A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Sustainable Photocatalytic Asphalt Pavements for Mitigation of Nitrogen Oxide and Sulfur Dioxide Vehicle Emissions
The ability of titanium dioxide () photocatalytic nanoparticles to trap and decompose organic and inorganic air pollutants render them a promising technology as a pavement coating to mitigate the harmful effects of vehicle emissions. This technology may revolutionize construction and production practices of hot-mix asphalt by introducing a new class of mixtures with superior environmental performance. The objective of this study was to assess the benefits of incorporating into asphalt pavements. To achieve this objective, the photocatalytic effectiveness and durability of a water-based spray coating of was evaluated in the laboratory. This study also presents the field performance of the country’s first air-purifying photocatalytic asphalt pavement, located on the campus of Louisiana State University. Laboratory evaluation showed that was effective in removing and pollutants from the air stream, with an efficiency ranging from 31–55% for pollutants and 4–20% for pollutants. The maximum and removal efficiencies were achieved at an application rate of . The efficiency of reduction is affected by the flow rate of the pollutant, relative humidity, and ultraviolet (UV) light intensity. In the field, concentrations were monitored for both the coated and uncoated sections to directly measure photocatalytic degradation. Furthermore, nitrates were collected from the coated and uncoated areas for evidence of photocatalytic reduction. Results from both approaches show evidence of photocatalytic reduction. Further field evaluation is needed to determine the durability of the surface coating.
Sustainable Photocatalytic Asphalt Pavements for Mitigation of Nitrogen Oxide and Sulfur Dioxide Vehicle Emissions
The ability of titanium dioxide () photocatalytic nanoparticles to trap and decompose organic and inorganic air pollutants render them a promising technology as a pavement coating to mitigate the harmful effects of vehicle emissions. This technology may revolutionize construction and production practices of hot-mix asphalt by introducing a new class of mixtures with superior environmental performance. The objective of this study was to assess the benefits of incorporating into asphalt pavements. To achieve this objective, the photocatalytic effectiveness and durability of a water-based spray coating of was evaluated in the laboratory. This study also presents the field performance of the country’s first air-purifying photocatalytic asphalt pavement, located on the campus of Louisiana State University. Laboratory evaluation showed that was effective in removing and pollutants from the air stream, with an efficiency ranging from 31–55% for pollutants and 4–20% for pollutants. The maximum and removal efficiencies were achieved at an application rate of . The efficiency of reduction is affected by the flow rate of the pollutant, relative humidity, and ultraviolet (UV) light intensity. In the field, concentrations were monitored for both the coated and uncoated sections to directly measure photocatalytic degradation. Furthermore, nitrates were collected from the coated and uncoated areas for evidence of photocatalytic reduction. Results from both approaches show evidence of photocatalytic reduction. Further field evaluation is needed to determine the durability of the surface coating.
Sustainable Photocatalytic Asphalt Pavements for Mitigation of Nitrogen Oxide and Sulfur Dioxide Vehicle Emissions
Hassan, Marwa (author) / Mohammad, Louay N. (author) / Asadi, Somayeh (author) / Dylla, Heather (author) / Cooper, Sam (author)
Journal of Materials in Civil Engineering ; 25 ; 365-371
2012-08-27
72013-01-01 pages
Article (Journal)
Electronic Resource
English
| British Library Online Contents | 2013
Laboratory and Field Evaluation of Sustainable Photocatalytic Asphalt Pavements
| Online Contents | 2012
| British Library Online Contents | 2012