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Published in:
2019 | OriginalPaper | Chapter
Effect of Morphology on High-Temperature Rheological Properties of Polymer-Modified Bitumen
Authors : Jiqing Zhu, Xiaohu Lu
Published in: RILEM 252-CMB Symposium
Publisher: Springer International Publishing
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Abstract
This paper employs isothermal annealing at different temperatures to obtain different microstructures of the same modified bitumen with styrene-butadiene-styrene (SBS) copolymer. The effect of polymer-modified bitumen (PMB) morphology on high-temperature rheological properties is investigated based on the same material. The characteristic wavelength ξ of PMB microstructure was calculated from the fluorescence microscopy images. Dynamic shear rheometer (DSR) measurements and multiple stress creep and recovery (MSCR) tests were performed. The PMB morphology-rheology correlation was discussed within the studied temperature and frequency range. Comparing with a binary droplet-in-matrix microstructure, a homogenous PMB morphology tends to store more energy during shear cycles and reach higher recovery after the loading.