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http://dx.doi.org/10.14190/JRCR.2020.8.3.356

Self-Cleaning of Mortar Mixed with Photocatalyst by Using Methylene Blue Solution  

Yang, In-Hwan (Department of Civil Engineering, Kunsan National University)
Park, Ji-Hun (Department of Civil Engineering, Kunsan National University)
Park, Hee-Woong (Department of Civil Engineering, Kunsan National University)
Jung, Hoe-Won (Department of Civil Engineering, Kunsan National University)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.8, no.3, 2020 , pp. 356-364 More about this Journal
Abstract
An experimental study to investigate the effect of self-cleaning of mortar mixed with photocatalyst was performed out in this study. Test parameters included the photocatalyst content and surface roughness of the specimens. The experimental mortar specimens were manufactured by mixing a photocatalyst by cement weight of 2.5%, 5.0%, 7.5% and 10.0%. In addition, the surface roughness was categorized into three cases. They included flat surface condition, little surface roughness(medium roughness), and high surface roughness. After mortar specimens were cured for 28 days, they were illuminated by an ultraviolet lamp for 24 hours and immersed in a methylene blue conditioning solution for 12 hours. Thereafter, an ultraviolet(UV) lamp was illuminated on the specimens for 48 hours in an experimental chamber and then the color change of methylene blue solution was measured by using a spectrophotometer over illuminating time of UV lamp. The color change of methylene blue tended to increase as photocatalyst contents increased. Test results meant that photocatalyst was effective for self-cleaning in mortar. However, the color change of the methylene blue solution did not show a noticeable tendency at different surface roughness conditions. It might be due to the uneven photocatalyst distribution on the surface of mortar specimens.
Keywords
Photocatalyst; Mortar; Self-cleaning; Roughness; Methylene blue solution;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
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