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The determination of material characteristics of natural and artificial stone samples from Marian Column at Hradčany Square in Prague
Slížková, Zuzana ; Zeman, Antonín ; Petráňová, Veronika ; Viani, Alberto ; Pérez-Estébanez, Marta ; Frankeová, Dita ; Ševčík, Radek ; Mácová, Petra ; Janotová, Dana ; Hasníková, Hana ; Niedoba, Krzysztof ; Hauková, Petra
Within the survey before restoration intervention material properties of natural and artificial stones that are part of the Marian Column at Hradcany Square in Prague were determined. 15 samples were subjected to extensive instrumental analysis, whose output is not only chemical and mineralogical composition of the samples, but also the degree of degradation including a description of the porous system and the level of salinity.
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Characterisation of historic materials - the case of Tao-I-Kisra Palace (Iraq)
Slížková, Zuzana ; Pérez-Estébanez, Marta ; Viani, Alberto
The aim of this study is the characterization of bricks from the Taq-I-Kisra palace in southern Iraq (ancient Mesopotamian area). The palace is located in the plain of the Tigri river (see Fig. 1). The construction probably started around year 540 AD even if there is some uncertainty about its age. The arched hall on the facade is about 37 m high and is the largest vault ever constructed at the time (see Fig. 2). Originally conceived as an imperial palace, was later used as a mosque by the Arabs before being gradually abandoned. The historical constructions in this area are what remains of the capital of the empire. In accordance with geological data, in the area where the temple was built (and in general in the Mesopotamian area), the most available construction material was mud. Mud bricks were made mainly of clays. In ancient times there is evidence of mixes with sand, water, mud, and organic material, husks or straw.
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A survey of the mortuary in Ostrovec at Velečín
Slížková, Zuzana ; Frankeová, Dita ; Petráňová, Veronika ; Zeman, Antonín ; Hauková, Petra ; Mácová, Petra ; Niedoba, Krzysztof ; Viani, Alberto ; Pérez-Estébanez, Marta ; Zíma, Pavel ; Janotová, Dana
This report presents the results of a survey of the mortuary object in Ostrovec by Velečín which has been selected for testing the samples of plaster developed in the project MK NAKI DF11P01OVV008 (High-performance and compatible lime mortars for extreme application in restoration, repair and preventive maintenance of architectural heritage). The survey focuses on the plinth of the morgue, where the plaster repeatedly freezes and falls off after one winter season. Causes of failure of the repairs plasters and material composition of were examined by following techniques:x-ray diffraction (XRD), thermal analysis (TG), optic and electron microscopy, FTIR and Raman spectroscopy.
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