Print Email Facebook Twitter Study of Asphalt Binders Fatigue with a New Dynamic Shear Rheometer Geometry Title Study of Asphalt Binders Fatigue with a New Dynamic Shear Rheometer Geometry Author Apostolidis, P. (TU Delft Pavement Engineering) Kasbergen, C. (TU Delft Pavement Engineering) Bhasin, A. (The University of Texas at Austin) Scarpas, Athanasios (TU Delft Pavement Engineering; Khalifa University of Science and Technology) Erkens, S. (TU Delft Pavement Engineering) Date 2018 Abstract With the effort to predict precisely the lifetime of asphalt binders and subsequently optimize their utilization in a more economical way, the objective of this study was to introduce a new methodology to improve the fatigue characterization of asphalt binders through a new dynamic shear rheometer (DSR) sample testing geometry. Initially, numerical analyses were performed to study the geometry-related issues of standard DSR sample on time sweep tests and assisted on the effort to increase the understanding of DSR damage phenomena of asphalt samples. On the basis of these numerical analyses, a new testing geometry, the parallel hollow plate, was developed and its test results compared with the standard sample testing geometry. A single type of asphalt binder was assessed using amplitude sweep tests. The obtained results demonstrated a significant difference between the fatigue of the two sets of DSR sample geometries. On the basis of these, time sweep tests were conducted for the same sample geometries and the results demonstrated that the new testing geometry yields material response consistency under different loading conditions. The lifetime prediction of the standard parallel plates showed a significant difference with the newly developed DSR sample testing geometry by overestimating the total number of cycles until asphalt binder failure. The new testing geometry allowed the insolation of the damage area of asphalt binder by localizing the shear stresses in the samples’ periphery. To reference this document use: http://resolver.tudelft.nl/uuid:04b39ed5-7691-4330-8c81-9545596a1ce9 Publisher Transportation Research Board (TRB) Embargo date 2019-09-01 Source Transportation Research Board 97th Annual Meeting: 2018-1-7 to 2018-1-11, Washington DC, United States Event TRB 2018: 97th Annual Meeting of the Transportation Research Board, 2018-01-07 → 2018-01-11, Walter E. Washington Convention Center, Washington D.C., United States Series Transportation Research Record, 0361-1981 Part of collection Institutional Repository Document type conference paper Rights © 2018 P. Apostolidis, C. Kasbergen, A. Bhasin, Athanasios Scarpas, S. Erkens Files PDF TRR2018_DSRPHP.pdf 1.56 MB Close viewer /islandora/object/uuid:04b39ed5-7691-4330-8c81-9545596a1ce9/datastream/OBJ/view