Application of titania from Ti-Salt flocculated sludge for UHPC

In this paper, Ultra High Performance Concrete (UHPC) specimens using Titania extracted from Ti-Salt agglomerated sludge analyzed both the microstructure and optical properties of the Ti component, which were exposed on the surface. Finally, the authors evaluated the performance of NO removal effect. Specimens containing Titania were prepared by conventional mixing method, sieving-compression method and painting method. The SEM results showed that the surface morphology of S-TiO2-C has a relatively hard shape with Titania particles in surface. In the quantitative analysis of XRF, the S-TiO2-C specimen had a sufficient C-S-H component with 57.9% Ti. XRD and FT-IR analysis showed that in S-TiO2-C specimen, both C-S-H gel and TiO2 peaks were observed, whereas TiO2 peaks of S-TiO2-P were predominant. Overall, it was judged that S-TiO2-C had a fine surface microstructure, and C-S-H gel and Titania were well fixed to have a stable bond. As a result of UV–vis spectroscopy analysis, it was clearly revealed that the more TiO2 particles on the sample surface, the better the absorbance. The NO removal performance from S-TiO2-C specimens was found to be able to remove NO by 90% compared to S-TiO2-P specimens.