Issued topics of Doctoral Study Program:|
Geopolymers are inorganic silicate binders with high durability and serviceability. The aim of this work will be preparation of various types of artificial stone with geopolymer matrix and characterization of their properties.
"Effect of fine brick body as the admixtures in lime
mortars and plasters will be tested. Thesis will be
focused on the process of the formation of compact
structure, microstructure, porosity, and other
properties of hardened mortars."
A reduction of CO2 emissions during the cement and concrete production can be accomplished using silicate admixtures. The aim of the thesis is to investigate the properties of a mix binder based on the p-cement and natural zeolites.
"The theme will be the development of innovative types of cement matrix materials intended for application in specific conditions. Acting will be, for example, those intended for torkretáž, concrete with extreme durability in aggressive environments, etc."
"The goal is to create conditions for the detection of single parameters of building materials using nondestructive testing methods. Preference will be test-rebound hardness testing method, ultrasonic impulse method and resonance method"
"The objectives of the work is the study and creation of conditions for identifying modules of elasticity of various building materials, new types of concrete, repair materials, brick body, etc. Determine the relationship between the dynamic modules of NDT and static modules of elasticity"
Influence of the type of surface modification of polypropylene fibers (PP) on the final properties of cementitous composites with PP fibers. Study of rheological and physico-mechanical properties of composites with PP fibers with low-temperature plasma surface modification and lubrication chemical agents.
Modifications of production and properties of sulphate binders to improve their morphology and physico-chemical poperties after hydration.
"Tetrahedral configuration presumes the potential substitution of sulphate anions for silicate anions in the major clinker minerals of Portland clincer, especially belite."
"Nowadays, nanotechnology is commonly used in mechanical engineering or electrotechnical industry. However, this trend is new for building industry. Research focusing on possibilities of use of carbon nano-tubes modifying mictrostructure of dense cement based concrete has been launched. The thesis will focus on testing of this material with the aim of fundamental enhancement of physico-mechanical properties of cement based composite materials. "
"Granulometric curves of fillers for design of dense concrete matrix are known for more than 80 years. However, no major research has been published concerning fine parts below 0.25 mm and their influence on ideal granulometric curve and achievement of minimal porosity with the aim of reduction of binders in concrete. The thesis will focus on influence of fine parts on density and related properties of hardened concrete."
Description of mechanism of anorthite crystallization in the two different systems (plastic and non-plastic with utilization of aluminous cements as a binder). The influence of different CaO source on the Anorthite formation.
Effect of contemporary lightweigting agents on the firing process of brick body. Definition of temperature ranges of their burning during the firing in the tunnel kiln.
"The work is focused on the use of organic fillers in silicate matrices, verification of mutual interaction, and the possibility of improving mechanical characteristics and durability of materials with silicate binder and an organic filler"
"Idea of the work is based on working out of basic principles of searching for and finding risks and defining procedures for their evaluating and solving, with model application in a real reinforced concrete structure, and predicting their lifespan"
Doctor work will be focused to study of behavior of silicate materials from point of view of heat and moisture transfer in their structure and verify the possibility of their utilization for insulating and sanitation of buildings. Under the doctor theses will be design of thermal insulating plasters with utilization for insulating and sanitation of buildings done and additionally will be study of possibility of modification of thermal technical and moisture behavior of these materials with capillary active additives.
"Doctor theses will be focused on development of advanced natural acoustic-thermal insulation boards usable mainly in building industry and on study of their physical, thermal insulation, acoustic and mechanical properties. In terms of doctor theses will made design and development of insulation boards based on easy renewable fibers (hemp, flax, reed-mace, coconut and wood) bounded with polymer BiCo fibers or natural PLA based fibers. During the work will be possibility of utilization for fire retarders based on nanotechnologies verified."
"The utilization of industrial wastes especially from energetic sources, as secondary raw materials, represents a long-standing ecological problem. Possibilities of these wastes broader applications, are searched out and evaluated, especially in the frame of the building industry. Simultaneously the theoretical and application sources are processed in the scope of the problem solution as special base for environmental and economical studies. The subject of the work is supported by parallel solution of scientific projects, in the Institute of Building Materials and Elements."
Topic of doctoral thesis is development and modification of polymer protection of building structures – specialized coating. Aim of the development of above mentioned material is to obtain coating suitable for use under hydro insulation asphalt felt. Task of the thesis will be description of failures in nowadays layers and development of material with resistance to high temperature due to application technology and long durability. Important part of the thesis will be exploitation of analytic special methods for failures of hydro insulation systems on bridges.
"During their hydration period silicate binders cause bulk changes, generating internal tension stresses. Thus, the hydration period is crucial for the whole lifetime of the structure."
"Many building materials, due to their inner pore structure, are influenced by various processes, including moisture. The special attention is paid to the study and formulation of conditions generating the non-force load on materials."
The interaction by thermal radiation between the outer surface of thermal insulation and upper layers of atmosphere implicates additional decrease of temperature with surface condensation. The topics cover the study of such phenomenon and the development of appropriate mortars.
"The research of methods of upgrading waste materials forin thermal insulations, including the use of vegetable fibres, is a contribution for sustainable development in civil engineering. Benefits are good utility properties in comparison with traditional insulations."
Processes of thermal flow in building structures can be composition of material layers can be modified by the composition of material layers. The analysis of internal thermal and moisture processes and effective design of a structure is able to affect its energy demand substantially.
The thermal comfort of environment is driven by the thermal exchange between particular surfaces of a structure. The aim of the experimental part of this work is to analyze all thermal aspects in the formulation of limit conditions involving thermal radiation.
"The dissertation will be dealt with possible variants of each type of input ashes of binding components and to improve the properties of porous concrete, as well as study of the overall production of aerated concrete technology."
"Dissertation will address the development of material in gel consistency when using infusion orifice. These include facilitating applications, minimizing material consumption and a possible higher concentration of active ingredients. All this should allow the horizontal application of active substances, to apply it in the holes smaller than is currently common. Gel consistency while preventing undesirable discharge of the substance to any imperfections in the walls. In the event that confirmed the assumption of the possibility of using secondary raw materials, would also benefit the economic and ecological."
"Applying non-destructive testing methods of impedance spectroscopy in material engineering, focusing on materials based on cement. Using impedance spectroscopy to study the developing microstructure of cement based materials during hydration."
"The aim is a fast NDT of concrete and reinforced concrete elementes strain with increased temperature bei using methods as Ipact-echo, acoustic emission and nonlinear ultrasound spectroscopy. The results will be compared to conventional methods."
The aim of study will be monitoring concrete along hardening. Acoustic emission method will aplied prefereably.