TY - GEN
T1 - Importance of triaxial stress state on asphalt binder tensile failure
AU - Hajj, Ramez
AU - Bhasin, Amit
N1 - Publisher Copyright:
© 2021 Taylor & Francis Group, London.
PY - 2020
Y1 - 2020
N2 - 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.
AB - 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.
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U2 - 10.1201/9781003027362-103
DO - 10.1201/9781003027362-103
M3 - Conference contribution
AN - SCOPUS:85117404650
T3 - Advances in Materials and Pavement Performance Prediction II - Contributions to the 2nd International Conference on Advances in Materials and Pavement Performance Prediction, AM3P 2020
SP - 445
EP - 448
BT - Advances in Materials and Pavement Performance Prediction II - Contributions to the 2nd International Conference on Advances in Materials and Pavement Performance Prediction, AM3P 2020
A2 - Kumar, A.
A2 - Papagiannakis, A.T.
A2 - Bhasin, A.
A2 - Little, D.
PB - CRC Press/Balkema
T2 - 2nd International Conference on Advances in Materials and Pavement Performance Prediction, AM3P 2020
Y2 - 27 May 2020 through 29 May 2020
ER -