Abstract
The purpose of this study is to evaluate the pressurized titanium dioxide (TiO2) fixation method and its application to hardened vertical structures nearby the road. The usefulness of pressurized TiO2 fixation method for the application of vertical concrete road structures such as side ditches, barriers, and retaining walls was evaluated based on conditions of experiment taking cognizance of pressurization time and pressure. To confirm the TiO2 distribution characteristics, penetration depth and mass ratio of TiO2 particles in the concrerte specimens were measured after pressurezed fixation. Additionally, the removal efficiencies of nitrogen oxides (NOx) were evaluated using the NOx analyzing system. The penetration depth and surface mass ratio of TiO2 increased as increasing pressure and pressurization time. To achieve the efficiency of NOx removal more than 40%, a pressure 0.2 MPa and higher than 0.3 MPa with a pressurization time at least 10 seconds and 5 seconds were required, respectively. The finding demonstrated that the pressured TiO2 fixing method was effective, indicating that the suggested NOx removal technology is adequately appropriate to existing vertical concrete road constructions.
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Acknowledgments
This work is supported by the Korea Agency for Infrastructure Technology Advancement (KAIA) grant funded by the Ministry of Land, Infrastructure and Transport (grant number 22POQW-C152342-04).
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Kim, Y.K., Ahn, H.R., Kim, K.S. et al. Applicability of Pressurized TiO2 Fixation Method to Existing Vertical Concrete Road Structures. KSCE J Civ Eng 26, 3725–3733 (2022). https://doi.org/10.1007/s12205-022-1801-y
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DOI: https://doi.org/10.1007/s12205-022-1801-y