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Title |
Evaluation of Durability and Self-clearing in Concrete Impregnated with Photocatalyst-colloidal Silica
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Authors |
김혁중(Hyeok-Jung Kim) ; 김영기(Young-Kee Kim) ; 권성준(Seung-Jun Kwon) |
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DOI |
https://doi.org/10.11112/jksmi.2018.22.5.047 |
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Keywords |
분산 실리카 ; 광촉매 ; 자기정화 ; 내구성 ; 표면침투제 Colloidal Silica ; Photocatalyst-TiO2 ; Self-clearing ; Durability |
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Abstract |
Concrete undergoes various deterioration on surface. Impregnant with silicate is usually applied to concrete surface and forms insoluble hydrates, which can provide many engineering advantages. In the work, concrete impregnated with colloidal silicate is used for durability enhancement in surface and self-clearing performance is evaluated with photocatalyst-TiO2 spraying. For the work, various tests are performed both for strength evaluation and durability evaluation such as absorption ratio, drying shrinkage, chloride penetration, sulfate resistance, and freezing/ thawing action. Furthermore, removal and self-clearing performance are evaluated with Acetaldehyde decomposition and Methylene blue decolorization. Through silicate impregnation and photocatalyst spraying, the impregnated concrete can have not only durability enhance but also self-clearing performance.
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