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Effect of aggregate type on lime mortar rheology
Vozák, Rastislav ; Rovnaník, Pavel (referee) ; Vyšvařil, Martin (advisor)
The subject of this bachelor thesis is examining the effect of aggregate type on lime mortar rheology. In the theoretical part, the thesis describes types of liquids and basic rheological quantities. Afterwards there are described some of the rheological behaviour models of non-Newtonian fluids. Furthermore, the theoretical part characterizes measurement of the flow, devices used for the measurement including the oscillatory measurement and its individual modes. Scientific literature was used to describe the rheology of the lime mortars and it covers the effect of different additives on the rheological behaviour. There is also characterized the effect of aggregate on the properties of lime mortars. The experimental part talks about the effect of three various kinds of aggregate on rheological prop-erties of the fresh lime mortar. The chemical composition of aggregates and their granulometry was determined. Subsequently, flow measurements were carried out and evaluated into flow curves. The yield stress, coefficient of consistency and flow index were assayed. In the oscillatory measurement there were measured complex, elastic and viscous modulus and loss factor.
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Survey and Diagnostics of Reinforced Concrete Structure
Haloun, Jan ; Heřmánková, Věra (referee) ; Anton, Ondřej (advisor)
The first part of this diploma thesis is about late and current methods used in Engineering surveys. The theoretical part is focused on description of individual testing methods and their evaluation based on relevant standarts. Detailed description of diagnostic methods is dependent on methods used in a practical part. The practical part is focused on defining of material characteristics of used materials and way of reinforcing of reinforced concrete elements. Based on those defined pieces of information the static recalculation of girder and pile was made.
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Belt conveyor for crushed aggregate
Kohoutek, Martin ; Kašpárek, Jaroslav (referee) ; Jonák, Martin (advisor)
In this bachelor thesis is to implement the structural design of the conveyor belt for transporting of crushed aggregate of the granularity specified transport capacity 70000 kg/ h and entering the transport height of 7 m. In this paper briefly describes the main portion of the belt conveyor further functional calculations performed according to valid standards CSN ISO 5048, design of basic dimensions, drive, tensioning devices and stress analysis of selected parts of the conveyor belt. The work is accompanied by the required drawings.
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Belt conveyor for transport of aggregates
Smola, Jiří ; Malášek, Jiří (referee) ; Pokorný, Přemysl (advisor)
The aim of this bachelor thesis is to design belt conveyor for aggregates on distance 40 m and on vertical distance 8 m. This thesis contain short description individual parts of belt conveyor, functional calculation and determination of main dimensions carried out according to ISO 5048. This thesis contain drawing of set and drawing of steel construction
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Influence of environmental conditions on the modulus of elasticity of concrete
Peřina, Tomáš ; Novosad, Petr (referee) ; Křížová, Klára (advisor)
Increasingly, the modulus of elasticity of concrete is at the forefront of interest. In the past, it has been neglected to some reason and not taken into due consideration. The theoretical part of the bachelor thesis is to study of factors influencing the static modulus of elasticity in compression. The practical part is focused on monitoring the modulus of elasticity of concrete, based on the different type of the environment stored test specimens. Concrete will be stored outdoor in the water and in the laboratory environment conditions. Designed concrete mixes will be primarily different with the used of type of admixtures but also with type of cement. The result values will be compared on the dependence of environmental conditions of the test specimens.
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The screw conveyor of aggregate
Tocháček, Jakub ; Pokorný, Přemysl (referee) ; Kašpárek, Jaroslav (advisor)
This bachelor thesis deals with the conceptual design of horizontal screw conveyor for transportation of aggregate. The work consists of technical report and drawings. Technical report contains the calculation of main dimensions, selection of the drive, clutch and bearings, including stress analysis of functional parts. The drawings, which are based on model assembly processed in 3D CAD system, contains a drawing of the entire device, sub-assemblies of bearing seats and welding subassembly of trough.
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Design of asphalt concrete mixture and determinantion of the resistance against permanent deformation
Němec, Jan ; Matoušek, David (referee) ; Varaus, Michal (advisor)
This bachelor thesis deals with the problem regarding asphalt concrete mixtures, concretely ACO 11+. This type of mixture has low resistance to permanent deformation (rutting) while high temperatures are present. The binder and aggregate tests regarding physical and mechanical properties were carried out. Subsequently the new mixture was designed on the basis of stricter requirement for grading envelope and air void content. The design mixture was tested for resistance to permanent deformation. From the obtained results the change in the national annex of the standard ČSN EN 13108-1 is considered in terms of change in testing temperature for some kinds of binders. The same tests were conducted in others asphalt laboratories in the Czech Republic to ensure the maximum comparability.
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