|
|
The issue of new fly ash aerated concrete production
Bednárik, Vít ; Janovský, Radek (referee) ; Drochytka, Rostislav (advisor)
The master´s thesis deals with the possibility of laboratory verification of the influence of feedstock character, especially lime and fly ash, on quality of fly ash aerated concrete. The experimental study involves taking a series of samples autoclaved and non-autoclaved aerated concrete during two pilot plant verification in the factory. After removal of autoclaved and non-autoclaved aerated concrete samples they were tested and compared with results of non-autoclaved aerated concrete produced in the laboratory. Methodology of comparison technologically-produced autoclaved aerated concrete and laboratory-produced non-autoclaved aerated concrete was designed based on achieved findings.
|
|
|
Family house
Fendrich, Lukáš ; Manová, Ludmila (referee) ; Maceková, Věra (advisor)
The content of this thesis is the construction of a detached house in the Moravany village near the city of Brno. This is a house with two floors and a basement. The house is a self-contained housing unit, and is designed for 2 persons (2 children, 2 adults) for long-term accommodation. The main load-bearing walls are made of structural system Ytong and Prefa for underground walls. The non-supported walls in the basement are made of autoclaved aerated concrete, the rest of non-supported walls are made of plasterboard in the floors. The ceilings are made up of Ytong beams and autoclaved aerated concrete inserts, cast-concrete layer, forming reinforced concrete beamed ceiling. The roof is sloped, gabled, created by the construction of timber truss, purlin system.
|
|
|
Detached house with an establishment
Zajícová, Dagmar ; Julinová, Patricie (referee) ; Utíkalová, Ivana (advisor)
This bachelor's thesis deals with designing a project of the family house with the space for the dental surgery. The house is in developing area situated to the south of the centre of village Babice at Uherského Hradiště where there is going to be a housing construction. The object is projected as two-floor with parcial basement detached house for four members of the family. Dental surgery is designed for one dentist and one assistent. In the northwest part there is also a car park with a capacity of three places for patients and one place for disabled people. The main residence are in the southeast and southwest. Constructional system of this house is combined. Supporting system is comprised with blocks of autoclaved aerated concrete. Horizontal construction is made of monolitic reinforced concrete ceiling plate. The object is covered by flat roof. The project was made thanks to computer program AutoCAD 2018 by the company Autodesk. The author of this thesis put emphasis especially on right process layout, architectonic layout, construction requirements and statical requirements.
|
|
|
Possibilities of recycling in the sand aerated concrete technology
Kostura, Patrik ; Kulísek, Karel (referee) ; Drochytka, Rostislav (advisor)
Waste of the aerated concrete is generated directly from the production of aerated concrete or from the constructions. The options for handling aerated concrete are two. We can deal with it as a light aggregate or as a material for the production of aerated concrete. Based on the physico-mechanical properties, the decision was made that aerated concrete is suitable as a light aggregate. The brash as a light aggregate was tested in two variants of the softness (0-2 mm, 0.25-2 mm). Evaluation of the brash as a suitable material for the production of aerated concrete consisted of the creation of laboratory-autoclaved composites. The brash was tested in different ratios (10%, 20%, 30%, 40%), two variants of fineness (0-2 mm, 0-0.25 mm) and two formulations (lime base, fluffy fly ash). Silicon sand was replaced. Based on physico-mechanical properties and microstructural analysis (XRD, SEM), was found that aerated concrete as a material is suitable for 40% sand substitution.
|
|
|
Study of microstructure of autoclaved aerated concrete with using of secondary raw materials
Martanová, Jana ; Suchý, Peter (referee) ; Kulísek, Karel (advisor)
Autoclaved aerated concrete is a used building material, especially for its thermal insulating properties. During autoclaving, an aerated concrete microstructure produces crystalline CSH phases, primarily tobermorite. The ingoing substances are calcium oxide and silica. In addition to commonly used raw materials, secondary raw materials rich in silicon dioxide can be used for production. The use of secondary raw materials gives the opportunity for the construction industry to be more environmentally friendly. Another benefit is the reduction of financial costs. The work explores the influence of individual secondary raw materials on the microstructure. High-temperature fly ash, fluid fly ash, cinder, ground glass and zeolite were used The raw materials were mixed with unalloyed lime at a molar ratio of calcium oxide to silicon dioxide of 0.73 and 1.0. Autoclaving capsules were used to synthesize tobermorite under laboratory conditions. Autoclave was performed at 170 °C and 190 °C with hydrothermal durations of 4, 8 and 16 hours. The most important influence on the microstructure was high-temperature fly ash, on the contrary, the greatest influence on the mechanical properties is attributed to the ground glass.
