NDLI: Polymer-Bitumen Interaction: A Correlation Study with Six Different Bitumens to Investigate the Influence of SARA Fractions on the Phase Stability, Swelling, and Thermo-Rheological Properties of SBS-PmB

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Polymer-Bitumen Interaction: A Correlation Study with Six Different Bitumens to Investigate the Influence of SARA Fractions on the Phase Stability, Swelling, and Thermo-Rheological Properties of SBS-PmB

Content Provider	MDPI
Author	Wieser, Martin Schaur, Andreas Unterberger, Seraphin
Copyright Year	2021
Description	The aim of this work is to determine the influence of the bitumen chemistry on the rheological performance of bitumen and polymer modified bitumen (PmB), as well as the polymer distribution and storage stability. Six different bitumens and their 5 wt.% SBS mixtures are considered in this work. The bitumen composition was determined by SARA fractioning, which was then correlated with the glass transition temperature, complex modulus \|G\|, and phase angle, which were obtained by parallel-plate dynamic shear rheology in the temperature range of −25 to 65 °C. The polymer distribution, which was derived from fluorescence microscopy images and the storage stability (determined by tube test) also correlated with the SARA fractions. It was found that the saturates decrease \|G\| and T $g$ and increase the phase angle in crude bitumen, while the asphaltenes increase \|G\| and the phase angle. For PmB, the amount of swelling was determined by the saturate content of bitumen. The glass transition temperature of PmBs increases for low saturate and decreases for high saturate contents. \|G\| and the phase angle of PmBs correlates with the saturate content, with a varying influence depending on a high or low saturate content and the temperature range due to saturate depletion in the bitumen-rich phase and the varying vol% polymer-rich phase. The aromatic and resin fractions show no correlation in the considered bitumens and PmBs.
Starting Page	1273
e-ISSN	19961944
DOI	10.3390/ma14051273
Journal	Materials
Issue Number	5
Volume Number	14
Language	English
Publisher	MDPI
Publisher Date	2021-03-08
Access Restriction	Open
Subject Keyword	Materials Petroleum Engineering Polymer Modified Bitumen Sbs Bitumen Composition Polymer Compatibility Rheological Properties
Content Type	Text
Resource Type	Article

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