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National Projects
National
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| Program: | VEGA |
| Responsible solver: | doc. Ing. Čekon Miroslav, PhD. |
| Duration: | – |
| Understanding and improvement of the hydration reactions of the low-carbon cements for development of low-carbon concrete including carbon capture through carbonation | |
| Pochopenie a zlepšenie hydratačných reakcií nízkouhlíkových cementov pre vývoj nízkouhlíkového betónu vrátane zachytávania uhlíka karbonatáciou | |
| Program: | APVV |
| Responsible solver: | Prof. Dr. Ing. Palou Martin-Tchingnabé |
| Annotation: | Deepening the knowledge and understanding of the mechanisms and kinetics of hydration reactions of cement composites with a low to very low content of Portland clinker to develop Low-Carbon Concrete is currently the main focus of scientific research on inorganic composite binders worldwide. The construction sector has been identified as the most significant sector responsible for 40% of total anthropogenic CO2. To mitigate the detrimental effect of cement and concrete production on the environment and energy consumption, locally available supplemental cementitious materials (SCMs) are combined with locally produced cement. The chemical composition of these materials is closely linked to their source, causing the cement composition to vary from one locality to another. The hydration reaction of cement, which governs the properties of concrete, is a complex process, even more so in the system containing SCMs. Lowering the clinker content in cement to achieve low-carbon cement decreases the initial hydration heat, slows the rate of strength development, and makes the concrete belong to a low-strength class. Primary hydration of cement phases, alkali-activated/pozzolanic reactions, carbonation, superplasticizers, and the water-binder ratio are the main factors to consider in developing low-carbon cement, the main ingredient for making low-carbon concrete. Developing low-carbon concrete from low-carbon cement with the incorporation of recycled concrete aggregates is the main scientific and technological challenge to achieve the objectives of this project. Combining scientific knowledge of hydration process with the development of low-carbon cement will enable the development of low-carbon concrete with similar properties to ordinary concrete. Furthermore, the project plans to develop fiber-reinforced load-bearing concrete from low-carbon concrete. The possibility of sequestering CO2 in the concrete structure by carbonation in the CO2 chamber will be explored. |
| Duration: | 1.7.2024 – 30.6.2028 |
| Hydration processes and microstructure formation of the new cement composites and their use in the development of special concretes | |
| Hydratačný proces a tvorba mikroštruktúry nových kompozitných cementov a ich použitie na vývoj špeciálnych betónov | |
| Program: | VEGA |
| Responsible solver: | Prof. Dr. Ing. Palou Martin-Tchingnabé |
| Annotation: | The European Committee for Standardization CEN-51 expanded the number of cement types from 27 to 39. Two newly developed types of cement, (1) – Portland composite cement CEM II/C-M and (2) composite cement – CEM VI, covered by STN EN 197-5, are not yet recognized and fully accepted by the standard STN 206/NA for concrete. These composite cements with a lower clinker factor (65-35%) and a higher degree of admixture combinations are of considerable CO2 reduction potential in cement and concrete industries. The suitability of these new types of cement and their intended use for construction purposes was experimentally evaluated by test programs for mortars. Until now, detailed studies on the suitability of these binders for the development of concrete, i.e., for what types of concrete and for what exposure classes related to environmental actions, have not been carried out and scientifically verified. The project fulfills the gap between STN EN 197-5 for mortar and STN 206/NA for concrete by using material chemistry to map the potential application of the new composites cement in developing sealing cement grout for geothermal wells, Self-Compacting and Heavyweight Concrete. |
| Duration: | 1.1.2024 – 31.12.2027 |
| Complexity on latent heat storage materials and systems in applications for sustainable and green construction | |
| Komplexnosť v aplikáciách latentných tepelnoakumulačných materiálov a systémov pre udržateľnú a ekologickú výstavbu | |
| Program: | VEGA |
| Responsible solver: | doc. Ing. Čekon Miroslav, PhD. |
