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Chemical and mineralogical analysis of a mortar sampled from the well in the yard of the object Sedláčkova 15, Pilsen.
Frankeová, Dita; Bauerová, Pavla; Slížková, Zuzana
2021 - Czech
The mortar sample was analyzed using a TGA and SEM-EDS analysis as part of the construction and technical survey. The mortars' aggregate and binder components were analyzed, and the binder was identified as a mixture of soil and lime. Rozbor vzorků historické malty s využitím skenovacího elektronového mikroskopu (SEM‐EDS) a termické analýzy (TGA) analýzy. Charakterizace plniva a složek pojiva malty. Pojivo malty je nehomogenní, tvoří ho především hlinitokřemičitanová zemina (jíly) a vápno.
Keywords:
mortar; SEM‐EDS; TGA
Available at various institutes of the ASCR
Chemical and mineralogical analysis of a mortar sampled from the well in the yard of the object Sedláčkova 15, Pilsen.
The mortar sample was analyzed using a TGA and SEM-EDS analysis as part of the construction and technical survey. The mortars' aggregate and binder components were analyzed, and the binder was ...
Chemical and microstructural characterization of building materials sampled from Kamenička waterwork
Frankeová, Dita; Bauerová, Pavla; Koudelková, Veronika; Slížková, Zuzana
2021 - 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.\n 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.\n
Keywords:
material characterization; mortars; concrete
Available at various institutes of the ASCR
Chemical and microstructural characterization of building materials sampled from Kamenička 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 ...
Characterization of 'brizolit' plasters from Zlín (CR) based on SEM-EDS microscopic analysis
Bauerová, Pavla; Frankeová, Dita; Slížková, Zuzana
2021 - Czech
Composition of the binder and the aggregate components in “Brizolit” plaster using SEM-EDS method. Plaster was sampled from the building façade in Zlín (CR). Výsledky analýzy složení plniva a pojiva metodou SEM-EDS v omítce zvané brizolit odebrané z fasády domu ve Zlíně.
Keywords:
brizolit; SEM-EDS; historic plaster; Portland cement; lime; mortar characterization
Available at various institutes of the ASCR
Characterization of 'brizolit' plasters from Zlín (CR) based on SEM-EDS microscopic analysis
Composition of the binder and the aggregate components in “Brizolit” plaster using SEM-EDS method. Plaster was sampled from the building façade in Zlín (CR).
Mechanical and fracture mechanical analysis of steel segments cut from Družba oil pipelines DN 500 and DN 700
Gajdoš, Lubomír; Šperl, Martin; Šorm, Filip; Bejdl, Jan
2021 - Czech
Experimental research of mechanical and fracture mechanical properties of the pipe specimens taken from Družba oil pipeline. In addition to basic static tests and fracture toughness tests, the research also included the determination of the kinetic of fatigue crack growth, incl. analysis of critical crack size. Experimentální výzkum mechanických a lomově-mechanických vlastností trubních vzorků z ropovodu Družba. Kromě základních statických zkoušek a zkoušek na určení lomové houževnatosti bylo součástí výzkumu i určení kinetiky růstu únavových trhlin vč. analýzy kritické velikosti trhlin.
Keywords:
J integral; pipeline; toughness; crack
Available at various institutes of the ASCR
Mechanical and fracture mechanical analysis of steel segments cut from Družba oil pipelines DN 500 and DN 700
Experimental research of mechanical and fracture mechanical properties of the pipe specimens taken from Družba oil pipeline. In addition to basic static tests and fracture toughness tests, the ...
Microscopic analysis of the mortar sampled from the fortress 'Stary Dvur', Krupka (CZ)
Bauerová, Pavla; Frankeová, Dita; Slížková, Zuzana
2021 - Czech
Chemical and mineralogical composition of the binder and the aggregate of mortar, using electron microscopy and SEM-EDS analysis Chemické a mineralogické složení pojiva a plniva malty pomocí elektronové mikroskopie a SEM-EDS analýzy
Keywords:
SEM-EDS analysis; historic mortar; hydraulic lime; decalcification; carbonatization
Available at various institutes of the ASCR
Microscopic analysis of the mortar sampled from the fortress 'Stary Dvur', Krupka (CZ)
Chemical and mineralogical composition of the binder and the aggregate of mortar, using electron microscopy and SEM-EDS analysis
A partial report on the structural survey of Judith's Tower in Prague 1
Drdácký, Miloš; Eisler, Marek; Zíma, Pavel
2021 - Czech
For the intended restoration of the object, a survey of structures that show faults or for which knowledge of material characteristics is needed for calculations confirming the reliability of the structures was requested. During the implementation of the order, there were difficulties that affected the necessity of its execution in two stages. The user of the tower cooperated with the authors of this report without any problems, and therefore it was possible to carry out the work listed below in the necessary scope and quality. Pro zamýšlené restaurování objektu byl vyžádán průzkum konstrukcí, které vykazují poruchy nebo u nichž znalost materiálových charakteristik je potřebná pro výpočty, potvrzující spolehlivost konstrukcí. Při realizaci objednávky se vyskytly potíže, které ovlivnily nutnost jejího provedení ve dvou etapách. S autory této zprávy uživatel věže spolupracoval bez problémů a proto bylo možno níže uvedené práce provést v potřebném rozsahu a kvalitě.
Keywords:
historical composite masonry; timber frame diagnostics; non-destructive testing; thermal imaging
Available at various institutes of the ASCR
A partial report on the structural survey of Judith's Tower in Prague 1
For the intended restoration of the object, a survey of structures that show faults or for which knowledge of material characteristics is needed for calculations confirming the reliability of the ...
