Thermophysical Analysis of Sandstone by Pulse Transient Method

Stones belong to porous materials where water in pores plays an important role during the freeze-thaw process. A thermophysical analysis based on the pulse transient method has been used to study an ageing cycle, namely the freeze-thaw cycle. Thermophysical analysis is based on measuring the thermophysical properties under specific thermodynamic conditions. The transient method determines the specific heat, thermal diffusivity, and thermal conductivity by a single measurement. A specimen of Sander sandstone was analyzed in both dry and water-saturated states. Typical anomalies of all thermophysical parameters at the freeze-thaw point as well as differences for the dry and saturated states were found. The changes of thermophysical parameters measured when using freeze-thaw cycles correspond to stone ageing. The freeze-thaw cycle can often be encountered in building physics, concrete construction, etc.