| Annotation: | Driven by adverse effects of climate change, progressive building envelope solutions are needed for storing thermal energy in periods of abundance and releasing it when and where needed, such as responsive envelope elements. By virtue of their large latent heat of fusion, phase change materials (PCMs) are promising materials to address this need. However, many challenges remain concerning their real implementation, cost and sustainability. Modern building envelope systems together with the integration of advanced materials that can passively operate with thermal energy obtained from its environment, represent current direction of innovative research. Therefore, this research aims to manufacture and integrate green and sustainable composite materials and systems in combination with PCMs, focusing on bio-based PCMs from renewable and eco-based sources. Waste products such as food wastes, by-products from agro-based food industries, genetically modified oils and many others are potentials for present research. |
| Duration: | 1.1.2024 – 31.12.2027 |
| Multiphysical effects in micro/nano structural elements in MEMS/NEMS devices | |
| Multifyzikálne efekty v mikro/nano-konštrukčných prvkoch MEMS/NEMS zariadení | |
| Program: | VEGA |
| Responsible solver: | Ing. Sátor Ladislav, PhD. |
| Annotation: | The global aim of this project is to give a unified theoretical and numerical treatment of the micro/nano plateand/or beam bending in interactions with various physical fields. Besides the classical theory of plates/beams(CLT), we shall consider also the first and third order shear deformation theories (FSDT and TSDT). Moreover,we allow the materials of the plates to be functionally graded (FGM) both in transversal and in-plane directions,hence the governing equations are partial differential equations with variable coefficients. We intend to developadvanced numerical techniques, like the Moving Finite Element Method (MFEM) to solve the rather complexboundary value problems. The numerical simulation of the effects of functional dependence of materialcoefficients in multifield coupling and analyse the size-dependent effects can lead to deeper understanding ofphysical processes in response of micro/nano structural plate/beamlike elements. |
| Duration: | 1.1.2024 – 31.12.2027 |
| OCCVVP – Optical characterization of particles in exteriors and interiors | |
| Optická charakterizácia častíc vo vonkajšom a vnútornom prostredí | |
| Program: | VEGA |
| Responsible solver: | Mgr. Kocifaj Miroslav, DrSc. |
| Annotation: | Small size particles can easily penetrate different environments and have a detrimental effect on human health on both the interior and exterior. In addition to their negative impacts on the health of the population, micrometer-sized particles determine the distribution of diffuse daylight as well as its availability indoors. Environmental turbidity is a critical factor for predicting the amount of solar energy (photovoltaic, PV). Currently, most models assume that particles are spherical in shape, and this limitation is expected to have minimal impact on the accuracy of model predictions. However, such models suffer from a systematic bias, as the particles in urban environments are neither spherical nor spheroidal, and their varying shapes contribute to amplitude fluctuations of direct and diffuse radiation components. The goal of the project is to determine the effect of particle shape on detected radiation and to develop optical methods for characterizing particles in their natural environment. |
| Duration: | 1.1.2024 – 31.12.2027 |
| LIGHT-POLLUTION- – Comprehensive model of light pollution propagation into the ambient environment | |
| Komplexný model šírenia svetelného znečistenia do okolitého prostredia | |
| Program: | APVV |
| Responsible solver: | Mgr. Kocifaj Miroslav, DrSc. |
| Annotation: | The proliferation of outdoor artificial light at night is a global challenge that relates strongly to cities. The brightening of the night sky due to the phenomenon of skyglow touches on many social concerns from urban ecology to human health, energy security, and sustainability and climate change. Knowledge of the hemispherical night sky brightness (NSB) produced by ongoing expansion of outdoor lighting systems is a necessary step for characterizing the nighttime environment and monitoring the evolution of night sky quality. We intend to develop a comprehensive NSB model applicable for any site worldwide, while respecting the atmospheric conditions prevailing