Molecular dynamics study on the cohesive fracture properties of functionalized styrene-butadiene rubber modified asphalt

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Detail(s)

Original languageEnglish
Article number107715
Journal / PublicationResources, Conservation and Recycling
Volume208
Online published30 May 2024
Publication statusPublished - Sept 2024

Abstract

The cohesive fracture properties are significant for the fracture and deformation resistance of porous asphalt pavement. In this study, the cohesive fracture properties of the functionalized styrene-butadiene rubber modified asphalt composites are investigated by molecular dynamics simulations, and the influence of various types of functionalized styrene-butadiene rubber and temperature effects are examined through the tensile test. It is found that the cohesive resistance of asphalt composites is reinforced by functionalized styrene-butadiene rubber but damaged by rising temperatures. The functionalized styrene-butadiene rubber chains can impede the void generation at the initial stage, which can restrict the further separation of the asphalt matrix through the bridging effect. The H-bond interactions between the functional groups and polar components of asphalt play a crucial role in the non-bond interactions of functionalized styrene-butadiene rubber and asphalt, which can impede the localized movement and deformation of asphalt. The in-depth understanding of reinforcing mechanisms in the cohesive failure will help the design of functionalized styrene-butadiene rubber modified asphalt composites adopted in the next generation of porous asphalt pavement. © 2024 Elsevier B.V.

Research Area(s)

  • Asphalt, Cohesive fracture properties, Functionalized styrene-butadiene rubber, H-bond interactions, Molecular dynamics simulations