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 dif-ferent 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 vis-cosity 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.
Storage Stability of Bituminous Binders Reinforced with Nano-Additives / Santagata, Ezio; Baglieri, Orazio; Tsantilis, Lucia; Chiappinelli, Giuseppe. - STAMPA. - RILEM BOOKSERIES Vol.11:(2016), pp. 75-87. (Intervento presentato al convegno 8th RILEM International Symposium on Testing and Characterization on Sustainable and Innovative Bituminous Materials tenutosi a Ancona nel 7-9 ottobre 2015) [10.1007/978-94-017-7342-3_7].
Storage Stability of Bituminous Binders Reinforced with Nano-Additives
SANTAGATA, Ezio;BAGLIERI, ORAZIO;TSANTILIS, LUCIA;CHIAPPINELLI, GIUSEPPE
2016
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 dif-ferent 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 vis-cosity 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.Pubblicazioni consigliate
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https://hdl.handle.net/11583/2621728
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