Medieval mortars from the Judith Bridge in Prague

Abstract eng:
This article briefly summarises the results of laboratory research on mortars samples from the Judith Bridge, which were taken from its remains at Křižovnické square, Prague during rescue excavations in 2011. Considering the lack of comparative research on mortars of the oldest stone bridge of Prague, this research aimed to characterise, document and mutually compare the samples taken from different constructional elements of the bridge, i.e. the rubble masonry core, the bridge deck and the pavement. Composition of the mortars, their macro and microscopic structure and mechanical properties are discussed. Special attention is paid to the mortar binder as the most important quality factor. The results are compared with the published characteristics of the mortars from similar mediaevel constructions especially from the core of the Charles Bridge.

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