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Granites of Prague stone arch bridges in 19th c.: sources, properties, and weathering
Rauvolfová, Hana ; Přikryl, Richard (advisor) ; Krutilová, Kateřina (referee)
This thesis deals with the topic of the degradation of granite masonry, which was used for the construction of two stone arch bridges in Prague. Granite is used as a popular building material for its high durability however it is still necessary to check the condition of the masonry, especially in cities where stone is subject to different degradation process than stone in nature is exposed to. The first chapter is devoted to description of granite from a petrographic point of view, its physical and chemical properties and the important properties that makes it a popular building stone. Furthermore, the classification of granitic rocks and important quarries in Czech Republic is described here. The next chapter is dedicated to the description of the degradation process that negatively affect the rock. Degradation processes are divided into three categories: physical, chemical and biodegradation. Degradation processes are described here in general, but the results of tests performed when measuring degradation on granite historical buildings from abroad are also presented here. The last part of this thesis is dedicated to stone arch bridges, their most common faults and repair methods. They focus more on the two Prague bridges from the 19th century, the Legií bridge and the Palacký bridge, for the...
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Methods of provenance determination of marbles
Dontová, Kateřina ; Přikryl, Richard (advisor) ; Kuchařová, Aneta (referee)
Determination of provenance of marble from sculptures or architecture, which make part of our cultural heritage, make some of the principal goals of material investigation of artefact and/or archaeological findings. Light-coloured marbles used in antiquity are amongst the most studied types of natural stone. Various methods and approaches, employed for marble provenance, rank to the most developer. Moreover, antique marbles take advantage of having the largest datasets for provenance determination. This bachelor thesis focuses on the review of the main scientific methods which have been used for marble provenance studies during past 130 years. Mineralogical-petrographic description together with thin-section microscopy makes the basis of such studies. Traditional qualitative description has evolved into more precise quantitative study with the help of computer-based image analysis methods allowing for obtaining sound quantitative data (grains size, grain shape etc.). After-2WW period is characterised by adoption of various analytical methods, which employ different chemical characteristics of marbles. Along with trace elements studies (e.g. by INAA, LA-IC-MS), most of the recently used analytical methods focus on the C and O stable isotopes. Each of the methods has also some limitations, therefore...
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