Temperature and moisture dependent thermophysical properties of Sander sandstone

•A state of the art transient hot-bridge sensor is used for the measurements.•Thermal conductivity of moist sandstone has been determined experimentally.•Dependence of the thermal conductivity of the stone on the thermal conductivity of the moist air is given.

Temperature dependent thermophysical properties of Sander sandstone are presented in dry and saturated states over a temperature range of −20 °C–40 °C. Water and ethanol are used as saturating fluids. Anomalous changes in thermophysical properties due to the formation of ice during freezing–thawing cycles are directly compared with the unfrozen ethanol-saturated state at the same temperatures. In addition, the thermal conductivity of Sander sandstone in different moist states over the humidity range of 10%–90% is determined at 25 °C. The moisture transport in Sander sandstone is discussed in terms of the sorption curve. The porosity and density measurements on Sander sandstone are done according to the American Society of Testing and Materials (ASTM) standards at ambient conditions. Furthermore, surface and internal pore structures are analyzed by using scanning electron microscopy (SEM). All experimental results are obtained by using a state-of-the-art transient hot-bridge sensor.