| Abstract [eng] |
The aim of the master’s thesis is to investigate the influence of ground glass on the mechanical and physical properties of concrete and its resistance to frost effects, with the aim of reducing CO₂ emissions. The thesis consists of four parts: literature analysis, materials used in the research, experimental methods, and their results. The literature analysis part describes the chemical compositions of glass and Portland cement, as well as the properties of ground glass in concrete mixtures. The cement hydration processes are examined, and the possibilities of pozzolanic reactions using active mineral additives and the risks of alkali-silica reaction are reviewed. Cases of how to activate pozzolanic reactions and how to control or avoid alkali-silica reaction are analyzed. The influence of ground glass on the freeze–thaw cycles of concrete and the practical application of concrete containing ground glass are also reviewed. The part on materials used in the research presents the materials used in the experiments. The experimental methods section describes the methods applied for testing the specimens. The experimental results section describes the specific process of ground glass production and determines the specific surface area of ground glass particles. The cement hydration process using ground glass and silica fume was determined by the semi-adiabatic calorimetry method. The physical and mechanical properties of the new compositions, such as concrete mixture spread, density, flexural and compressive strength, are determined, and shrinkage deformation results are presented when performing an accelerated alkali-silica reaction test, as well as the resistance to salt-scaling of concrete is determined by the one-sided freezing and thawing method. The environmental impact of the new compositions was evaluated by calculating CO₂ emissions and comparing them with the standard concrete composition. |
