This thesis discusses the mechanical and physical properties of cement composites. We were interested in their suitability for use in outdoor fireplaces as lining. We prepared four different cementitious composite mixtures, from which we created samples in the form of prism. The mixtures differed from each other in the components used. While the water to cement ratio remained the same in all mixtures, the mixtures were different combinations of Portland cement, dolomitic aggregate, expanded clay and aluminate cement. Initially, measurements of slump, bulk density and porosity were performed on the fresh mixtures. In order to compare the mechanical and physical properties at room and elevated temperatures, after 28 days, measurements of compressive and tensile strength at room and at 200 °C, were performed. Additionally, we tested the frost resistance of the cementitious composites.
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