Abstract
Changes of pore structure of cement mortars caused by high temperatures (up to 900 °C) as well as by extremely low temperatures (down to − 170 °C) could be proved by means of mercury porosimetry. While high temperatures lead to an increase of the total volume of pores > 40 A ̊ low temperatures do not. But in both cases a coarsening of the pore structure occurs. The usefulnes of the test method for detecting structural defects caused by a temperature treatment was shown exemplarily by establishing an experimental relation between the pore volume and the residual strength after low temperature cycles.
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