Towards a Viscoelastic Model for Phase Separation in Polymer Modified Bitumen
2015 (English)Licentiate thesis, comprehensive summary (Other academic)
In this thesis, a review is given on the most popular polymers used today for polymer modification of bitumen. Furthermore, the development of a model for phase separation in polymer modified bitumen (PMB) is proposed, that will enable a better control and understanding of PMB phase behaviour, allowing thus to enhanced long-term performance. PMB is hereby considered as a blend and focus is placed on its structure, its equilibrium thermodynamics and its phase separation dynamics. The effects of dynamic asymmetry on phase separation in PMB are analysed with related theories and some image data. Based on the discussion in this thesis, it is concluded that the effects of dynamic asymmetry between bitumen and polymer should be taken into consideration when studying phase separation in PMB. By analysing related literature and image data, it is found that some features of viscoelastic phase separation are shown during the phase separation process in some PMBs. It is therefore possible and useful to develop a viscoelastic model for PMB to describe its phase separation behaviour. In this, the stress-diffusion coupling is expected to play a key role in the model. Finally, recommendations are made towards the future research which is needed to realize the proposed model.
Place, publisher, year, edition, pages
Stockholm: KTH Royal Institute of Technology, 2015. , v, 26 p.
TRITA-BKN. Bulletin, ISSN 1103-4270 ; 130
Polymer modified bitumen; storage stability; viscoelastic phase separation; PMB model
Research subject Civil and Architectural Engineering
IdentifiersURN: urn:nbn:se:kth:diva-163540ISBN: 978-91-7595-503-2OAI: oai:DiVA.org:kth-163540DiVA: diva2:800709
2015-04-20, B1, Brinellvägen 23, Stockholm, 13:00 (English)
Planche, Jean-Pascal, Tekn dr
Kringos, Niki, Associate professor
QC 201504092015-04-092015-04-072015-04-09Bibliographically approved
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