Abstract
The experimental investigation presented in this paper focused on storage stability of bituminous binders containing nano-sized additives. Several blends were prepared in the laboratory by combining three base bitumens with two different types of nanoclays and one type of carbon nanotubes at various dosages. A technique based on the combination of simple shear mixing and sonication was proposed to achieve adequate dispersion of nano-particles in bitumen. Capability of materials to withstand segregation phenomena was evaluated by means of viscosity measurements performed on samples derived from simulative laboratory storage tests. Results obtained in the study revealed that high-temperature stability of nano-reinforced binders is dependent upon physico-chemical properties of base components, thus highlighting the key role played in such a context by interaction mechanisms that take place between nano-additives and dispersing bituminous medium.
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Acknowledgments
The study reported in this paper is part of the FIRB research project on “Innovative nano-structured and polymer-modified bituminous materials” funded by the Italian Ministry of Education, University and Research (MIUR). Technical support provided by Nanocyl s.a. is gratefully acknowledged.
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Santagata, E., Baglieri, O., Tsantilis, L., Chiappinelli, G. (2016). Storage Stability of Bituminous Binders Reinforced with Nano-Additives. In: Canestrari, F., Partl, M. (eds) 8th RILEM International Symposium on Testing and Characterization of Sustainable and Innovative Bituminous Materials. RILEM Bookseries, vol 11. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-7342-3_7
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DOI: https://doi.org/10.1007/978-94-017-7342-3_7
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