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The river dam Slapy - evaluation of material and mechanical properties of the steel quick-closing panels
Šperl, Martin; Gajdoš, Lubomír; Bejdl, Jan
2021 - Czech
An experimental research of the material and mechanical properties of two steel segments cut from quick-closing gate was carried out for suitability assessment to operation. The quick-closing gate is a technology part of the river dam Slapy. Byl uskutečněn experimentální výzkum materiálových a mechanických vlastností dodaných dvou ocelových segmentů vyřezaných z rychlozávěrových vrat VD Slapy pro posouzení způsobilosti k provozu.
Keywords:
steel gate; tensile strength; notch toughness; metallography
Available at various institutes of the ASCR
The river dam Slapy - evaluation of material and mechanical properties of the steel quick-closing panels
An experimental research of the material and mechanical properties of two steel segments cut from quick-closing gate was carried out for suitability assessment to operation. The quick-closing gate is ...
GPR survey of the reinforcement above the long horizontal window case study: Ice ring stadium restaurant Fuchs on Štvanice Island
Válek, Jan; Kozlovcev, Petr; Eisler, Marek; Dušek, Ondřej
2021 - English
The aim of the survey was to assess the use of Ground Penetration Radar for the reinforcement position detection on the Ice ring restaurant – an early concrete building on Štvanice Island in Prague from 1932. For this case study a potentially critical section of a façade above the app. 16 m long horizontal window was selected. GPR from IDS company equipped with 2 GHz high frequency antenna was used.
Keywords:
Fuchs restaurant; GPR; reinforced concrete
Available at various institutes of the ASCR
GPR survey of the reinforcement above the long horizontal window case study: Ice ring stadium restaurant Fuchs on Štvanice Island
The aim of the survey was to assess the use of Ground Penetration Radar for the reinforcement position detection on the Ice ring restaurant – an early concrete building on Štvanice Island in Prague ...
Evaluation of mechanical properties of the steel materials take from the electric transmission towers damaged by tornado
Šperl, Martin; Gajdoš, Lubomír; Bejdl, Jan
2021 - Czech
The report deals with the evaluation of mechanical properties of steels from high voltage masts destroyed by tornado. Práce se zabývá hodnocením mechanických vlastností ocelí stožárů vysokého napětí zničených důsledkem tornáda.
Keywords:
tensile strength; steel; notch toughness; ductility
Available at various institutes of the ASCR
Evaluation of mechanical properties of the steel materials take from the electric transmission towers damaged by tornado
The report deals with the evaluation of mechanical properties of steels from high voltage masts destroyed by tornado.
Survey of salinity of masonry under III. courtyard at Prague Castle
Slížková, Zuzana; Ševčík, Radek; Viani, Alberto; Mácová, Petra
2021 - Czech
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. Archeologické stavební památky v prostoru pod III. nádvořím Pražského hradu byly v roce 2021 monitorovány z hlediska rozsahu výkvětů solí a jejich chemického složení. Výkvěty solí na opukové zdi kostela zvaného sv. Bartoloměj obsahují uhličitan a hydrogenuhličitan sodný, síran sodný a síran vápenatý. Místy byl přítomen též dusičnan sodný a dusičnan draselný. Cílem výzkumu je návrh opatření pro zmírnění účinku solí na degradaci historické zdiva.
Keywords:
salinity of masonry; historical stone masonry; XRD analysis; IEC analysis; archeological terrain; crust; salt efflorescence
Available at various institutes of the ASCR
Survey of salinity of masonry under III. courtyard at Prague Castle
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. ...
Microscopic characterization of mortar samples from Vinohrady Railway Tunnels
Bauerová, Pavla; Frankeová, Dita; 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 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 a identifikace produktů chemické koroze. Výsledky průzkumných prací byly použity jako podklad pro návrh rekonstrukce objektu.\n
Keywords:
Portland cement; tunnel; degradation
Available at various institutes of the ASCR
Microscopic characterization of mortar samples from Vinohrady Railway Tunnels
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 ...
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
2021 - Czech
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. Vzorky pochází z omítky stropní konstrukce kostela Mistra Jana Husa v České Lípě. Omítka se skládá z několika vrstev a nátěrů. Cílem průzkumu je charakterizovat vrstvy tvořící základ omítkového souvrství, které bylo použito ve spojení se stropním systém Stauss.
Keywords:
ceiling plaster; material composition; plaster characterization; Stauss system; Mistr Jan Hus Church Česká Lípa
Available at various institutes of the ASCR
Ceiling plaster in the Church of Master Jan Hus in Česká Lípa. Plaster in the Stauss system
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 ...
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 ...
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