Betony s odolností proti vysokým teplotám

Abstract

This thesis studies high temperature resistant cocretes. It deals particularly with thein types, uses and norms according to which the heat resistancy of concretes and of fire resistant concretes is evaluated. The theoretical part describes the materials used for high temperature resistant conceretes, this boxing agents, additives and various fibres. The practical part analyze stests performed on a fresh mixture and subsequently also on the hardened concrete according to the directives in force in the Czech Republic. Two concrete mixtures were designed, differing in aggregate and cement used in the mixture. Test samples were fired at temperatures: 200 °C, 400 °C, 600°C, 900 °C, 1 100 °C and 1 200 °C. From each recipe, reference samples were created. After firing, each of the samples were tested for compressive strength and subsequently compared and evaluated.