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Chemical and microstructural characterization of building materials sampled from the house No. 86, Nám. 1. máje, Chomutov
Frankeová, Dita; Slížková, Zuzana; Jurkovská, Lucie
2020 - Czech
As part of the construction and technical survey, a microscopic analysis of samples of historic and modern core plaster and stucco was performed using a scanning electron microscope and SEM ‐ EDS analysis. Characterization of the aggregate and binder components of mortars was performed, comparison of mortars from different construction stages. The results of the survey work were used as a basis for the design of the reconstruction of the building. V rámci stavebně-technického průzkumu byl proveden mikroskopický rozbor vzorků historické a moderní jádrové omítky a štuku s využitím skenovacího elektronového mikroskopu a SEM‐EDS analýzy. Byla provedena charakterizace plniva a složek pojiva malt, porovnání malt z různých stavebních etap. Výsledky průzkumných prací byly použity jako podklad pro návrh rekonstrukce objektu.
Keywords:
SEM; microscopic characterization; binders; mortars; stucco
Available at various institutes of the ASCR
Chemical and microstructural characterization of building materials sampled from the house No. 86, Nám. 1. máje, Chomutov
As part of the construction and technical survey, a microscopic analysis of samples of historic and modern core plaster and stucco was performed using a scanning electron microscope and SEM ‐ EDS ...
Chemical and mineralogical analyses of the tile sampled from the fountain in Prague 6, Na Brusce Street
Frankeová, Dita; Slížková, Zuzana; Jurkovská, Lucie; Koudelková, Veronika; Kozlovcev, Petr
2020 - Czech
The study was focused on the identification of the material used for the production of paving in the vicinity of the fountain in Prague 6, Na Brusce Street. Using thermal analysis and electron microscopy, it was found that it is natural limestone. The results of the report were used as a basis for the design of the reconstruction intervention of the object.\n\n \n\n Studie byla zaměřena na identifikaci materiálu použitého na výrobu dlažby v okolí fontány v Praze 6, ulice Na Brusce. Pomocí termické analýzy a elektronové mikroskopie bylo zjištěno, že se jedná o přírodní vápenec. Výsledky zprávy byly použity jako podklad pro návrh rekonstrukce objektu.
Keywords:
thermal analysis; SEM; material characteristics; limestone
Available at various institutes of the ASCR
Chemical and mineralogical analyses of the tile sampled from the fountain in Prague 6, Na Brusce Street
The study was focused on the identification of the material used for the production of paving in the vicinity of the fountain in Prague 6, Na Brusce Street. Using thermal analysis and electron ...
Report on the results of SEM-EDS and IEC analysis of plaster sampled from the interior of the Bethlehem Chapel in Prague
Slížková, Zuzana; Ševčík, Radek; Frankeová, Dita
2020 - Czech
SEM-EDS and IEC analysis of the plaster from the interior of the Bethlehem Chapel in Prague proved a plaster layer consisting of two layers of core plaster with a different structure, a finishing layer and a coating. The plaster is contaminated with nitrates and chlorides, the content of nitrates is very high. SEM-EDS a IEC analýza omítky z interiéru Betlémské kaple v Praze prokázala omítkové souvrství sestávající z dvou vrstev jádrové omítky s odlišnou strukturou, štukové vrstvy a povrchové úpravy (nátěru). Omítka je kontaminovaná dusičnany a chloridy, obsah dusičnanů je velmi vysoký.
Keywords:
plaster; salinity; SEM-EDS analysis; IEC analysis; chemical composition of historic plaster
Available at various institutes of the ASCR
Report on the results of SEM-EDS and IEC analysis of plaster sampled from the interior of the Bethlehem Chapel in Prague
SEM-EDS and IEC analysis of the plaster from the interior of the Bethlehem Chapel in Prague proved a plaster layer consisting of two layers of core plaster with a different structure, a finishing ...
Survey of the constructions hidden under the floor of the Church of the Assumption of the Virgin Mary in Jindřichův Hradec
Válek, Jan; Skružná, Olga; Kozlovcev, Petr
2020 - Czech
The aim of the non-destructive survey was to determine the presence of building constructures hidden under the contemporary floor. The measurement was performed in the chancel area where a tomb was assumed. Cílem nedestruktivního průzkumu bylo zjistit přítomnost stavebních konstrukcí skrytých pod soudobou podlahou. Měření bylo provedeno v prostoru kněžiště v místě předpokládané tumby.
