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http://dx.doi.org/10.12652/Ksce.2022.42.2.0163

NOx-removal and Sound-absorption Performances of Photocatalytic Porous Concrete Prepared by Various TiO2 Application Methods  

Yoon, Hyunno (Korea Advanced Institute Science and Technology)
Seo, Joonho (Korea Advanced Institute Science and Technology)
Kim, Seonhyeok (Korea Advanced Institute Science and Technology)
Jang, Daeik (Korea Advanced Institute Science and Technology)
Bae, Jinho (Korea Advanced Institute Science and Technology)
Lee, Haeng-Ki (Korea Advanced Institute Science and Technology)
Publication Information
KSCE Journal of Civil and Environmental Engineering Research / v.42, no.2, 2022 , pp. 163-170 More about this Journal
Abstract
The present study investigates NOx-removal and sound-absorption performances of photocatalytic porous concrete prepared by various TiO2 application methods. Photocatalytic porous concrete samples were prepared by one of the following: 1) mechanically mixing TiO2 during casting; 2) mixing bottom ash aggregate pretreated with TiO2 during casting; and 3) spraying TiO2 solution to the normally fabricated porous concrete. The test results indicated that the mechanical mixing of TiO2 decreased the compressive strength as the added TiO2 content increased. The use of pretreated bottom ash aggregate reduced the porosity, yet the compressive strength of the concrete was similar to that measured from the former method. Porous concrete samples sprayed with the TiO2 solution exhibited enhanced compressive strength, while the porosity was analogous to those measured from other methods. The NOx-removal performance was the highest in the samples sprayed with the TiO2 solution, followed by the samples using pretreated bottom ash aggregate and mechanically mixed TiO2. The samples with mechanically mixed TiO2 identified a relationship between soundabsorption performance and porosity. However, no particular tendency was observable in the samples with other TiO2 application methods.
Keywords
Porous concrete; Bottom ash; Sound absorption; Photocatalyst; $NO_x$-removal performance;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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