United States Department of Transportation
i
Self cleaning coatings for graffiti prevention removal and de-pollution (demo project).
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2012-01-01
[PDF-1.50 MB]
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Abstract:The primary focus of this report is to demonstrate the suitability of an inorganic polymer composite
coating for transportation related structures. This report presents the results of three field
applications and evaluation of graffiti resistance including removal techniques, self cleaning and de-pollution properties.
For field applications, pigment combinations were developed to match the colors of existing
structures or to blend with the surrounding areas. Techniques were developed and refined for
application of the coating.
To determine the effectiveness of graffiti resistance, several methods were assessed. Citric based
cleaner and baking soda pressure washer were found to be most effective. The results show that
the coating effectively cleans organic pollutants and the results compare well with those reported for
anatase titanium dioxide containing concrete and mortar. The exposure from the sun in the field was
successfully simulated in the lab using UV light. Based on the results obtained it can be concluded
that the composite coating is ready for large scale field applications.
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