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Verification of ECPC and EPCC concepts for the use of the k-value of selected active admixtures with mixed cement
Prudil, Matěj ; Slánský,, Bohuslav (referee) ; Hela, Rudolf (advisor)
This bachelor thesis deals with the verification of the replacement of blended cement, latent hydraulic and pozzolanic additions used in the production of concrete. In the theoretical part of this thesis, the use of blended cements in concrete production is firstly described and the effect of additions on the properties of fresh and hardened concrete is briefly discussed. The next chapters focus on fly ash and blast furnace slag as Type II additions and their basic properties. The theoretical part also focuses exclusively on the concepts used to replace cement with active additions. These concepts are successively presented in this thesis as: K-value concept, Equivalent concrete performance concept (ECPC) and Equivalent performance of combinations concept (EPCC). In the experimental part, the properties of the test mortars with cement replacement by concrete active additions (slag from Kotouč Štramberk and high temperature fly ash from Opatovice and Chvaletice) are compared. The above mentioned concepts for the replacement of cement with active additions are evaluated in the experimental part from the economic point of view (prices per m3 of concrete) and ecological point of view (calculation of carbon footprint in t CO2 per m3 of concrete production). In order to compare these benefits, a concrete mix of strength class C30/37 is proposed according to each concept. From the knowledge gained in the development of the ECPC and EPCC concepts, a q-value concept is proposed in the experimental part. In the last chapter of the experimental part, the resulting values of this work are compared with the experimental work already carried out to replace Portland cement with identical active admixtures.
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Composite materials based on alcali activated blast furnace slag with admixture of fly ash
Indra, Ivo ; Brandštetr, Jiří (referee) ; Opravil, Tomáš (advisor)
This thesis concerns on substitution of blast furnace slag or its part with fly ash in alkali-activated systems based on aluminosilikates. Classic, fluid bottom and fluid filter fly ashes will be tested. The goal is to prepare geopolymer with required mechanical properties, but with maximal admixture of alternative raw materials. In composites with substitutioned slag or its part the thesis focuses mainly on workabilityof fresh mixture, pressure and bending strenght. Use of secondary raw materials has advantages in the economic point of view and it´s friendly to enviroment, too.
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Pipe screw conveyor for fly ash transport
Žaloudek, Vilém ; Zeizinger, Lukáš (referee) ; Škopán, Miroslav (advisor)
This bachelor's thesis deals with design and constructional solution of oblique tubular screw conveyor for transportation of power plant ash from silo to further technological processing. In this thesis evaluation of fundamental dimensions, design of power unit, design of bearings, evaluation of filling of the through and strength control of selected components of screw conveyor is done. This thesis consists of evaluation report and drawing documentation.
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Continual helicoidal mixer
Pelka, Tomáš ; Malach, František (referee) ; Malášek, Jiří (advisor)
This diploma project works out and is focused on the continual mixing process of the particular matters. The project is divided into following chapters. Chapter 1 includes mixing theory and information of the experimental work of the particular matters for blade using. In chapter 2 there is Evaluation and calculation of the technical parameters for the mixer. Chapter 3 deals with the engine proposal and chapter 4 includes calculation and design work of the gear transmission. Chapter 5 includes the stress analysis of the shaft and blade with the I-deas software. In attachment there are also the mixer arrangement drawing and detailed drawings of the key parts and groups for the mixer.
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Pipe screw conveyor for fly ash transport
Žaloudek, Vilém ; Zeizinger, Lukáš (referee) ; Škopán, Miroslav (advisor)
This bachelor's thesis deals with design and constructional solution of oblique tubular screw conveyor for transportation of power plant ash from silo to further technological processing. In this thesis evaluation of fundamental dimensions, design of power unit, design of bearings, evaluation of filling of the through and strength control of selected components of screw conveyor is done. This thesis consists of evaluation report and drawing documentation.
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Continual helicoidal mixer
Pelka, Tomáš ; Malach, František (referee) ; Malášek, Jiří (advisor)
This diploma project works out and is focused on the continual mixing process of the particular matters. The project is divided into following chapters. Chapter 1 includes mixing theory and information of the experimental work of the particular matters for blade using. In chapter 2 there is Evaluation and calculation of the technical parameters for the mixer. Chapter 3 deals with the engine proposal and chapter 4 includes calculation and design work of the gear transmission. Chapter 5 includes the stress analysis of the shaft and blade with the I-deas software. In attachment there are also the mixer arrangement drawing and detailed drawings of the key parts and groups for the mixer.
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Composite materials based on alcali activated blast furnace slag with admixture of fly ash
Indra, Ivo ; Brandštetr, Jiří (referee) ; Opravil, Tomáš (advisor)
This thesis concerns on substitution of blast furnace slag or its part with fly ash in alkali-activated systems based on aluminosilikates. Classic, fluid bottom and fluid filter fly ashes will be tested. The goal is to prepare geopolymer with required mechanical properties, but with maximal admixture of alternative raw materials. In composites with substitutioned slag or its part the thesis focuses mainly on workabilityof fresh mixture, pressure and bending strenght. Use of secondary raw materials has advantages in the economic point of view and it´s friendly to enviroment, too.
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