at the respective locality. By achieving an excellent match between theory and experiment, the model will (1) accurately assess the environmental impact of new outdoor lighting installations; (2) investigate the relationship between light pollution and other forms of environmental pollution; (3) elucidate how the nature of anthropogenic particles in the atmosphere relates to the formation of skyglow over cities; (4) predict how much light at night reaches the ground in and near cities; and (5) determine the value of specific outdoor lighting modernization efforts in reducing light pollution. Our strategy to develop a comprehensive model is to derive governing equations in analytic forms in order to provide a deep physical insight to the problem solved, interpret of the role of each parameter, discover dependencies otherwise hidden or unknown, and construct theoretically well-founded approximations. We will solve the vector radiative transfer equation in the Earth’s atmosphere, while determining Stokes parameters for arbitrary cloud coverage or light emissions from artificial sources. Through a combination of radiative transfer modeling and experimental validation, we deliver novel NSB mitigation strategies. |
| Duration: | 1.7.2023 – 30.6.2027 |
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| Štúdium vplyvu fyzikálno-mechanických faktorov recyklovaného kameniva na vlastnosti kompozitov konštrukčných betónov s maximalizáciou zníženia dopadu na životné prostredie | |
| Program: | DoktoGrant |
| Responsible solver: | Ing. Czirák Peter |
| Duration: | 1.1.2025 – 31.12.2025 |
| MEMOLIPO – Measuring and Modelling Light Pollution | |
| Meranie and modelovanie svetelného znečistenia | |
| Program: | SASPRO |
| Responsible solver: | Dr. Wallner Stefan, BSc MSc |
| Annotation: | This project aims to investigate various approaches in measuring and modelling of theglobal phenomenon of light pollution, artificial light at night which is misdirected, overilluminatedand/or makes use of harmful light. The ever-worsening phenomenon impairsnot only the visibility of objects on the night sky, furthermore it is a major threat for allorganisms worldwide, including human health suffering from impacts. Research goals ofMEMOLIPO include a greater understanding of atmospheric impacts on the night skybrightness and how currently used measurement devices can show new approaches in theirapplication. Firstly, light monitoring network data underly strong seasonal variations whichcan potentially falsify long-term analyses of light pollution development. Such must beincluded in order to rightly give statements about increases or decreases in night skybrightness values. Another research issue is the impact caused by atmospheric elements likethe aerosol optical depth. Latter will be investigated by meteorological ceilometerbackscatter data, providing data for this issue in an unprecedented accuracy. Furthermore,airborne vehicles will be tested as potential devices to characterize atmospheric layers.Moreover, it will be tested if easy retrievable ground-based measurements can approximatethe city emission function, a very important input for theoretical modelling. And finally, allskymeasurements will show, how far light domes from light emitting cities are visible andcould influence night skies above natural protected areas. Results from this project lead toimportant insights in the understanding of skyglow phenomena and serve as inputs formodelling approaches in the future. Outcomes shall also be used for research disciplines ofother fields, since it creates new fundaments for nature related studies in, e.g., ecology,biology and environmental physics, or technical studies like lighting management,sustainability and energy saving purposes. |
| Project web page: | https://saspro2.sav.sk/documents/fellows/wallner_SK.pdf |
| Duration: | 1.9.2022 – 31.8.2025 |
| Improving Structural Safety and Energy Efficiency Through Development of Extreme Temperature Resistant Sustainable Cement-Based Composites with Post-Fire Self-Healing Features | |
| Zlepšenie štrukturálnej bezpečnosti a energetickej účinnosti prostredníctvom vývoja trvalo udržateľných cementových kompozitov na báze cementu odolných voči extrémnym teplotám s funkciami samoopravenia po požiari | |
| Program: | SASPRO |
| Responsible solver: | Eng. Vedrtnam Ajitanshu, PhD. |
| Duration: | 1.9.2022 – 31.8.2025 |
| Mini wind tunel | |
| Aerodynamický mini Tunel | |
| Program: | Iné projekty |
| Responsible solver: | Ing. Slávik Richard, Ph.D. |
| Duration: | 1.1.2024 – 31.12.2024 |
