ABSTRACT
The device for determining the thermal properties of geo-materials consists of a thermostat cell equipped with temperature sensors. The heat flow through rock mass is of great importance in the utilisation of geothermal energy as well as in the assessment of the thermal environment in radioactive waste disposal. Thermal properties such as specific heat, heating or cooling coefficient and thermal conductivity are important to assess the heat transport through solids. The heat production of the concrete mix was measured and used as input data. A series of experiments on heat generation rate of cement, which was a rapid-hardening type, and thermo-mechanical properties of concrete and rock were undertaken. The experimental and calculated results furthermore indicated that the temperature distribution of the concrete lining remained the freezing temperature for about 5 days which was a sufficient period of time for the completion of the hydration period of the concrete.
