Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Photocatalytic asphalt pavement: the physicochemical and rheological impact of TiO2 nano/microparticles and ZnO microparticles onto the bitumen
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, TiO2 and 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 TiO2 nano/microparticles and ZnO microparticles, were analysed with two levels of ageing produced by the RTFOT. TiO2 nano/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.
Photocatalytic asphalt pavement: the physicochemical and rheological impact of TiO2 nano/microparticles and ZnO microparticles onto the bitumen
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, TiO2 and 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 TiO2 nano/microparticles and ZnO microparticles, were analysed with two levels of ageing produced by the RTFOT. TiO2 nano/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.
Photocatalytic asphalt pavement: the physicochemical and rheological impact of TiO2 nano/microparticles and ZnO microparticles onto the bitumen
Rocha Segundo, Iran Gomes da (Autor:in) / Dias, Elisa Alexandra Lages (Autor:in) / Fernandes, Filipa Daniela Pereira (Autor:in) / Freitas, Elisabete Fraga de (Autor:in) / Costa, Manuel Filipe (Autor:in) / Carneiro, Joaquim Oliveira (Autor:in)
Road Materials and Pavement Design ; 20 ; 1452-1467
18.08.2019
16 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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