Journal of the Korean Society of Hazard Mitigation (한국방재학회 논문집)

Korean Society of Hazard Mitigation (한국방재학회)
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Analysis of Constituents of Insulating Concrete using Micro CT Images

마이크로 CT 이미지를 활용한 단열콘크리트 시편의 성분 분석

  • Received : 2013.01.23
  • Accepted : 2013.03.28
  • Published : 2013.04.30
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Abstract

Concrete is a multi-phase material whose material properties are affected by spatial distributions of phases. The void distribution in concrete strongly affects physical properties of materials, such as mechanical response and heat conduction. To examine constituents of insulating concrete specimens, micro CT(micro computed tomography) image can be effectively used. Using micro CT images, the spatial distribution of constituents in insulating concrete, such as aggregates and glass beads to ensure the dispersed void distribution, can be detected. It is confirmed that micro CT images are effective in describing the spatial distribution of constituents of insulating concrete.

여러 가지 상으로 구성되어 있는 재료인 콘크리트는, 각 구성 성분의 공간적인 분포에 의해 재료의 특성이 큰 영향을 받는다. 특히 공극(void)은 콘크리트의 열전도(heat conduction) 및 강도(strength)와 같은 콘크리트의 물리적 특성에 큰 영향을 주는 요인으로서, 콘크리트 재료의 물성 파악을 위해서 콘크리트에 존재하는 공극의 공간적 분포를 살펴보는 것이 매우 중요하다. 본 연구에서는 단열콘크리트 시편에 존재하는 구성 물질 및 공극 분포를 파악하기 위해서 마이크로 CT(micro computed tomography)를 사용하여 획득한 단면 이미지를 활용하여 단열콘크리트 시편을 관찰하였다. 마이크로 CT 이미지를 통하여, 시편 내 골재 및 공극을 확보하기 위해 포함된 글라스비드(glass bead), 공극 분포 등을 파악할 수 있음을 확인하였고, 이를 통해 수 ${\mu}m$의 크기를 가진 픽셀 이미지를 얻기 위해서, 입자가속기를 이용한 고해상도 CT 이미지를 활용하여, 마이크로 단위의 크기를 가진 입자 등의 단열콘크리트 구성 성분 및 분포 상태를 파악할 수 있음을 확인하였다.

Keywords

Acknowledgement

Supported by : 국토해양부

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