| Smallscale model of bridge | |
| Malomierkový model mostu | |
| Program: | Iné projekty |
| Responsible solver: | doc. Ing. Papán Daniel, PhD. |
| Duration: | 1.1.2024 – 31.12.2024 |
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| Štúdium vlastností nízko-emisných samozhutniteľných betónov s náhradami cementárskeho slinku s využitím recyklovaného plniva | |
| Program: | DoktoGrant |
| Responsible solver: | Ing. Czirák Peter |
| Duration: | 1.1.2024 – 31.12.2024 |
| The use of passive devices for daylight transport into building interiors. | |
| Využitie pasívnych zariadení na transport denného svetla do budov | |
| Program: | VEGA |
| Responsible solver: | RNDr. Kómar Ladislav, PhD. |
| Annotation: | |
| Duration: | 1.1.2024 – 31.12.2024 |
| MULCEM – Research and development of multi-component cementitious blends for special construction materials | |
| Výskum a vývoj mnohozložkových cementových zmesí pre špeciálne konštrukčné materiály | |
| Program: | APVV |
| Responsible solver: | Prof. Dr. Ing. Palou Martin-Tchingnabé |
| Annotation: | The study of chemistry, phase evolution, and phase equilibrium during the hydration of multicomponent cementitious materials is a key challenge in the development of construction materials with high performance. Therefore,1. the present project deals with the complex study of the effect of normal and hydrothermal curing conditions on hydration reaction of multicomponent cementitious binders for the objective of optimizing the composition of cementitious composites for high-temperature hydrothermal wells;2. the project will develop heavyweight concrete based on the optimized composition of multicomponent cementitious binders and high-density aggregates. The concrete design will take into consideration the radioactive isotopes, in order to minimize the activation effect of gamma and neutron radiations, when it comes to being used as biological shielding in power nuclear plants;3. the purpose of the present project is the development of advanced concrete materials, unique in its kind; Fiber-Reinforced Heavyweight Self-Compacting Mortars with special protection properties against ballistic missiles. The common denominator of these objectives is the chemistry of hydration reaction, including kinetics and mechanisms, phase evolution, and equilibrium of composites comprising Ordinary Portland (OPC) cement and Supplementary Cementitious Materials (SCMs). Different curing regimes (ordinary, hydrothermal), complex chemical analysis including radioactive isotopes of each ingredient, the particle size distribution of binders and aggregates are some of the main factors which are the driving forces for the implementation of the submitted project. |
| Duration: | 1.7.2020 – 30.6.2024 |
| DIFFUSE – Diffuse light in urban environment: A new model which embraces the optical properties of a local urban atmosphere | |
| Difúzne svetlo v mestskom prostredí: nový model zohľadňujúci vlastnosti lokálnej atmosféry | |
| Program: | VEGA |
| Responsible solver: | Mgr. Kocifaj Miroslav, DrSc. |
| Annotation: | Due to elevated contamination by aerosols the diffuse light field in an urban environment differs from what we observe in city surroundings. The impacts on indoor daylight climate from different atmospheric turbidity conditions are also linked to emission sources in a city. Specifically, industry, public transportation, or construction work can produce particles that remain suspended in urban air for days or weeks and change the diffuse-light signatures. No quantification of the phenomena exists, no designed experiments have been performed and the theoretical development is in its infancy. Predictions from the present models are not accurate enough, so it is a great challenge of this project to develop a new optical model of urban atmosphere that 1) accounts for local scale parameters, 2) is applicable to arbitrary conditions, 3) can improve predictions of the diffuse-light patterns in a city, and 4) can be used by experts who deal with daylight and daylighting technologies. |
| Duration: | 1.1.2020 – 31.12.2023 |
| Termomechanics – Effect of nano-, micro-, and meso-nonhomogeneities in the macroscale thermomechanical performance of composite structure members | |
| Efekt nano-, mikro- a mezo-nehomogenít na makro termomechanické chovanie sa kompozitných konštrukcií | |
| Program: | APVV |
| Responsible solver: | Prof. Ing. Sládek Ján, DrSc. |
