Hochleistungsbeton unter Frost-Tau-Wechselbelastung (English shop)

-Schädigung- und Transportmechanismen-

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This dissertation investigates damage processes and transport mechanisms in high-performance concrete subjected to freeze-thaw cycling. The research focuses on the effects of concrete composition, pore structure, and moisture absorption on freeze-thaw resistance and resistance to de-icing salts. Experimental investigations using CDF and CIF testing methods compare various high-performance concrete mixtures with conventional concrete. Particular attention is given to the influence of cement types, silica fume, fly ash, superplasticizers, air-entraining agents, specimen age, and curing conditions on internal microstructural damage and surface scaling. Additional analyses of pore size distribution and water transport provide insights into different deterioration mechanisms. The findings establish relationships between frost resistance, saturation rate, and pore structure, contributing to the optimization of high-performance concrete durability.