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CLSM을 이용한 동결/융해 실험 후 화강암 시료의 표면 및 물성변화 분석

CLSM Analysis of Change in Roughness and Physical Properties of Granite after Freeze-Thaw Experiments

  • 정종택 (한국지질자원연구원 지구환경연구본부) ;
  • 최정해 (한국지질자원연구원 지구환경연구본부) ;
  • 채병곤 (한국지질자원연구원 지구환경연구본부) ;
  • 장보안 (강원대학교 지구물리학과)
  • Jeong, Jongtaek (Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Choi, Junghae (Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Chae, Byung-Gon (Geologic Environment Division, Korea Institute of Geoscience and Mineral Resources) ;
  • Jang, Bo-An (Department of Geophysics, Kangwon National University)
  • 투고 : 2013.08.23
  • 심사 : 2013.09.13
  • 발행 : 2013.09.30

초록

본 연구에서는 임기광산과 일광광산의 시료를 활용하여 동결/융해 실험을 진행하고 시료의 물성변화 및 표면 거칠기의 변화를 관찰하여 풍화양상을 분석하였다. 본 연구에서 사용된 동결/융해 실험의 온도 범위는 우리나라의 여름과 겨울철의 온도를 고려하여 $-20^{\circ}C$ ~ $+40^{\circ}C$로 설정하고 각각 설정한 온도까지 도달하는데 각 1시간, 목표온도를 유지하는데 1시간으로 총 4시간을 1 주기(cycle)로 하여 매 20 주기마다 풍화양상을 관찰하였다. 그 결과 동결/융해 시험의 반복횟수가 증가하면서 시료의 측정된 물성 값 중 공극률(porosity)은 두 개의 지역에서 0.05%와 0.15%의 차이를 보이며 증가하였고, 입자의 부피와 건조질량, 포화질량은 비교적 미세하게 감소하는 경향을 보였다. 또한, 다초점 레이저 스캔 현미경을 통해서는 측정한 선 거칠기와 면 거칠기 인자의 값들은 시간이 경과함에 있어 일정하게 증가 및 감소하는 경향을 보였으며, 다초점 레이저 스캔 현미경을 통해 촬영한 사진에서도 표면 거칠기가 변하는 것을 확인할 수 있었다.

Freeze-thaw experiments were conducted to evaluate changes in surface roughness and physical properties in samples of granite from Ilgwang and Imki mines, Korea. The temperature range in the experiments was $-20^{\circ}C$ to $40^{\circ}C$, based on typical summer and winter temperatures in Korea, and the surface was observed every 20 cycles. One cycle comprised 1 hour of heating or cooling of the samples and 1 hour during which the target temperature was maintained. With increasing repetitions of the freeze-thaw experiment, porosity increased by 0.05%-0.15% in the two samples and the dry weight increased, whereas the volume of the soil and saturation weight decreased. Observations by confocal laser scanning microscope (CLSM) revealed that line and surface roughness parameters showed a tendency to increase and decrease, respectively, with elapsed time. Changes in surface roughness were apparent on the CLSM images.

키워드

참고문헌

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피인용 문헌

  1. Variation of Physical and Microstructural Properties of Limestone caused by Artificial Freezing and Thawing vol.25, pp.5, 2015, https://doi.org/10.7474/TUS.2015.25.5.435