Atomic insight into the nano-cracking behaviour of bitumen: considering oxidative aging effects

Luo, Lei; Liu, Pengfei; Leischner, Sabine; Oeser, Markus

doi:10.1080/14680629.2023.2180292

Cited by 7 publications

(1 citation statement)

References 46 publications

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“…[32][33][34] Sun et al 35 simulated the stretching process of asphalt and obtained the tensile strength by fitting the stress-strain curve. Luo et al 36 studied the trend of stress to investigate the effects of carbon nanotubes on the load-induced cracking process in asphalt through a similar method. In addition, Xu et al 37 investigated the interfacial adhesion behavior between asphalt and aggregate under dry and wet conditions before and after aging by calculating the interfacial adhesion work and stripping work.…”

Section: Introductionmentioning

confidence: 99%

The effect of photooxidation aging on the cohesion and interfacial adhesion behavior of epoxy asphalt with a composite acidic curing system based on molecular simulation

Min,

Li,

Chen

et al. 2024

J of Applied Polymer Sci

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This paper investigated the cross‐linking network structure of epoxy asphalt (EA) with the different ratio of composite curing agents, and further determined the effect of photooxidation aging on the tensile and interfacial adhesion behavior of EA with different cross‐linking network structures through molecular simulation. Based on the molecular models of EA and the interface model between EA and aggregate, the crosslinking network structural characteristics and tensile mechanical behavior were determined. The interfacial adhesion behavior and the mechanization were further studied. The results indicate that 20‐EA and 6‐EA have an epoxy resin cross‐linked network with uniform pore structure and phase distribution. 2‐EA showed a denser cross‐linking network and uneven aggregation phenomenon. Photooxidative aging alleviated the aggregation phenomenon. A dense cross‐linking network improved the tensile strength and the ability of tensile performance to resist photooxidation aging. The interface of EA‐quartz exhibited higher adhesion strength than EA‐calcite due to the closer distance and stronger nonbonding interactions between EA and quartz. The low anhydride content and photooxidation aging made EA approach to the aggregate interface, increasing nonbonding interaction and interfacial adhesion strength. In addition, quartz aggregates were more suitable for application in EA mixtures due to the higher interfacial adhesion strength and lower water sensitivity.

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