Keywords:
ground penetrating radar (GPR); non-destructive survey; radargrams; cultural heritage
Available at various institutes of the ASCR
Survey of the constructions hidden under the floor of the Church of the Assumption of the Virgin Mary in Jindřichův Hradec
The aim of the non-destructive survey was to determine the presence of building constructures hidden under the contemporary floor. The measurement was performed in the chancel area where a tomb was ...
Characterization of mortars and plasters of pre-Romanesque architecture of Great Moravia
Válek, Jan; Skružná, Olga; Kozlovcev, Petr; Frankeová, Dita; Viani, Alberto
2020 - Czech
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. V dokumentu jsou zpracovány archeologické vzorky z revizních sond v budově Paláce v Mikulčicích. Výsledky obsahují charakterizaci použitých surovin, jejich vstupní poměr a popis za účelem upřesnění jejich provenience.
Keywords:
Great Moravia; archaeological excavation; lime mortars; plasters; cultural heritage
Available at various institutes of the ASCR
Characterization of mortars and plasters of pre-Romanesque architecture of Great Moravia
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 ...
Investigation of fundamental mechanical and fracture mechanical properties of high pressure gas pipeline - location L177 (L177/1 and L177/2)
Gajdoš, Lubomír; Šperl, Martin; Šorm, Filip; Bejdl, Jan
2020 - Czech
Assesment of mechanical and fracture mechanical properties including the analysis of critical crack dimensions for specific gas pressure and pipelines segments. These magnitudes will be used as a reference properties on the subsequent hydrogen effect investigation to the pipeline steel. Hodnocení mechanických a lomově mechanických vlastností vč. analýzy kritických rozměrů trhliny pro dané přepravní tlaky a trubní segmenty. Tyto hodnoty budou použity jako referenční pro následující výzkum vlivu vodíku na potrubní ocel.
Keywords:
fracture toughness; J integral; pipe; steel
Available at various institutes of the ASCR
Investigation of fundamental mechanical and fracture mechanical properties of high pressure gas pipeline - location L177 (L177/1 and L177/2)
Assesment of mechanical and fracture mechanical properties including the analysis of critical crack dimensions for specific gas pressure and pipelines segments. These magnitudes will be used as a ...
Analysis of the porosity of a plaster cast, based on tomography data. Pilot measurement for the feasibility verification of the method for analyses of cast sculptures
Kumpová, Ivana; Vopálenský, Michal
2020 - Czech
The aim of the tomographical research was the verification of the feasibility of the X-ray tomography for the qualitative description of the internal structure of the cast sculptures (damage, former restoration evidence etc.) and also for the characterization of the way and direction of the plaster pouring. There is a hypothesis that in the cast piece, the non-uniform distribution of pores as for the size (volume) along the vertical direction should be observable. The deeper in the piece, the higher amount of smaller pores and lower amount of bigger pores is expected. As well, lower porosity, i.e., ratio of the volume of the pores and the entire investigated volume, is expected deeper in the sample. The distribution of the pores could indicate, how the sculpture was made, in particular, where were the pouring holes and how many, what was the material flux like and how did it mixture. The method was verified on a specimen and the indicated hypotheses were only partly confirmed. Tomografický průzkum byl zaměřen na ověření metody založené na rentgenové tomografii pro kvalitativní popis vnitřní struktury litých soch (poškození, restaurátorské zásahy aj.), ale i pro zjištění způsobu a směru lití sádry/kamene. Existuje hypotéza, že v odlitku by mělo být pozorovatelné nerovnoměrné rozložení pórů co do velikosti (objemu) po jeho výšce. S hloubkou odlitku je očekávána zvyšující se četnost menších pórů a snižující se četnost větších pórů. Obdobně je se zvyšující se hloubkou očekávána nižší hodnota pórovitosti, tj. poměru objemu pórů k objemu vybrané oblasti. Znalost přesného rozložení pórů by tak mohla napovědět, jakým způsobem byla socha vylita, zejména v jaké poloze byla použitá forma při odlévání, kde byly licí otvory a v jakém počtu, jak proudila a mísila se litá hmota. Metoda byla ověřována na zkušebním vzorku a uvedené hypotézy se potvrdily jenom částečně.
