The Journal of Engineering Geology (지질공학)

The Korean Society of Engineering Geology (대한지질공학회)
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Thermal Conductivity of Saturated Unfrozen Kaolinite during Consolidation

포화된 카올리나이트의 압밀에 따른 열전도계수에 관한 연구

  • Kim, Hak-Seung (Geotechnical Engineering & Tunnelling Research Division, Korea Institute of Construction Technology) ;
  • Lee, Jang-Guen (Geotechnical Engineering & Tunnelling Research Division, Korea Institute of Construction Technology) ;
  • Kang, Jae-Mo (Geotechnical Engineering & Tunnelling Research Division, Korea Institute of Construction Technology) ;
  • Kim, Young-Seok (Geotechnical Engineering & Tunnelling Research Division, Korea Institute of Construction Technology) ;
  • Hong, Seung-Seo (Geotechnical Engineering & Tunnelling Research Division, Korea Institute of Construction Technology)
  • 김학승 (한국건설기술연구원 지반연구실) ;
  • 이장근 (한국건설기술연구원 지반연구실) ;
  • 강재모 (한국건설기술연구원 지반연구실) ;
  • 김영석 (한국건설기술연구원 지반연구실) ;
  • 홍승서 (한국건설기술연구원 지반연구실)
  • Received : 2011.05.23
  • Accepted : 2011.06.17
  • Published : 2011.06.30
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Abstract

Experimental tests have been performed to measure the thermal conductivity of unsaturated soils, and computational models have been widely used to predict thermal conductivity. However, measured values of the thermal conductivity of unsaturated soils cannot be compared with predicted values because of the gradient in moisture content within unsaturated soils. In this study, experimental consolidation tests on saturated unfrozen kaolinite were performed to investigate the effect of dry density and moisture content on thermal conductivity. The results were used to evaluate the validity of a model employed to calculate thermal conductivity.

지금까지 열전도계수는 불포화토를 대상으로 측정하였으며 측정결과를 토대로 예측 모델의 신뢰성을 연구해 왔다. 그러나 측정 장치의 발열로 인해 불포화토에서는 함수비 구배가 발생하여 열전도계수 측정에 오차가 발생한다. 본 연구에서는 포화된 점성토의 압밀에 따른 열전도계수를 연속적으로 측정하여 건조밀도와 함수비의 변화에 따른 열전도계수의 관계를 연구하였다. 열전도계수는 니들브로브로 측정하였으며 시료의 교란을 최소화하기 위해 니들브로브를 삽입한 상태에서 압밀실험을 진행하였다. 측정결과는 열전도계수 예측 모델을 이용한 결과와 비교를 통해 예측 모델의 신뢰성을 분석하였다.

Keywords

References

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