Szukana fraza: [Abstrakt = "Cement concrete in addition to the widespread use in building construction is also the basic material used in engineering constructions. Bridge slabs, bridgeheads, supports and flyovers are exposed to adverse weather conditions, especially corrosive effects of water and frost. Instead of proven solutions – waterproofing concrete mixtures with increased resistance to water are used. Depending on the admixture used, concretes with reduced absorbability, increased frost resistance and compressive strength are obtained. The article presents a comparison of two selected concrete admixtures, whose hydrophobic effect allows the mechanical properties of the finished mixture to be improved."]

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