National Repository of Grey Literature 30 records found  1 - 10nextend  jump to record: Search took 0.00 seconds. 
Material composition of paving in the Pilgrimage Church of St John of Nepomuk at Zelena Hora
Válek, Jan ; Skružná, Olga ; Kozlovcev, Petr ; Viani, Alberto ; Frankeová, Dita ; Shaikh, Nigar
The aim of the study was to verify the material composition of the paving and to evaluate the possible production of replicas. The sampled material was analyzed by using optical microscopy, X-ray diffraction, X-ray fluorescence and thermal analyses. The results showed that the studied paving is of ceramic origin and its composition corresponds to burnt brick clays of local raw materials.
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Characterization of injection material Ledan TA1 for the needs of the preservation of the architectural fragment located under the 3rd courtyard of Prague Castle
Slížková, Zuzana ; Viani, Alberto ; Frankeová, Dita ; Mácová, Petra ; Ševčík, Radek ; Fabeš, Roman
For the purpose of restoring a Romanesque fragment of marl nearby the Old Royal palace, a material survey of the LEDAN TA1 product was carried out. The study aimed to assess the compatibility of this preservative material with historic marl masonry.
Survey of salinity of masonry under III. courtyard at Prague Castle
Slížková, Zuzana ; Ševčík, Radek ; Viani, Alberto ; Mácová, Petra
Archaeological architectural monuments in the area under III. in the courtyard of Prague Castle were monitored in 2021 in terms of the extent of salt efflorescences and their chemical composition. Salt efflorescence on the marlstone walls of the church of St. Bartholomew contain sodium carbonate and bicarbonate, sodium sulfate and calcium sulfate. Sodium nitrate and potassium nitrate were also present in some samples. The aim of the research is to propose measures to mitigate the effect of salts on the degradation of historic masonry.
Ceiling plaster in the Church of Master Jan Hus in Česká Lípa. Plaster in the Stauss system
Válek, Jan ; Skružná, Olga ; Kozlovcev, Petr ; Slížková, Zuzana ; Frankeová, Dita ; Kotková, Kristýna ; Viani, Alberto
The studied ceiling plasters were sampled the Mistr Jan Hus Church in Česká Lípa. The material consisted of several layers of paint. The aim of this research was to characterize the individual layers of plaster in the Stauss system.
Characterization of stone and mortar sampled from Romanesque architectural fragment in archeological site under Prague Castle (CZ)
Slížková, Zuzana ; Frankeová, Dita ; Bauerová, Pavla ; Viani, Alberto ; Kozlovcev, Petr ; Svoboda, Milan
Material characterization of silicite stone and bending earth-lime mortar sampled from the archeological site below the 3rd courtyard of Prague Castle provides data on the chemical and mineralogical composition and microstructure of stone and mortar for the needs of the historic structure conservation.
Characterization of mortars and plasters of pre-Romanesque architecture of Great Moravia
Válek, Jan ; Skružná, Olga ; Kozlovcev, Petr ; Frankeová, Dita ; Viani, Alberto
The document contains archaeological samples from excavation in the building of the Palace in Mikulčice. The results include the characterization of used raw materials, their input ratio and a their description in order to specify their provenance.
Chemical and mineralogical analyses of the stucco marble „scagliola“ sampled from a decoration part of the historic cabinet placed in the chateau Konopiště (CR).
Slížková, Zuzana ; Mácová, Petra ; Viani, Alberto ; Frankeová, Dita ; Jurkovská, Lucie ; Kozlovcev, Petr
Chemical and mineralogical analyses results focused on the composition of the stucco marble „scagliola“. The material was sampled from a decoration part of the historic cabinet placed in the chateau Konopiště (CR).
Quantification of microstructural changes in limestone cement paste stored in sulfate environment at low temperature
Sotiriadis, Konstantinos ; Hlobil, Michal ; Machová, Dita ; Mácová, Petra ; Viani, Alberto ; Vopálenský, Michal
Samples of cement paste based on mixed cement with limestone admixture were stored in a magnesium sulfate solution for 6 months at 5 ° C to monitor the development of sulfate corrosion and its effect on microstructure. The extent of corrosion was evaluated by several different techniques. The paste samples were scanned at monthly intervals by X-ray tomography for non-destructive quantification of the pore structure and extent of damage, along with a description of the phase changes in the microstructure using X-ray diffraction and infrared spectroscopy. Compressive strength testing confirmed the effect of corrosion on the mechanical resistance of the samples. The results show a rapid course of degradation propagating in an irregular band, caused primarily by the formation of expandable sulfur-based corrosion products, the consequent crack formation and loss of internal cohesion of the material. The occurrence of both ettringite and thaumasite and gypsum was confirmed in the damaged parts.
Chemical and microstructural characterization of the render, sampled from the Garden wall of the US Embassy in Prague 1
Slížková, Zuzana ; Frankeová, Dita ; Viani, Alberto ; Hauková, Petra ; Koudelková, Veronika ; Svoboda, Milan
The aim of the work was to analyze the mortar taken from the Garden wall (US Embassy, Prague 1). Analyzes were performed for the binder and filler characterization and the sample was also dissolved in HCl to determine the mixing ratio.
Chemical and microstructural characterization of the render, sampled from Gloriette, the US Embassy in Prague 1
Slížková, Zuzana ; Frankeová, Dita ; Viani, Alberto ; Hauková, Petra ; Koudelková, Veronika ; Svoboda, Milan
The aim of the work was to analyze the mortar taken from the Gloriette (US Embassy, Prague 1). Analyzes were performed for the binder and filler characterization and the sample was also dissolved in HCl to determine the mixing ratio.

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