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Monitoring the condition of the archaeological sites of Prague Castle
Válek, Jan; Kozlovcev, Petr; Kotková, Kristýna; Fialová, Anna; Svorová Pawełkowicz, Sylwia; Frankl, Jiří
2023 - Czech
In order to study microclimatic conditions, monitoring of selected archaeological terrains of Prague Castle was carried out in the period from August 2020 to May 2023. The internal climate of the area under the third courtyard of Prague Castle, also called Great Excavations, was monitored in the given time range. During the monitoring campaign, sensors were also placed in the area of the Small Excavations and the archaeological terrain of St. George's Monastery at various times. In particular, relative humidity, air and materials temperatures, moisture content of building materials, etc. were monitored. Samples of building materials were also taken and analysed, and the presence of biological degradation agents was monitored. The research focused in detail on describing the temperature and relative humidity of the indoor environment in relation to the moisture content of the materials and their potential degradation agents. These are primarily represented here by water-soluble salts. Their hazardousness in terms of damage to historic materials is influenced by variations in relative humidity and evaporation of water from capillary pores in combination with temperature. Research has shown that the most significant problem for sites is flooding or water seepage through the ground, surrounding structures or ceiling. Za účelem studia mikroklimatických poměrů proběhl v období od srpna 2020 do května 2023 monitoring vybraných archeologických terénů Pražského hradu. V daném časovém rozsahu bylo sledováno vnitřní klima areálu pod III. nádvořím Pražského hradu, tzv. Velkých vykopávek. Během monitorovací kampaně byly v různých časových obdobích umístěny senzory i do prostoru Malých vykopávek a archeologického terénu kláštera sv. Jiří. Monitorována byla především relativní vlhkost vzduchu, teplota vzduchu i materiálů, vlhkost stavebních materiálů atd., také byly odebrány a analyzovány vzorky stavebních materiálů a monitorován výskyt biologických činitelů. Výzkum se detailně zaměřil na popis teploty a relativní vlhkosti vnitřního prostředí ve vztahu k vlhkosti materiálů a jejich potenciálním degradačním činitelům. Ty zde primárně reprezentují vodorozpustné soli. Jejich nebezpečnost z hlediska poškození historických materiálů je ovlivněna kolísáním relativní vlhkosti a odpařováním vody z kapilárních pórů v kombinaci s teplotou. Výzkum ukázal, že nejzásadnějším problémem je pro areály zatékání, popř. průsak vody skrz terén, okolní konstrukce nebo strop.
Keywords:
longterm monitoring; historic building construction; climate cycles; moisture; cultural heritage; archeological sites of Prague Castle
Available at various institutes of the ASCR
Monitoring the condition of the archaeological sites of Prague Castle
In order to study microclimatic conditions, monitoring of selected archaeological terrains of Prague Castle was carried out in the period from August 2020 to May 2023. The internal climate of the area ...
Chemical and microstructural analysis of asphalt concrete in the former brewery in Plasy (CR)
Frankeová, Dita; Slížková, Zuzana; Náhunková, Pavla
2023 - Czech
TG analysis revealed a proportion of organic matter (asphalt) in the total mass of the material in the amount of 14% by weight and the content of calcium carbonate in the material in the amount of 53% wt. Calcium carbonate is probably in the form of limestone powder as a fine filler. The coarse fraction of the aggregate is represented by stone grains of size 2-10 mm (33% by weight). TG analýzou byl zjištěn podíl organické hmoty (asfaltu) na celkové hmotě materiálu ve výši 14 % hm. a obsah uhličitanu vápenatého v materiálu v množství 53 % hm. Uhličitan vápenatý je pravděpodobně přítomen ve formě vápencového prášku, jako jemného plniva. Hrubou frakci kameniva představují kamenná zrna o velikosti 2-10 mm (33 % hm.).
Keywords:
thermal analysis; asphalt floors; asphalt concrete; tar; asphalt composite
Available at various institutes of the ASCR
Chemical and microstructural analysis of asphalt concrete in the former brewery in Plasy (CR)
TG analysis revealed a proportion of organic matter (asphalt) in the total mass of the material in the amount of 14% by weight and the content of calcium carbonate in the material in the amount of 53% ...
