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Use of Multiple Stress Creep Recovery with Concentric Cylinder Geometries and Continuous Performance Grade Tests to Characterize Crumb Rubber-Modified Binders
Conference proceeding   Peer reviewed

Use of Multiple Stress Creep Recovery with Concentric Cylinder Geometries and Continuous Performance Grade Tests to Characterize Crumb Rubber-Modified Binders

Salih Kocak and M. Emin Kutay
Airfield and Highway Pavements 2023: Testing and Characterization of Pavement Materials, pp.62-74
07/14/2023–07/17/2023
International Airfield and Highway Pavements Conference 2023 (Austin, Texas, United States)
2023
DOI: https://doi.org/10.1061/9780784484913.007

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Abstract

This paper investigated the rutting potential and continuous grade temperature (C-PG) changes of original, aged, and crumb rubber-modified asphalt binders. The original binder was selected based on the research region, and it had a performance grade (PG) of 58-28. Modifications were performed using a single mesh size #20 CR modifier. C-PG of asphalt binders is determined at high, intermediate, and low temperatures. The multiple stress creep recovery test was conducted to evaluate the rutting performance and traffic grade of asphalt binders at regional high temperature as well as at high PG temperatures. MSCR tests were performed using bob and cup (BC), which is also known as the concentric cylinder, geometry since the use of parallel plate geometry was not allowed for binders with discrete particles larger than 250 microns in size. The results show that the crumb rubber modification improved the original binder's high rutting resistance along with traffic grade bumps and continuous PGs.

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