Evaluation of Environmental Effectiveness of Titanium Dioxide Photocatalyst Coating for Concrete Pavement
Self-cleaning, air-purifying concrete pavement is a rapidly emerging technology that can be constructed with air-cleaning agents with a super-hydrophilic photocatalyst such as titanium dioxide (TiO2). Although this technology has the potential to support an environmentally friendly road infrastructure, several design and operational parameters may affect its effectiveness and need to be evaluated. The objective of this study was to evaluate the environmental and mix design parameters that may affect the effectiveness of the environmental performance of TiO2 coating. An experimental program was conducted: the effects of relative humidity level, flow rate of pollutants, and mix design parameters, including contents of TiO2 and aggregate sizes, were investigated. The environmental efficiency of the samples to remove nitrogen oxides from the atmosphere was measured by using a newly developed laboratory setup. Results of the experimental program showed that the mix designs without fines achieved the highest photodegradation rates. In addition, the increase from 3% to 5% TiO2 resulted in little improvement in the nitrogen oxide removal efficiency, which decreased with the increase in the humidity level and the pollutant flow rate.
- Record URL:
- Summary URL:
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Availability:
- Find a library where document is available. Order URL: http://www.trb.org/Main/Blurbs/Concrete_Materials_2010_164406.aspx
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Authors:
- Dylla, Heather
- Hassan, Marwa M
- Mohammad, Louay N
- Rupnow, Tyson
- Wright, Earle
- Publication Date: 2010
Language
- English
Media Info
- Media Type: Print
- Features: Figures; Photos; References;
- Pagination: pp 46-51
- Monograph Title: Concrete Materials 2010
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Serial:
- Transportation Research Record: Journal of the Transportation Research Board
- Issue Number: 2164
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Air pollution; Air quality management; Coatings; Concrete pavements; Environmental impacts; Humidity; Laboratory tests; Mix design; Nitrogen oxides; Surface course (Pavements)
- Uncontrolled Terms: Photocatalysts; Titanium dioxide
- Subject Areas: Environment; Highways; Materials; Pavements; I15: Environment; I32: Concrete;
Filing Info
- Accession Number: 01158131
- Record Type: Publication
- ISBN: 9780309142960
- Report/Paper Numbers: 10-0963
- Files: TRIS, TRB, ATRI
- Created Date: May 30 2010 7:44AM