| Title |
NOx-removal and Sound-absorption Performances of Photocatalytic Porous Concrete Prepared by Various TiO2 Application Methods |
| Authors |
윤현노(Yoon, Hyunno) ; 서준호(Seo, Joonho) ; 김선혁(Kim, Seonhyeok) ; 장대익(Jang, Daeik) ; 배진호(Bae, Jinho) ; 이행기(Lee, Haeng-Ki) |
| DOI |
https://doi.org/10.12652/Ksce.2022.42.2.0163 |
| Keywords |
포러스 콘크리트; 바텀애쉬; 흡음성능; 광촉매; 질소산화물 제거성능 Porous concrete; Bottom ash; Sound absorption; Photocatalyst; NOx-removal performance |
| 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. |