| Title |
Effect of Fineness of Cement on the NOx removal Performance of Photocatalytic Cement Paste |
| Authors |
최재원(Choi, Jaewon) ; 기태경(Ki, Tae-Kyoung) ; 차완호(Cha, Wan-Ho) ; 한민철(Han, Min-Cheol) |
| DOI |
https://doi.org/10.5659/JAIK.2021.37.8.213 |
| Keywords |
Photocatalyst; NOx removal; cement; Fineness of cement; Particle Size of cement; Roughness of surface |
| Abstract |
In this study, we researched a method to increase the photocatalytic reaction efficiency of TiO2 particles while fixing TiO2 to the concrete
surface using cement paste. For this purpose, we analyzed effects of cement fineness on the surface area and air purification performance of
hardened cement paste containing TiO2. At the test level of this study, it was confirmed that the lower the fineness of OPC shows the better
the NO and NOx removal rates, indicating better air purification performance. To identify the cause, the particle size distribution of the
cement, the roughness of the surface of the hardened paste, and the lightness were analyzed. The results of the analysis show that the lower
the fineness of cement, the surface roughness increases, so the exposed area of TiO2 contained in the paste also increases. As a result, NOx
removal rate is improved when the lower the fineness of cement. |