Importance of triaxial stress state on asphalt binder tensile failure

Ramez Hajj, Amit Bhasin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The failure stress and strain, as well as ductility, depend greatly on the stress state to which the specimen is subjected. In previous studies of asphalt binders, the dependence of material behavior on temperature, loading rate, and aging has beenwell-examined. However, the influence of the triaxial state of stress that confines binders between mineral aggregates has not been studied extensively. In this work, a review of other materials indicates the importance of triaxiality on the failure of soft materials. Based on this review, the state of stress in asphalt materials was considered at three scales using a finite element simulation- a full depth asphalt pavement, a dense graded asphalt mixture, and a fine aggregate matrix (FAM) mix. Results indicated that the triaxiality increased as the scale became smaller. Further simulations also indicated that the poker chip test can serve as a "worst-case"scenario test where a very high triaxiality can be replicated in the lab for binder testing.

Original languageEnglish (US)
Title of host publicationAdvances in Materials and Pavement Performance Prediction II - Contributions to the 2nd International Conference on Advances in Materials and Pavement Performance Prediction, AM3P 2020
EditorsA. Kumar, A.T. Papagiannakis, A. Bhasin, D. Little
PublisherCRC Press/Balkema
Pages445-448
Number of pages4
ISBN (Electronic)9780367461690
DOIs
StatePublished - 2020
Externally publishedYes
Event2nd International Conference on Advances in Materials and Pavement Performance Prediction, AM3P 2020 - San Antonio, United States
Duration: May 27 2020May 29 2020

Publication series

NameAdvances in Materials and Pavement Performance Prediction II - Contributions to the 2nd International Conference on Advances in Materials and Pavement Performance Prediction, AM3P 2020

Conference

Conference2nd International Conference on Advances in Materials and Pavement Performance Prediction, AM3P 2020
Country/TerritoryUnited States
CitySan Antonio
Period5/27/205/29/20

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Mechanics of Materials
  • General Materials Science

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