Institute of Theoretical and Applied Mechanics

Institute of Theoretical and Applied Mechanics 1,319 records found  beginprevious51 - 60nextend  jump to record: Search took 0.00 seconds. 
Chemical and microstructural analysis of asphalt concrete in the former brewery in Plasy (CR)
Frankeová, Dita ; Slížková, Zuzana ; Náhunková, Pavla
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).
Conservation standards for archaeological sites
Drdácký, Miloš ; Drdácký, Tomáš ; Novotný, Jakub ; Přechová, Barbora
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
Appropriate restoration practices to preserve traces of stone working. The use of close-range photogrammetry to evaluate the suitability of restoration procedures
Cihla, Michal ; Frommeltová, E. ; Hodač, J. ; Kovářová, K. ; Pavelka, K. ; Panáček, M. ; Valach, Jaroslav
This preservation procedure is the result of the research project entitled „Building stone surface topography and its application in the field of stone features restoration“ No.DG20P02OVV021, supported by the Ministry of Culture of the Czech Republic. The aim of the preservation procedure was to verify the suitability and applicability of precise measuring methods in order to assess the degree of restoration intervention in the area of traces of stone surface working. The method of close-range photogrammetry was chosen as a tool to evaluate the changes in the topography of stone surfaces bearing traces of working.
Stone surface topography of Prague historic monuments over the centuries
Kovářová, K. ; Cihla, Michal ; Malát, R. ; Semerád, M. ; Tryml, M.
Stonemasons tool traces on stone surface are undoubtably a significant part of monument historic value. As any other profession, stonemasons craft develops over time and has its own specifics in every period. Each work has its own unique pattern and bears traces of individual stonemason workshops, tradition, etc. The study of building stone cutting is based on evolving methods of mechanoscopy and analytical traceology. Stone traceology deals with traces in material and the subsequent reconstruction of tools and the processes of stoneworking. The interpretation of data in terms of determining the actual trace is called a mechanoscopy. When studying a stone surface, the latest 3D modelling technology is used with subsequent analyses by means of Global Mapper software. The use of these methods enables reconstruction of the craftsman’s tools. The presented article is an extract of a study that systematically maps the stone cutting work in the territory of Prague from the oldest buildings to the present day. For example, stonework in 9th century Prague was gradually evolving from simple stone block modelling to sophisticated cutting of blocks in the 12th century. This information can be very useful in the process of monument care.
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
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
Analysis of a 19th century mortar
Bauerová, Pavla ; Frankeová, Dita ; Slížková, Zuzana ; Vondráčková, Michaela
Chemical and mineralogical composition of the binder and the aggregates of the mortar, using SEM-EDS and thermal analysis
Long term monitoring of cracks in masonry of the Fürstenberk Palace in Prague
Drdácký, Miloš ; Zíma, Pavel
Results of long-term monitoring of the behavior of cracks in the masonry of a Baroque palace exposed to the cyclical effects of temperature and humidity. Determining the rate of permanent change in crack width to predict future behavior.
The ruins of a medieval castle and modern technology
Novotný, Jakub
The topic of the paper is the relationship between torsional architecture and modern technologies. First, the Report assessing innovative restoration techniques, technologies and materials used in conservation is briefly presented, which provides an overview of the most used techniques, technologies and materials for the exploration and protection of this type of monuments. Furthermore, the paper provides an overview of the progress and results of the regional cooperation project Technological research of the Štamberk castle ruins in the wider context of the region with an emphasis on the use of modern technologies.
Survey of the terrain and structures under the floor of The Mother of God Church (The Telč Old Town)
Válek, Jan ; Kotková, Kristýna ; Kozlovcev, Petr
A non-destructive survey of the building structures hidden under the current level of the Church of the Mother of God in the Old Town of Telč was carried out using ground-penetrating radar. The survey revealed the occurrence of hidden constructions that are related to the current concept of the church and its construction solution.
Contribution to the investigation of the oldest history of the Telč Castle
Drdácký, Miloš ; Buzek, Jaroslav
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.

Institute of Theoretical and Applied Mechanics : 1,319 records found   beginprevious51 - 60nextend  jump to record:
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