Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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Mechanical Performance Evaluation in Concrete Impregnated with Silicate for TiO2 Utilization

광촉매 활용을 위한 실리케이트 기반 표면 침투제를 적용한 콘크리트의 역학적 성능 평가

  • Kim, Hyeok-Jung (Industry Academic Cooperation Foundation, Hankyong National University) ;
  • Kim, Young-Kee (Department of Chemical Engineering, Hankyong National University) ;
  • Kwon, Seung-Jun (Department of Civil Engineering, Hannam University)
  • 김혁중 (한경대학교 산학협력단) ;
  • 김영기 (한경대학교 화학공학과) ;
  • 권성준 (한남대학교 건설시스템공학과)
  • Received : 2018.05.01
  • Accepted : 2018.06.22
  • Published : 2018.06.30
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Abstract

Degradations of durability and aesthetic performance in concrete happen during service life due to surface deterioration and dirt stains. Recently, many researches have been performed on self-cleaning and surface enhancement through surface impregnant using photocatalytic reaction with VOCs(Volatile Organic Compounds) removal. This paper is for preliminary study on surface impregnation with silicate and photocatalysis - $TiO_2$. For the work, two types of silicate based impregnants(CS - Coloidal Silica and SC - Sodium Alumina Silicate) are considered. Several tests for viscosity and surface tension are performed, and pull-off test on impregnated concrete is performed. For the surface impregnated concrete, $TiO_2$ is absorbed through submerging and spraying conditions. Through compressive strength test and SEM analysis, it is evaluated that spraying $TiO_2$ on surface impregnated concrete after 30min. of drying period is very effective both for strength enhancement and surface densification.

콘크리트 구조물은 사용기간 동안 표면 열화 및 오염으로 인해 미관의 저하 및 내구성 저하가 발생된다. 최근 들어 광촉매(photocatalyst)를 이용하여 유기산화물을 제거하고 표면자기정화(self cleaning) 성능을 개선하려는 연구가 시도되고 있다. 본 논문은 실리케이트 기반 광촉매 함침을 위한 기초연구로서 CS와 SC 두 가지 함침 용액을 대상으로 하였다. 실리케이트 기반 용액의 점성과 표면장력을 평가하였으며 콘크리트에 적용하여 부착강도를 평가하였다. 또한 실리케이트 용액에 침지된 콘크리트에 대하여, 광촉매 용액의 침지 및 분무를 한 후 콘크리트 강도 평가와 SEM을 통한 표면상태를 조사하였다. 실리케이트 용액의 침지 후 30분간 기건 상태를 유지하고 분무하는 방법이 가장 효과적으로 광촉매의 표면 흡착을 유도하는 것으로 평가되었으며, 강도 개선에도 효과적임을 알 수 있다.

Keywords

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