|
|
High volume fly ash concrete
Kučera, Jakub ; Sokol, Pavel (referee) ; Hela, Rudolf (advisor)
Bachelor thesis consist of two parts. The aim of teoretical part is to explore possibilities of usage and properties of high volume fly ash concrete with 40 – 70 % cement replacement. To make an overview of development of strength, durability in various environments, reduction of heat evolution etc. The aim of the experimental part is to compare properties of various class concretes with various amount of fly ash.
|
|
|
The influence of the preparation and editing of test specimens for testing the durability of concrete and concrete products
Šťastný, Antonín ; Brožovský, Jiří (referee) ; Hubáček, Adam (advisor)
This bachelor’s thesis examines the influence of the preparation and editing of test specimens for testing the durability of concrete and concrete products. In particular it monitors the effect of surface treatment and storage of test samples on durability of concrete. The theoretical part describes the mechanism of damage to the samples exposed to salt scaling. It further describes the test methods, which identifies and describes the durability of concrete and concrete products according to the test standards in force in the Czech Republic. Three types of concerete was proposed and mixed in the experimental part of this work. They were using the same raw materials and were differed in degree of aeration. Samples were made from each types of concrete. Thay had different surface treatment, various degrese of saturation before the salt scaling test and the samples were compared with each other.
|
|
|
Special surface finish architectural concrete
Gajdoš, Jan ; Ťažký, Tomáš (referee) ; Hela, Rudolf (advisor)
The aim of this work is to describe modern methods of finishing concrete with architectural division of the surfaces created in fresh and hardened state. In this work describes the various influences and their effects on the resulting surface such as concrete composition, method of storage or production and compaction of concrete. In the practical part of the thesis focuses on the technology of graphic concrete and its application to vertical monolithic wall.
|
|
|
Properties of cementitious composites with plasma treated polymer fibers
Počekajlo, Václav ; Hela, Rudolf (referee) ; Bodnárová, Lenka (advisor)
Modification of polymer fiber low temperature plasma is one of the ways to enhance the properties of modified fibers as follows. This work aims to evaluate the effect of plasma treated polypropylene fibers on the rheological properties of cement composites. The theoretical part describes the treatment and the effect of plasma treatment on polymer fibers. The influence of polypropylene fibers treated by low-temperature plasma on the workability of concrete. The practical part is described and evaluated experimental verification of the influence of the addition of commercially available fibers and fibers treated plasma on the rheological properties of fresh cement composite.
|
|
| |
|
|
Reinforced concrete aeration tank
Vlach, Jakub ; Strnad, Jiří (referee) ; Šulák, Pavel (advisor)
The aim of this work is to design and static analysis features open embedded aeration tank wastewater treatment plants, in particular the assessment base plate and exterior walls. On the basis of reports is prepared drawings consisting of reinforcement drawings and drawing shapes. The proposal was made on the values of the internal forces of the outputs of computer program SCIA Engineer 2012-Student Edition.
|
|
| |
|
|
Prestressed bridge over the river
Kačer, Karel ; Nečas, Radim (referee) ; Koláček, Jan (advisor)
As the thesis I chose static solving bridging the road. This is a real first-class roads situated near the city Kolín in the Central Region. The bridge will be used to transfer traffic across of local Sendražický stream. At the beginning I determined three main variants of supporting design and then I chose one for more detailed processing. It is a armored concrete slab solidified two prestressed ribs arching spanning 18.3 m The calculation is implemented by software Scia Engeneer in accordance to European standards.
|
|
|
The assessment of existing industry hall structure
Hamrlík, Martin ; Chalabala, Jiří (referee) ; Klusáček, Ladislav (advisor)
The bachelor's thesis is focused on an assessment of existing industry hall structure of a rectangular floor plan. The supporting system design consists of a precast reinforced concrete skeleton. The aim of this work is to determine the structure of the expected loading of a new crane runway. The subjects of assesment are columns, girder of crane runway, short corbel and concrete foot. In other part of the project is designed reinforcement nonconforming elements. The work includes the development od structural analysis, drawing of hall structure and reinforcement drawings of reconstructed elements.
|
|
| |
guest ::
