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Stone mastic asphalts with recycled materials - bituminous binders properties
Dzurková, Veronika ; Coufalíková, Iva (referee) ; Hýzl, Petr (advisor)
The bachelor thesis is focused on the issue of adding R-material to stone mastic asphalt mixtures (SMA). The material was obtained from a plant that put the mixture in the test section on the road II/227. The theoretical part describes the problems of recycling of asphalt roads, bituminal binder theory and problems associated with the addition of R-material to hot asphalt mixtures. Bituminal binders from mixtures with different percentages of R-material were extracted in the practical part. Empirical and functional tests were performed on these binders. The aim of the thesis is to determine the influence of the presence of R-material on SMA asphalt mixture in terms of properties of asphalt binder.
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Alternative Aggregate Gradation
Kozáček, Vojtěch ; Koudelka, Tomáš (referee) ; Holcner, Petr (advisor)
The bachelor thesis deals with the design of the gradation curve of the mixture with the smallest gap. The Fuller curve and its origin is described here. A brief description of sphere packing theory is there. The main point of this bachelor’s thesis is a random grain algorithm with which a mixture for practical verification in the laboratory was designed. Next point is a laboratory comparison between a designed mixture and the Fuller parabola.
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Estimating soil effective grain size by EIS apparatus
Chládová, Zuzana ; Novotná, Jitka (referee) ; Pařílková, Jana (advisor)
The bachelor thesis is focused on the use of electrical impedance spectrometry and its possible application in the estimation of effective particle size of soil. The grain size curve of each soil sample was obtained by using the sieve analysis and aerometric method after which the effective particle size for each sample was determined. Thereafter the frequency analyzes of samples were performed under laboratory conditions using Z-meter. The results showed that it is possible to infer effective particle size when the frequency analysis is performed for example during field measurement. This research was carried out as part of the project E!7614 of the EUREKA program.
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Optimization of Working Mass Composition for Dense Silica Bricks Production.
Maňák, Jan ; Lang,, Karel (referee) ; Nevřivová, Lenka (advisor)
A silica bricks is a refractory material which is used mainly in coke industry, glass industry and metallurgy. This material constitute of the quartz modifications. Compact silica is an irreplaceable part of the coke battery and its compactness and robustness is important for quality and long endurance. Very important for large compactness is a grain curve of work matter. This thesis deals with influence of different grain of work matter.
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Study of Pipe Drain Construction
Navrátil, Petr ; Bernatík, Radek (referee) ; Svoboda, Richard (advisor)
Mixing of backfill of the pipe drain construction with sub-ballast layer material through using enclosed drainage systems (mostly by pipe drains) has to be prevented. In order to do so, regulation SŽDC S4 Železniční spodek provides a filtration criterion which needs to be fulfilled or a geotextile with filtration function has to be used. This master thesis verifies if filtration criteria are fulfilled in between different backfilling of the pipe drains and sub-ballast layers in compliance with TNŽ 73 6949. Furthermore a verification of filtration function of different geotextiles including propositions of their suitable placement within construction of the pipe drain system is included.
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Foundations in Volume Unstable Soils
Legut, Dana ; Weiglová, Kamila (referee) ; Hauser,, Jaroslav (referee) ; Zdražil, Karel (referee) ; Vašina,, Josef (referee) ; Paseka, Antonín (advisor)
This dissertation is concerned with the foundations in volume unstable soils and objects disorders which are related to this. The thesis was focused on the study of clay and loess soils which are abundant in the geological profile of the Czech Republic. First, the formation of the two groups of soils is introduced, then their properties are examined and finally the influence of vegetation on the former type and the influence of collapsibility in the latter type are investigated. The conclusion is, in fact, a recommendation on the design of structures so that the system of clay / structure is not damaged and that structures are not subject to renovations. Several instance of problems with structures are discussed which were subject to structural repairs employing both a civil and geotechnical engineers.
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Technology design watertight concrete
Skřivánek, Michal ; Hubertová,, Michala (referee) ; Hela, Rudolf (advisor)
My work describes technology design of pervious concrete. The theoretical part contains a research about this kind of concrete usually from foreign authors. In general, I focused on the composition of the PC, aggregate grading curve, behaviour of concrete in fresh state, storing and compaction of concrete. A critical part is the aggregate grading curve – it plays the main role in the final level of water permeability. Further, we will go through the real world scenarios where we can use this type of concrete and also through the associated drawbacks. A substantial part of this work is about development of water-permeability test. The practical part shows variety of recipes with a list of measured and observed characteristics (compressive strength, frost resistence and water-permeability). The conclusion includes evaluation of the results and suggestions for future development in this area.
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Optimization of aggregate composition with max. grain 22 mm for concretes
Opat, Lubomír ; Vojtek, Miroslav (referee) ; Hela, Rudolf (advisor)
This bachelor thesis deals with the issue of aggregate curve design, proportional representation of the individual separated aggregate sizes in the formula for concrete mixture. It clarifies the origin of aggregate types, from their mother rocks. It describes tests on aggregates, including the test of the shape suitability. In the practical part, there are nine formulas, two of them mixed with the maximum grain size of 16 mm, seven with the grain size of 22 mm. They are instances of fine curves or mixture of coarse curve. Aggregate dust or crushed fine aggregate was also used.
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