National Repository of Grey Literature 23 records found  previous11 - 20next  jump to record: Search took 0.01 seconds. 
Crystallization force of sodium chloride
Koudelková, Veronika ; Wolf, Benjamin
Soluble salts are one of the most deteriorating factor causing damage of historical building materials due to generation of crystallization pressure inside pore space. Direct measurement of crystallization force is quite challenging, hence we developed at our institute a novel device able to detect the force of growing crystal. The device is based on the monitoring of force developed with upper microscopic glass on the growing crystal to maintain constant position. The crystal could generate force because of the existence of thin liquid layer of solution between both surfaces come into contact. The driving force for the subsequent growth of crystal against obstacle is supersaturation, which is mainly induced by evaporation of the salt solution. In this experiment, the crystal of sodium chloride generated force 16.8 mN and the corresponding crystallization pressure was equal to the value 0.48 MPa.
Grid indentation and statistic deconvolution: limitations and accuracy
Hrbek, V. ; Koudelková, Veronika
The evaluation of heterogeneous materials used in civil engineering on the microscopic level has become important aspect in proper understanding of the macroscopic behavior of the material. This contribution aims at advantages and problems related to the technique of grid indentation and at the evaluation of mechanical properties.
Chemical and mineralogical analyses of plaster samples from State Castle Bečov
Slížková, Zuzana ; Koudelková, Veronika ; Kozlovcev, Petr ; Šterner, Adam
Using chemical and microscopic analysis, it was determined that the analyzed sample of bedding mortar from the 13th century (Czech castle Bečov) is the air lime mortar with the quartz and silicate sand enriched by some content of slag grains. The internal plaster from the same building period of the castle was made using the lime-earthen mortar with predominantly silicate sand. The plaster contained an admixture of wood or plant particles, sawdust has been identified.\n\n
Chemical and microscopic analysis of the repair mortar, Petschek villa, V sadech 2, Prague 6
Slížková, Zuzana ; Koudelková, Veronika ; Frankeová, Dita ; Šterner, Adam
The aim of this work was to analyze the repair mortar from Petschek villa, by means of SEM-EDX analysis in order to characterize the aggregate and the binder in the mortar sample. The analyses proved the cement mortar covered with lime-cement mortar.
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.
Chemical and microscopic analysis of external plaster, Petschek villa, V sadech 2, Prague 6
Slížková, Zuzana ; Viani, Alberto ; Koudelková, Veronika ; Frankeová, Dita ; Hauková, Petra
The aim of this work was to analyze mortar from Petschek villa, XRD and SEM-EDX analyzes have been proposed, which results in the characterization of aggregate and mortar binders. The analyses proved gypsum plaster with surface paint.
Microscopic analyses of sgraffito sampled from house façade in Brno, Venhudova street, CR
Slížková, Zuzana ; Kozlovcev, Petr ; Koudelková, Veronika ; Novák, Vladimír
Report presents results of microscopic characterization of sgraffito from the the fifties of the twentieth century sampled from house façade in Brno, Venhudova street, CR. Light (optical) microscopy and electron microscopy SEM-EDS were used for characterization of the aggregate and the binder of two layers of sgraffito.
Characterization of historical plasters sampled from town house in Cheb, CR
Slížková, Zuzana ; Koudelková, Veronika ; Frankeová, Dita
Report presents results of material characterization of historic plasters from townhouse in Cheb, CR. Thermal and SEM-EDS analyses were used to characterize the aggregate, the binder and painting layers on two samples of plasters.
Material characterization of historical roofing slate tiles and assessment of the state regarding the planned building reconstruction.
Drdácký, Miloš ; Slížková, Zuzana ; Frankeová, Dita ; Hasníková, Hana ; Hauková, Petra ; Koudelková, Veronika ; Kozlovcev, Petr ; Valach, Jaroslav ; Wolf, Benjamin
The report includes the results of the study focusing on the material properties of historical roofing slate tiles and assessment of the state regarding the planned building reconstruction.

National Repository of Grey Literature : 23 records found   previous11 - 20next  jump to record:
See also: similar author names
4 KOUDELKOVÁ, Veronika
10 Koudelková, Věra
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