for the two modified asphalts, which reinforces the cohesion of interface. Asphalt with CNT/PE composites showed improved storage stability in comparison with PE modified asphalt. [ABSTRACT FROM AUTHOR]

• The modification of slurry oil for de-oiled asphalt leads to a more reasonable chemical composition. • Radial SBS is efficient on improving high temperature performance of asphalt blends. • The performance of blends with 10% CR is comparable to that containing 5% SBS. • Microstructure and micromorphology of blends verified their mechanical response. The demand for high quality asphalt binder is continuously increasing in road construction and paving industry, most of which derives from vacuum distillation of petroleum. Meanwhile, deoiled asphalt (DOA) and slurry oil are the by-products of solvent deasphalting and fluid catalytic cracking (FCC) respectively. This paper developed high-quality road asphalt binder from DOA modified with FCC slurry oil and polymers. Different styrene-butadienestyrene (SBS) and crumb rubber (CR) were selected as polymer modifiers. The optimized blending ratio of DOA/slurry was determined. Moreover, the effects of various modifiers on rheological properties, low-temperature cracking resistance, and microstructure of the resulting asphalt were evaluated. The results indicated that the incorporation of FCC slurry oil results in a more reasonable chemical composition and the improved cracking resistance of the blends. For different structure of SBS, radial SBS is more efficient to enhance the high temperature performance of DOA/slurry blends. The DOA/slurry with 10% CR shows the approximate value in viscosity, complex modulus and |G*|/sinδ in comparison of sample with 5% linear SBS, demonstrating significant effectiveness of CR on improving the high temperature performance of DOA/slurry. Linear SBS is a better candidate improving low temperature performance of DOA/slurry. The FTIR analysis indicated that the double bonds of SBS take part in the chemical cross-linking reaction, whereas CR improves property of asphalt only by physical interactions. Regarding to morphology, linear SBS presents the homogeneous dispersion in the form of cycle particles, whereas radial SBS displays a rather irregular form of polymer phase. CR phase shows elongated features and forms a continuous phase when reaching 20% content, which significantly reinforces the mechanical property of the asphalt. [ABSTRACT FROM AUTHOR]