| Title |
Evaluation of Hydration Characteristics and NOx-removal Performances of Cement Paste Containing Refined TiO2 Obtained from Waste Sludge |
| Authors |
윤현노(Yoon, Hyunno) ; 서준호(Seo, Joonho) ; 김선혁(Kim, Seonhyeok) ; 배진호(Bae, Jinho) ; 길태건(Kil, Taegeon) ; 이행기(Lee, Haeng-Ki) |
| DOI |
https://doi.org/10.12652/Ksce.2021.41.4.0357 |
| Keywords |
시멘트; 광촉매; 수화반응; 질소산화물 제거성능 Cement; Photocatalyst; Hydration reaction; NOX-removal performance |
| Abstract |
The present study investigated the hydration properties and NOx-removal performances of the cement pastes containing three different
types of TiO2. Two commercially available TiO2 (P-25 and NP-400) and refined TiO2 (GST) obtained from waste sludge were incorporated
to cement paste at levels of 0, 5, 10, and 20 wt%. Isothermal calorimetry test results indicated that the TiO2 incorporation induced a notable
influence on the reaction kinetics of cement paste, showing the highest cumulative heat release in the samples containing P-25, followed
by NP-400 and GST. Quantitative X-ray diffractometry as calculated by the Rietveld method identified that the incorporated TiO2 promoted the formation of C-S-H, ultimately leading to the enhancement in the 28 day-compressive strength of cement pastes. As revealed by SEM/EDS analysis, the content of distributed Ti elements on the surface of the samples was in the order of P-25, GST, and NP-400.
Regardless, the NOx-removal performance was the highest in the sample containing P-25, followed by NP-400 and GST. |