Investigation of Fracture Behavior of Recycled Asphalt Mixtures Using a Discrete Element Computational Model

Meng Xu, Jialiang Le, Tianhao Yan, Mugurel I Turos, Mihai Marasteanu, Decheng Feng

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

A discrete element computational model is used to simulate the fracture behavior of asphalt mixtures, containing different RAP proportions, at low temperatures. In this model, coarse aggregates are explicitly represented by rigid spherical particles. The bonds that connect these particles represent the fine aggregate matrix (FAM), which is defined as the combination of asphalt binder and fine aggregates. The model is used to investigate the fracture behavior of four asphalt mixtures with different RAP contents. Semi-circular bend (SCB) fracture tests are performed on the asphalt mixtures and bending beam rheometer (BBR) strength tests are performed on FAM at low temperatures.

Original languageEnglish (US)
Title of host publicationRILEM Bookseries
PublisherSpringer Science and Business Media B.V.
Pages1197-1204
Number of pages8
DOIs
StatePublished - Sep 26 2021

Publication series

NameRILEM Bookseries
Volume27
ISSN (Print)2211-0844
ISSN (Electronic)2211-0852

Bibliographical note

Publisher Copyright:
© 2022, The Author(s), under exclusive license to Springer Nature Switzerland AG.

Keywords

  • Discrete element method
  • Fine aggregate matrix
  • Fracture energy

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