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http://dx.doi.org/10.14190/JRCR.2022.10.1.56

Evaluation of Self-Cleaning Performance of Mortar Using Nano-Titanium Dioxide Photocatalytic Coating  

Yang, In-Hwan (Department of Civil Engineering, Kunsan National University)
Jeon, Hyo-Jin (Department of Civil Engineering, Kunsan National University)
Lee, Seung-Jin (Department of Civil Engineering, Kunsan National University)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.10, no.1, 2022 , pp. 56-65 More about this Journal
Abstract
This paper aims at estimating self-cleaning performance of mortar coated with photocatalytic suspension under various conditions. Experimental variables included the concentration (1.5 % and 3.0 %) of photocatalytic suspension for coating mortar specimen, the presence of hydrophilic agent in photocatalytic suspension, and applying the primer on the surface of mortar. The color change of methylene blue solution increased and accordingly self-cleaning performance increased as photocatalytic concentration increased. The presence of hydrophilic agent in photocatalytic suspension slightly decreased the self-cleaning performance compared to the conventional photocatalytic suspension. Test results also showed that mortar specimen including primer and specimen not including primer did not show significantly different self-cleaning performance. In addition, cracks on the surface of mortar specimens decreased as the photocatalytic concentration increased. Therefore, increase in cracks on the surface of mortar at different photocatalytic concentration might adversely affect the self-cleaning performance of mortar specimens.
Keywords
Photocatalytic coatings; Air pollution; Mortar; Methylene blue solution; Microstructure;
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