Keywords:
X-ray computed tomography; cast sculptures; fine arts
Available at various institutes of the ASCR
Analysis of the porosity of a plaster cast, based on tomography data. Pilot measurement for the feasibility verification of the method for analyses of cast sculptures
The aim of the tomographical research was the verification of the feasibility of the X-ray tomography for the qualitative description of the internal structure of the cast sculptures (damage, former ...
Chemical and microstructural characterization of building materials sampled from Mšeno waterwork
Frankeová, Dita; Jurkovská, Lucie; Slížková, Zuzana
2020 - Czech
Within the construction-technical survey framework, a microscopic analysis of historical concrete samples was performed using a scanning electron microscope and SEM-EDS analysis. Characterization of mortar components, determination of concrete degradation degree, and identification of chemical corrosion products. The results of the survey work were used as a basis for the reconstruction project. V rámci stavebně-technického průzkumu byl proveden mikroskopický rozbor vzorků historického betonu s využitím skenovacího elektronového mikroskopu a SEM‐EDS analýzy. Byla provedena charakterizace plniva a složek pojiva malt, určení stupně degradace betonu a identifikace produktů chemické koroze. Výsledky průzkumných prací byly použity jako podklad pro návrh rekonstrukce objektu.
Keywords:
waterwork; concrete; degradation
Available at various institutes of the ASCR
Chemical and microstructural characterization of building materials sampled from Mšeno waterwork
Within the construction-technical survey framework, a microscopic analysis of historical concrete samples was performed using a scanning electron microscope and SEM-EDS analysis. Characterization of ...
Statics strength test of the steel pin with 65 kN force transducer
Šperl, Martin; Vála, Ondřej; Zíma, Pavel
2020 - Czech
Research report on testing the steel pin which was loading in the three point bending mode. The steel pin was fitted with a 65 kN force sensor and loaded to its strength limit. The pin is used as a safety component for the building lifts. Výzkumná zpráva o testování ocelového čepu, který byl zatěžován v režimu tříbodového ohybu. Ocelový čep byl vybaven senzorem síly 65 kN a byl zatížen až na hranici své pevnosti. Tento čep se používá jako bezpečnostní komponenta pro stavební výtahy.
Keywords:
steel pin; strength; three point bending
Available at various institutes of the ASCR
Statics strength test of the steel pin with 65 kN force transducer
Research report on testing the steel pin which was loading in the three point bending mode. The steel pin was fitted with a 65 kN force sensor and loaded to its strength limit. The pin is used as a ...
Scientific report. Tomography of an archaeological finding – a container with coins
Vopálenský, Michal; Kumpová, Ivana
2020 - Czech
The aim of the research is to visualize an archaeological finding of coins (mostly Ag/Cu alloy) in a ceramic container by means of the computed tomography. The artifact is dated to the first half of the 15th century, the visible coins are Prague Groschen and Vienna Pfennigs. The tomographical model should in an ideal case enable to identify the number and type of the coins and other possible materials. Besides of coins, the finding can contain wood, other organic materials (leather) and soil. The container is approx. 20 cm high, with the maximum diameter of approx. 15 cm. The weight of the artifact is 3.8 kg. Účelem výzkumu je výpočetní tomografií vizualizovat archeologický nález mincí (slitina převážně Ag a Cu) v keramické nádobě. Nález je datován zhruba do 1. pol. 15. stol., viditelné mince jsou pražské groše a vídeňské feniky. Tomografický model by v ideálním případě umožnil popsat počet a druh mincí a identifikovat případné další materiály. Kromě mincí může nález obsahovat dřevo, jiné organické materiály (kůže) a zeminu. Nádoba je zhruba 20 cm vysoká a má v nejširším místě průměr asi 15 cm. Hmotnost nálezu je 3,8 kg.
Keywords:
X-ray tomography; archaeology
Available at various institutes of the ASCR
Scientific report. Tomography of an archaeological finding – a container with coins
The aim of the research is to visualize an archaeological finding of coins (mostly Ag/Cu alloy) in a ceramic container by means of the computed tomography. The artifact is dated to the first half of ...
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