Monitoring of damage and failures in presentable hall of Fürstenberg Palace, Mala Strana, Prague /4.
Drdácký, Miloš; Zíma, Pavel
2021 - Czech
The report describes and analyses damage and failure of historic structures and relates them to a long term monitoring of movement in cracks and temperature fluctuations. Zpráva popisuje a analyzuje další vývoj poruchy historických konstrukcí a vztahuje je k dlouhodobému monitorování změn teploty a pohybu trhlin.
Keywords:
Fürstenberg Palace; historic structures; damage; cracks
Available at various institutes of the ASCR
Monitoring of damage and failures in presentable hall of Fürstenberg Palace, Mala Strana, Prague /4.
The report describes and analyses damage and failure of historic structures and relates them to a long term monitoring of movement in cracks and temperature fluctuations.
Mechanical and fracture mechanical tests of a special type of steel
Gajdoš, Lubomír; Šperl, Martin; Šorm, Filip
2020 - Czech
Research report on testing of mechanical and fracture mechanical properties of special type of the steel. Between the main results of the research belong fracture toughness in the terms of J integral parameters, constants for crack grows rate in the type of steel used to railway bogies. Výzkumná zpráva popisující zkoušky mechanických a lomových mechanických vlastností speciálního typu oceli. Mezi hlavní výsledky výzkumu patří lomová houževnatost v termínech parametrů J integrálu, konstanty pro popis rychlosti růstu trhlin u typu oceli používané pro železniční podvozky.
Keywords:
steel; J integral; fracture toughness; Ramberg-Osgood´s parameters
Available at various institutes of the ASCR
Mechanical and fracture mechanical tests of a special type of steel
Research report on testing of mechanical and fracture mechanical properties of special type of the steel. Between the main results of the research belong fracture toughness in the terms of J integral ...
Scientific report. Tomography of natural gold findings
Vopálenský, Michal; Kumpová, Ivana
2020 - Czech
The aim of the research was to visualize the distribution of gold in natural findings by means of the computed tomography (CT). Gold is present as an alloy with silver (gold being prevalent at least close to the surface, where X-ray fluorescence is applicable). The findings are not homogenous nugets, but stones where gold is distributed in the parent rock (quartz). The purpose of the CT is to visualize the structure of gold in quartz, localize cavities and other structural features. Účelem výzkumu je výpočetní tomografií(CT) vizualizovat rozložení zlata v přírodních nálezech. Zlato se vyskytuje jako slitina se stříbrem (blízko povrchu, kde je možné měřit rentgenovou fluorescencí, zlato výrazně převládá). Nejedná se přitom o homogenní zlaté valouny, zlato prorůstá mateční horninou (křemenem). Cílem CT je zviditelnit strukturu zlata v křemeni, lokalizovat kavity a případné další strukturální detaily.
Keywords:
X-ray tomography; natural gold; visualization of geological materials
Available at various institutes of the ASCR
Scientific report. Tomography of natural gold findings
The aim of the research was to visualize the distribution of gold in natural findings by means of the computed tomography (CT). Gold is present as an alloy with silver (gold being prevalent at least ...
Chemical and microstructural analyses of the lime plaster sampled from the ceiling of the saloon in chateau Jezeří (CR)
Slížková, Zuzana; Frankeová, Dita; Jurkovská, Lucie
2020 - Czech
Analysis of the plaster layers sampled from the ceiling of the hall at the Jezeří chateau (CR). Using the instrumental methods SEM-EDS, TGA/ DSC and by dissolving the material with HCl acid), the individual components of the material were determined and the composition of the individual layers of the layers was described. The core layer of the plaster is formed by the aggregate mainly based on quartz grains, the secondary component is feldspar. The grain size of the aggregate part is up to 8 mm. The aggregate makes up 69% by weight. The binder of the plaster is hydraulic lime, medium to strongly hydraulic. The top, stucco layer is 5-7 mm thick. The composition is similar to the core layer, only the grain size of the aggregate is smaller - there are grains up to 0.5 mm in size. On the surface of the stucco layer is a lime microlayer (paint) with a thickness of 70 µm. The binder of this surface micro-layer (paint) is the air lime. Analýza vzorku souvrství omítek odebraného ze stropu sálu na zámku v Jezeří. Použitím instrumentálních metod SEM-EDS, TGA/DSC a mokré cesty (rozpuštěním materiálu kyselinou) byly stanoveny jednotlivé složky materiálu a popsáno složení jednotlivých vrstev souvrství. Spodní – jádrová vrstva omítky je tvořena plnivem zejména na bázi zrn křemene, vedlejší složkou jsou živce. Velikost zrn plniva je až do 8 mm. Plnivo tvoří hmotnostně 69%. Pojivem omítky je hydraulické vápno, středně až silně hydraulické. Vrchní, štuková vrstva je silná 5-7 mm. Složení je obdobné spodní jádrové vrstvě, pouze velikost zrn plniva je menší – vyskytují se zrna velikosti do 0,5 mm. Na povrchu štukové vrstvy je vápenná mikrovrstva o tloušťce 70 µm. Pojivem této povrchové mikro-vrstvy je vzdušné vápno.
Keywords:
plaster; chemical composition; mineralogical composition; chateau Jezeří (CR); plaster characterization
Available at various institutes of the ASCR
Chemical and microstructural analyses of the lime plaster sampled from the ceiling of the saloon in chateau Jezeří (CR)
Analysis of the plaster layers sampled from the ceiling of the hall at the Jezeří chateau (CR). Using the instrumental methods SEM-EDS, TGA/ DSC and by dissolving the material with HCl acid), the ...
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