Microscopic analysis of the mortars sampled from the Hradenín fortress
Frankeová, Dita; Bauerová, Pavla; Vondráčková, Michaela; Slížková, Zuzana
2023 - Czech
Two mortar samples and one sample of plaster of the exterior facade from the Gothic fortress Hradenín were examined using an electron microscope. The aim of study was to determine the type of mortar binder and to find out the technological procedure of surface coating application. Pomocí elektronového mikroskopu zkoumány 2 vzorky malty z gotické tvrze Hradenín a jeden vzorek omítky venkovní fasády z téhož objektu. Cílem našeho zkoumání bylo zejména určit druh pojiva malt a pokusit se u vzorku omítky zjistit technologický postup aplikace povrchového nátěru.
Keywords:
mortars; plasters; coatings
Available at various institutes of the ASCR
Microscopic analysis of the mortars sampled from the Hradenín fortress
Two mortar samples and one sample of plaster of the exterior facade from the Gothic fortress Hradenín were examined using an electron microscope. The aim of study was to determine the type of mortar ...
Survey of the Přibyslav underground corridor by ground penetrating radar
Válek, Jan; Kotková, Kristýna; Kozlovcev, Petr
2023 - Czech
A non-destructive survey of the Přibyslav underground corridor using ground penetrating radar was carried out. The aim of the measurement was to verify the existence of possible structures hidden under the current surface of the corridor. The survey located the backfill above the bedrock of the underground corridor and other changes in the structure. Byl realizován nedestruktivní průzkum Přibyslavské štoly pomocí zemního radaru. Cílem měření bylo ověření existence případných prostor skrytých pod současným povrchem štoly. Průzkum lokalizoval násyp nad skalním podložím štoly a další nehomogenity.
Keywords:
ground penetrating radar (GPR); cultural heritage; non-destructive testing
Available at various institutes of the ASCR
Survey of the Přibyslav underground corridor by ground penetrating radar
A non-destructive survey of the Přibyslav underground corridor using ground penetrating radar was carried out. The aim of the measurement was to verify the existence of possible structures hidden ...
Laboratory microscopic survey of the stratigraphy of colored coatings on building materials of the Morzinski Palace building in Nerudova st. Prague 1
Slížková, Zuzana; Náhunková, Pavla; Bauerová, Pavla; Vondráčková, Michaela
2023 - Czech
Stratigraphic analysis of the color coatings on the facade of the Morzín Palace in Prague in order to determine the color of the facade for the future restoration of the building. Stratigrafická analýza barevných nátěrů na fasádě Morzínského paláce v Praze za účelem určení barevnosti fasády pro návrh obnovy a restaurování budovy.
Keywords:
stratigraphy; colored layers; coatings; microscopy
Available at various institutes of the ASCR
Laboratory microscopic survey of the stratigraphy of colored coatings on building materials of the Morzinski Palace building in Nerudova st. Prague 1
Stratigraphic analysis of the color coatings on the facade of the Morzín Palace in Prague in order to determine the color of the facade for the future restoration of the building.
Microscopic analysis of malt samples taken from the objects: tower of the monastery in Sázava, Apolinář in Prague
Bauerová, Pavla; Frankeová, Dita; Vondráčková, Michaela
2023 - Czech
Using an electron microscope and EDS analysis, samples from two locations were examined - a sample of mortar from the tower of the monastery in Sázava and two samples of plaster from the Apolinař building in Prague (Apolinář - face, Apolinář - soil). The aim of the investigation was to determine the type of binder for plasters and coatings on plaster. A strongly hydraulic binder was identified in all three analyzed samples. omocí elektronového mikroskopu a EDS analýzy byly zkoumány vzorky ze dvou lokalit - vzorek malty z věže kláštera v Sázavě a dva vzorky omítky z objektu Apolinář v Praze (Apolinář – líc, Apolinář – půda). Cílem zkoumání bylo zejména určit druh pojiva omítek a nátěrů na omítce. Ve všech třech analyzovaných vzorcích bylo identifikováno silně hydraulické pojivo.
Keywords:
microscopy; EDS analysis; mortars
Available at various institutes of the ASCR
Microscopic analysis of malt samples taken from the objects: tower of the monastery in Sázava, Apolinář in Prague
Using an electron microscope and EDS analysis, samples from two locations were examined - a sample of mortar from the tower of the monastery in Sázava and two samples of plaster from the Apolinař ...
