Weathering of Two Anti-Graffiti Protective Coatings on Concrete Paving Slabs
Abstract
:1. Introduction
2. Materials and Methods
2.1. Application of Anti-Graffiti Coatings
2.2. Ageing Trials
2.3. Painting and Cleaning Graffiti
2.4. Characterization of the Physical Properties
3. Results and Discussion
3.1. Characterization of the Surface Properties of Concrete
3.2. Ageing of the Anti-Graffiti Coatings
3.3. Graffiti Removal
4. Conclusions
Acknowledgments
Author Contributions
Conflicts of Interest
References
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Weather Conditions | Apr.–Jul. 2015 | Aug.–Nov. 2015 | Nov. 2015–Feb. 2016 | Feb.–May 2016 | Total |
---|---|---|---|---|---|
Sun (h) | 653 | 305 | 178 | 490 | 1626 |
Rain (mm) | 105 | 160 | 215 | 196 | 676 |
Warmest daily mean air temperature (°C) | 24.7 | 22.05 | 13.7 | 18.25 | 24.7 |
Coolest daily mean air temperature (°C) | 6.2 | 7.25 | –0.25 | 2 | –0.25 |
Surface Parameters | UT | P | S |
---|---|---|---|
L* | 68.54 (1.68) | 67.06 (0.38) | 70.21 (0.32) |
a* | 0.13 (0.08) | 0.17 (0.11) | 0.27 (0.02) |
b* | 7.71 (0.40) | 8.31 (0.44) | 9.26 (0.45) |
ΔE* | – | 1.78 (0.33) | 1.91 (0.36) |
Gloss at 85° | 4.02 (1.53) | 8.28 (3.83) | 17.46 (2.57) |
Rz (µm) | 23 (4) | 21 (4) | 18 (3) |
contact angle (°) | 18.3 (7.6) | 104 (3.5) | 87.6 (0.7) |
δ × 10−12 (kg/m·s·Pa) | 2.62 (0.21) | 2.65 (0.79) | 3.12 (0.94) |
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Carmona-Quiroga, P.M.; Jacobs, R.M.J.; Viles, H.A. Weathering of Two Anti-Graffiti Protective Coatings on Concrete Paving Slabs. Coatings 2017, 7, 1. https://doi.org/10.3390/coatings7010001
Carmona-Quiroga PM, Jacobs RMJ, Viles HA. Weathering of Two Anti-Graffiti Protective Coatings on Concrete Paving Slabs. Coatings. 2017; 7(1):1. https://doi.org/10.3390/coatings7010001
Chicago/Turabian StyleCarmona-Quiroga, Paula M., Robert M. J. Jacobs, and Heather A. Viles. 2017. "Weathering of Two Anti-Graffiti Protective Coatings on Concrete Paving Slabs" Coatings 7, no. 1: 1. https://doi.org/10.3390/coatings7010001