Multi-Scale Characterization of Asphalt Mastic Rheology
2012 (English)In: Multi-Scale Modeling and Charactrization of Infrastructure Materials: Proceedings of the International RILEM Symposium Stockholm, June 2013 / [ed] Niki Kringos, Björn Birgisson, David Frost and Linbing Wang, Springer, 2012, 45-61 p.Conference paper (Refereed)
Understanding the influence of the fundamental parameters on asphalt mastic rheology is an important step towards improving the quality of asphalt mixtures. Due to the size of fillers and the sensitivity of the rheological behaviour of mastic, it is not always possible to study the effect of all parameters at one scale. Hence in this study, a theoretical framework is established for calculating the relative viscosity of asphalt mastics as a function of its filler concentration. Furthermore, a new test protocol is introduced for measuring the viscosity of asphalt mastic at higher temperatures and different filler concentrations. To characterize the fillers and their agglomeration and distribution inside solid mastics, X-ray tomography, laser scattering, scanning electron microscopy, BET and Helium Pycnometery were utilized. To characterize the energy dissipation potential of the mastics under cyclic loads, as a function of their fillers, the dynamic mechanical analyzer was utilized. The research shown in this paper further investigated the various dominant parameters related to fillers and bitumen in mastics and relate them to the workability and resulting mechanical properties and developed an overall framework to connect different scales. The developed characterization protocols have the potential to allow the asphalt engineers to design their hot and warm asphalt mixtures on a more fundamental and thus sustainable basis.
Place, publisher, year, edition, pages
Springer, 2012. 45-61 p.
, RILEM Bookseries, ISSN 2211-0844 ; 8
IdentifiersURN: urn:nbn:se:kth:diva-123731DOI: 10.1007/978-94-007-6878-9_4ISBN: 978-94-007-6877-2ISBN: 978-94-007-6878-9OAI: oai:DiVA.org:kth-123731DiVA: diva2:629644
Multi-Scale Modeling and Charactrization of Infrastructure Materials
QC 201306192013-06-172013-06-172013-06-19Bibliographically approved