Please use this identifier to cite or link to this item: http://hdl.handle.net/1822/59955

TitlePhotocatalytic asphalt pavement: the physicochemical and rheological impact of TiO2 nano/microparticles and ZnO microparticles onto the bitumen
Author(s)Rocha Segundo, Iran Gomes da
Dias, Elisa Alexandra Lages
Fernandes, Filipa Daniela Pereira
Freitas, E. F.
Costa, Manuel F. M.
Carneiro, Joaquim A. O.
Keywordsbitumen modification
functionalisation
nanomaterials
photocatalysis
TiO 2
ZnO
Issue date23-Mar-2018
PublisherTaylor and Francis
JournalRoad Materials and Pavement Design
Abstract(s)A cost-effective solution to provide asphalt pavements with the photocatalytic property was addressed for the first time, based on the combination of low percentages of two semiconductors, TiO2and ZnO. Two photocatalytic techniques – spray deposition and bitumen modification – were used. With the former, the chemical properties were evaluated by FTIR after spraying the bitumen samples with two aqueous solutions, one with acid PH and another alkaline, of nano-TiO2. The solution with less chemical impact was the alkaline one. With the latter, Penetration, Softening Point, Mass Loss, Dynamic Viscosity, Complex moduli and Performance Grade, after the modification by TiO2nano/microparticles and ZnO microparticles, were analysed with two levels of ageing produced by the RTFOT. TiO2nano/microparticles and ZnO microparticles conducted to softer bitumens and better results of short-term ageing resistance and did not cause any deterioration to the bitumen before or after either short- or long-term ageing.
TypePreprint
URIhttp://hdl.handle.net/1822/59955
DOI10.1080/14680629.2018.1453371
ISSN1468-0629
Peer-Reviewedyes
AccessOpen access
Appears in Collections:FUNCTIONAL AND SMART MATERIALS AND SURFACES FOR ADVANCED APPLICATIONS (2018 - ...)

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