Influence of type of additive on the residual compressive strength of hardened cement paste subjected to high temperatures

An experimental study was carried out to test the residual compressive strength of hardened cement paste specimens with various types of additives subjected to high temperatures. After the temperature loading the number and size of the cracks and the residual compressive strength were determined in addition to thermo-analytic analyses. Following conclusions were drawn: number and size of surface cracks as well as loss of compressive strength due to temperature loading decreased by using slag. Limestone additive did not seem to be preferable from the point of view of high temperatures.