Self-cleaning and Depolluting Geopolymer Coatings for Graffiti Prevention and Removal (Demonstration Project)
CAIT project no.: 211 RU8959
Fiscal Year: 2010/2011
Rutgers-CAIT Author(s): Perumalsamy Balaguru, Ph.D., Jeremy Brownstein, Matthew Klein
External Author(s): Stefanie Potapa
Sponsor(s): NJDOT, FHWA-USDOT
Principal investigator(s): Perumalsamy Balaguru, Ph.D.
Performing organization(s): Rutgers CAIT
Managing organization: Rutgers CAIT
In cooperation with: New Jersey Department of Transportation, Bureau of Research
Partner project manager: Stefanie Potapa
Supported by: FHWA-New Jersey Division
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 depollution 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.