Journal of the Korean Recycled Construction Resources Institute (한국건설순환자원학회논문집)

Korean Recycled Construction Resources Institute (한국건설순환자원학회)
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Surface Characteristics of Concrete According to Types of Formworks

거푸집 종류에 따른 콘크리트 표면 특성

  • Park, Se-Eon (Department of Architecture and Civil Engineering, Chonnam National University) ;
  • Choi, Jeong-Il (Biohousing Research Center, Chonnam National University) ;
  • Lee, Bong-Kee (School of Mechanical Engineering, Chonnam National University) ;
  • Lee, Bang Yeon (School of Architecture, Chonnam National University)
  • 박세언 (전남대학교 건축토목공학과) ;
  • 최정일 (전남대학교 바이오하우징연구소) ;
  • 이봉기 (전남대학교 기계공학부) ;
  • 이방연 (전남대학교 건축학부)
  • Received : 2021.10.19
  • Accepted : 2021.10.28
  • Published : 2021.12.30
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Abstract

The purpose of this study is to investigate experimentally the physical/chemical properties of concrete surface according to types of formworks. Plywood formwork and coated plywood formwork were prepared. In addition, plywood formwork with sand paper was prepared to simulate deterioration of concrete or rough surface of concrete. Normal concrete was used in this study. The properties of concrete surface were investigated by visual inspection, scanning electron microscopy and energy-dispersive X-ray spectroscopy techniques, elemental mapping, 2D and 3D surface profile measurement, and zeta potential measurement. Test results showed that concrete in a coated formwork had smooth surface and concrete in the formwork with sand paper had rough surface. It was observed that properties of concrete surface depended on types of formworks. Furthermore, differences in surface roughness were significantly higher than those in chemical compositions and zeta potential.

이 연구의 목적은 거푸집 종류별로 콘크리트 표면의 물리/화학적 특성을 실험적으로 조사하는 것이다. 이를 위하여 건설공사에 일반적으로 사용되는 합판 거푸집과 코팅된 합판 거푸집을 준비하였고, 추가로 콘크리트 표면 열화나 거친 표면을 모사하기 위해 사포를 부착한 합판 거푸집을 준비하였다. 콘크리트는 일반 콘크리트를 사용하였다. 콘크리트 표면 특성은 육안관찰, 주사전자현미경 관찰, 성분 이미지 맵핑, 화학성분 분석, 2차원과 3차원 표면 형상 분석, 그리고 제타 전위 측정을 통해 조사하였다. 실험결과 코팅된 거푸집과 접한 콘크리트 표면이 가장 매끄럽고, 사포를 부착한 거푸집과 접한 콘크리트 표면이 가장 거친 것으로 나타났다. 이외에도 거푸집 종류별로 표면 특성에 뚜렷한 차이가 나타났다. 다만 표면 거칠기가 화학 성분이나 제타 전위에 비하여 차이가 크게 나타났다.

Keywords

Acknowledgement

본 연구는 국토교통부/국토교통과학기술진흥원의 지원으로 수행되었음(과제번호 21CTAP-C163851-01).

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