|
|
|
Family house with an establishment
Hladík, Viktor ; Hnízdilová, Aneta Aya (referee) ; Daněk, Lukáš (advisor)
This bachelor's thesis deals with designing the project of the family house with the space for the dental surgery. The house is in developing area situated to the nort-west of the centre of small town Luka nad Jihlavou where is going to be housing construction. The object is projected as two-floor with parcial basement detached house for four or five members of family. Dental surgery is designed for one dentist and one assistent. Next to house is also the car park with a capacity of three places for patients. The front door is on the ground floor and situtated to the north.. Constructional system of this house is combined. Supporting system is comprised with blocks of autoclaved aerated concrete. Horizontal construction is made up of precast prestressed ceilling panels. The object is covered by flat roof with protected waterproofing membrane of PVC. The project was made thanks to computer program AutoCAD 2016 by the company Autodesk. The author of this thesis put emphasis especially on right process layout, architectonic layout, construction requirements and statical requirements.
|
|
|
Comparison of microstructure of standard and modified fly ash autoclaved aerated concrete
Fleischhacker, Ján ; Kulísek, Karel (referee) ; Drochytka, Rostislav (advisor)
Nowadays, the amount of produced fly ash and fluidized ash is huge, so it is important to find ways of its proper use.Significant influence in field of fly ash consumption is production of autoclaved aerated concrete. Most important factor in production is properties of raw materials such as mineralogical and chemical composition. The study of raw materials is important to understand the mechanism of hydratation, tobermorite formation and mineralogy of final product. In present study, we investigate influence of raw materials to mineralogy of autoclaved aerated concrete, significantly to influence of fluidized ash on quality of autoclaved aerated concrete. Closure of study is design of the methodology, specialized in field of bachelor’s thesis study.
|
|
|
The effect of fly ash aerated concrete production technology to formation of tobermoritic phases
Fleischhacker, Ján ; Kulísek, Karel (referee) ; Drochytka, Rostislav (advisor)
Autoclaved aerated concrete is long-time ecological building material with usefull properties. There needs to be done research of its mineralogical compound for reengineering the production. The main mineral compound of AAC is tobermorite, it increases its mechanical properties. In the presence study, we examine the usage of nature and artificial silicious materials. Also, we investigate the influence of sulfate and alumina admixtures, as well as fluidized bed combustion ash, which can be used as the lime and gypsum replacement. Closure of the study is design of the optimal raw material composition, also hydrothermal treatment of autoclaved aerated concrete. In relation to its mechanical properties, mineralogical composition and cost.
|
|
|
Possibilities of utilizing lightweight autoclaved silicate based materials for insulation of building structures
Novák, Jakub ; Sedlmajer, Martin (referee) ; Zach, Jiří (advisor)
This bachelor´s thesis deals with the issue of thermal insulation for building structures using autoclaved aerated concrete on silicate based with density up to 200 kg/m3. The theoretical part presents the knowledge of the thermal protection of buildings and thermal insulation materials. Thereafter are distributed insulation systems. Production of aerated concrete and its properties is described in detail. In thesis were evaluated possibilities of use this material. The materiál is proved to be suitable for the production of thermal insulating wall, insulated foundation slabs or composite external panels. In the practical part were find out the values of physical and mechanical properties of aerated concrete product. Test results showed that the product can be used as an alternative to standard insulation systems. Component of the practical part was also to compare various insulation materials on the present market. In the conclusion is performed an overall assessment that includes the overall findings and the results.
|
|
|
Utilization of alternative raw materials in sand aerated concrete technology
Ondříčková, Pavlína ; Kulísek, Karel (referee) ; Drochytka, Rostislav (advisor)
The presented work deals with the problems about silica sand replacement for alternative raw materials in the production of autoclaved aerated concrete. The work describes technology of production and creating structures of autoclaved aerated concrete. The main part of the work is the study scientific articles dealing with alternative materials in autoclaved silicate materials. The object of work is to find the most suitable domestic alternative materials for supplement or replacement for silica sand in production of autoclaved aerated concrete.
|
guest ::
