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National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Belt conveyor of crushed stone for concrete mix
 Jílek, Petr ; Pokorný, Přemysl (referee) ; Malášek, Jiří (advisor)
The aim of this bachelor thesis is to design and calculate the construction of a belt conveyor for conveying crushed stone for concrete mix. The conveyor is dimensioned and designed for a conveying height of 3.2 metres, an axial distance of 24 metres and a conveying capacity of 52 000 kilograms per hour. The calculation part is carried out according to ISO 5048. Furthermore, the selection and design of the basic elements such as the tensioning device and the drive are included in the work. Various manufacturers of belt conveyors are mentioned in the research. The drawings for this thesis can be found in the appendix.
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Relationship between petrographic parameters and technological properties of clastic sedimentary rocks used for crushed stone
 Čermák, Martin ; Přikryl, Richard (advisor) ; Krutilová, Kateřina (referee)
This diploma thesis is focused on the finding and describing of the relationships between petrological parameters and technological properties of rocks used for the production of aggregates (crushed stone). Rock specimens were selected from a geological area of Culm (Lower Carboniferous age) in the area of Nízký Jeseník Mts. and Drahanská vrchovina uplands in the Czech Republic. Studied localities were selected on the basis of the current quarrying operations and also to represent the different strata. The six studied localities encompass Kobylí, Chabičov, and Bělkovice where Horní Benešov formation of Nízký Jeseník is exposed. Locality Valšov represents Andělské Hory formation and locality Nová Ves and Loštice represent Protivanov formation of Drahanská vrchovina uplands. Two specimens were taken from the locality Loštice (one from the second cut because there are produced low-grade aggregates and the third cut where high quality crushed stone is produced). A detailed mineralogical-petrographic examination of the samples was the first step, in an attempt to obtain their mineralogical composition and to identify the major rock-forming clasts. Thin sections were examined by standard polarizing microscopy. The auxiliary UV lamp and thin sections saturated by fluorescent substance were used for the...
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