Characterization of five mosaic mortar beds from Austria produced by A. Neuhauser/Tiroler Glasmalerei and J. Pfefferle
Bauerová, Pavla; Frankeová, Dita; Slížková, Zuzana
2023 - English
The report contains the results of material analyses of five mortar beds of mosaics produced by the Austrian studios Neuhauser/Tiroler Glasmalerei and Josef Pfefferle. The analysed samples come from mosaics made at the turn of the 19th and 20th centuries and located in various places in Tyrol. The mortars were analysed by SEM-EDS and thermal analysis. The results showed that, in addition to traditional materials such as marble dust, they also contain atypical or innovative components such as waste ceramic and glass shards or early Portland cement.
Keywords:
SEM-EDS analysis; historic mortar; mosaic; thermal analysis
Available at various institutes of the ASCR
Characterization of five mosaic mortar beds from Austria produced by A. Neuhauser/Tiroler Glasmalerei and J. Pfefferle
The report contains the results of material analyses of five mortar beds of mosaics produced by the Austrian studios Neuhauser/Tiroler Glasmalerei and Josef Pfefferle. The analysed samples come from ...
Investigation of basic mechanical and fracture-mechanical properties of specimens cut from high pressure gas pipeline – locality L177/2 after a fourteen months exposition to moist hydrogen at the pressure 3 MPa
Gajdoš, Lubomír; Šperl, Martin; Šorm, Filip; Bejdl, Jan
2022 - Czech
Investigation of the effect of moist hydrogen pressurized to 3 MPa on mechanical and fracture properties of gas pipeline steel ČSN 13126, tensile specimens, Charpy specimens and CT specimens were kept loaded during the exposition in moist hydrogen, after a fourteen months exposition it was found that ductility of tensile specimens and fracture parameters Jin and J0,2 of CT specimens decreased whilst the parameter Jm was slightly increased.\n Vyšetření vlivu vlhkého vodíku stlačeného na tlak 3 MPa na mechanické a lomové vlastnosti plynovodní oceli ČSN 13126, tahové vzorky, Charpy vzorky i CT vzorky byly během expozice ve vlhkém vodíku trvale zatíženy, po čtrnácti měsících expozice byl zjištěn pokles tažnosti tahových vzorků, pokles lomových parametrů Jin a J0,2 a mírné zvýšení parametru Jm.
Keywords:
stress-strain diagram; Ramberg-Osgood dependence; impact strength; fracture toughness
Available at various institutes of the ASCR
Investigation of basic mechanical and fracture-mechanical properties of specimens cut from high pressure gas pipeline – locality L177/2 after a fourteen months exposition to moist hydrogen at the pressure 3 MPa
Investigation of the effect of moist hydrogen pressurized to 3 MPa on mechanical and fracture properties of gas pipeline steel ČSN 13126, tensile specimens, Charpy specimens and CT specimens were kept ...
Contribution to the investigation of the oldest history of the Telč Castle
Drdácký, Miloš; Buzek, Jaroslav
2022 - Czech
The summary research report presents the results of research into the oldest building relics of Telč Castle. It uses radiocarbon dating of skeletal remains, non-destructive surveying by thermal imaging and ground-penetrating radar, and 3D photogrammetric reconstructions of the shape and dimensions of architectural elements. It also analyzes Templar traces in Telč region and in the wider region. Souhrnná výzkumná zpráva předkládá výsledky výzkumu nejstarších stavebních reliktů telčského zámku. Využívá radiouhlíkového datování kosterních pozůstatků, nedestruktivního průzkumu termovizí a georadarem a 3D fotogrammetrických rekonstrukcí tvaru a rozměrů architektonických prvků. Analyzuje i templářské stopy na Telčsku a v širším regionu.
Keywords:
historic architecture; Templars; archaeological survey; ground penetrating radar (GPR); age analysis of bones; 3D documentation
Available at various institutes of the ASCR
Contribution to the investigation of the oldest history of the Telč Castle
The summary research report presents the results of research into the oldest building relics of Telč Castle. It uses radiocarbon dating of skeletal remains, non-destructive surveying by thermal ...
Conservation standards for archaeological sites
Drdácký, Miloš; Drdácký, Tomáš; Novotný, Jakub; Přechová, Barbora
2022 - English
The report provides a set of principles for the preventive protection, conservation and management of archaeological sites exposed to the threats of global hazards, especially natural disasters and long-term weather effects.\n\n
Keywords:
conservation; archaeological sites; Danube limes monument; natural hazards; preventive measures
Available at various institutes of the ASCR
Conservation standards for archaeological sites
The report provides a set of principles for the preventive protection, conservation and management of archaeological sites exposed to the threats of global hazards, especially natural disasters and ...
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