Measurement of Thermal Expansion Coefficient of Rock using Strain Gauge

스트레인 게이지를 이용한 암석의 열팽창계수 측정

  • 박찬 (한국지질자원연구원 지반안전연구부) ;
  • 김형목 (한국지질자원연구원 지반안전연구부) ;
  • 신중호 (한국지질자원연구원 지반안전연구부) ;
  • 박연준 (수원대학교 토목공학과) ;
  • 천대성 (한국지질자원연구원 지반안전연구부)
  • Published : 2007.12.31


With increasing demand for LNG as energy resources and need for $CO_2$ sequestration as greenhouse gas, more storage facilities are required in Korea. Due to the recent acute safety concerns and land shortage, storage facilities tend to be located underground. In design and construction of underground storage for low and high temperature materials, besides their mechanical characteristics, the thermal characteristics of rock under temperature variation should be understood. In this study, laboratory experiments for the measurement of the thermal expansion coefficient of rock were performed using strain gauge in consideration of the particle size of mineral and experiment temperature range. Experiment results show that thermal expansion coefficient decreased as the temperature decreases. In addition, linear thermal expansion coefficient was developed for typical Korean rocks such as granite. The results of this study can be utilized for the evaluation of thermal propagation in rock mass and the thermo-mechanical stability of underground facilities.


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