Abstract
During the construction of the bridge near Štrba village, concrete was needed to achieve the cube strength of 35N/mm2 after 48hours to allow the prestressing works. However, the question remained how to practically verify the real strength achieved in the structure after such a short time. Whereas the specimens were cured in accordance with valid standards at 20°C in water, it was doubtful whether the real strength of the concrete structure, which is hardening at ambient temperatures around 2°C, corresponds to these measured strengths. It was questionable how to cure the specimens to get as close to the real strengths as possible.
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