Abstract
In this paper, a molecular dynamics simulation was used to examine the physical, mechanical, and interfacial adhesion characteristics of graphene-modified asphalt. The results show that the physical properties, mechanical properties and interfacial adhesion work of modified graphene are higher than those of the base asphalt model, indicating that the addition of graphene can improve the mechanical properties and interfacial interaction of asphalt. Asphalt and aggregate mainly interact through physical adsorption, and the Van der Waals force plays an important role in the adhesion behavior of the asphalt-calcite interface. There is an optimal value for the content of graphene, such that the content of graphene added to the asphalt should not be too high. Considering the graphene price factor and modification effect, the graphene content studied is optimal at 1.79 w/%.
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