| Annotation: | This project is aiming to develop methods for the analysis and optimization of the thermomechanical performance of nonhomogeneous structural members operating under thermal, electrical, and mechanical loadings. By aggregating achievements of both the Ukrainian and Slovak partners in the area of thermomechanics of nonhomogeneous structures and non-classical theories of continuum mechanics, we intend to develop advanced techniques for estimating effects of accumulated nano-, micro- and meso-nonhomogeneities in the macroscale performance parameters with account for the size effect, which were failed to be captured when utilizing the homogenization methods. The linear response of the electric polarization of the solids to the temperature gradient and coupled electro-elastic fields caused by a thermal inclusion in isotropic solids is to be studied based on the relations of a local gradient theory of electro-thermo-elasticity. The results are expected to improve the estimation of the thermoelastic performance of structural members and prediction of the feasible material profiles for nonhomogeneous composites for desired operational performance based on their functional designation. |
| Duration: | 1.2.2022 – 31.12.2023 |
| Material composition and properties of Self-Compacting Heavyweight Concrete | |
| Materiálové zloženie a vlastnosti samozhutniteľných ťažkých betónov | |
| Program: | VEGA |
| Responsible solver: | Prof. Dr. Ing. Palou Martin-Tchingnabé |
| Annotation: | The project is based on the development of heavyweight and self-compacting concretes based on cementitious composites containing admixtures (blast furnace slag, metakaolin and ground limestone), heavy aggregates (magnetite, barite or mixtures thereof) and superplasticizers. The project will determine the chemical composition of individual concrete components, including the presence of isotopes, heat during the hydration of cementitious composites, optimized grading curve of heavy aggregates and concrete composition so that the examined material has a bulk density more than 3000 kg / m3 and meets the requirements of self-compacting concretes, which means the capability to compact without any compaction force even at very dense reinforcement, without segregation and sedimentation of its constituents as determined by V-funnel and L-form. Short and long-term mechanical and physical properties of the resulting concrete will be investigated. Self-compacting heavyweight concretes have potential applications in nuclear power plants and in areas exposed to long-term nuclear radiation. |
| Duration: | 1.1.2021 – 31.12.2023 |
| Multiscale study and modelling of composite macrostructures | |
| Multiškálové štúdium a modelovanie kompozitných makrokonštrukcií | |
| Program: | VEGA |
| Responsible solver: | Prof. RNDr. Sládek Vladimír, DrSc. |
| Annotation: | The research project deals with the 2nd order two-scale computational homogenization procedure for modelling composite structures responses. Using the 2nd order homogenization approach, the multiscale analysis may describe more complex deformation modes than the standard 1st order homogenization. The determination of effective material coefficients including those staying at higher-order derivatives of field variables are needed in gradient theory. This can be done by comparing the solutions of certain appropriate boundary value problems (BVP) on the macro- and micro-level. In the microstructural analysis, the microstructural inhomogeneity is modelled and the BVP on the RVE are solved using ordinary local continuum theory. The higher-order continuity requirements in the macro-level formulation can be met by applying C0 continuous approximation independently to primary fields and their gradients, with obeying the kinematic constraints between approximations by collocation at some internal points of elements. |
| Duration: | 1.1.2020 – 31.12.2023 |
| The energy efficiency of an innovative BIPV/T-TE-PCM module with PCM passive cooling | |
| Výskum energetickej účinnosti inovatívnych BIPV/T článkov chladených PCM technológiou. | |
| Program: | VEGA |
| Responsible solver: | RNDr. Kómar Ladislav, PhD. |
| Annotation: | The objective of the presented proposal is to evaluate the efficiency of an innovative BIPV/T-TE-PCM (TE, thermoelectric; PCM, phase change material) for which little or no information is available. The emphasis is the operational performance assessment of proposed BIPV/T-TE-PCM module under practical conditions. The application of an integration model requires its coupling the building energy simulation with solar radiation availability models. The integration of PCM into a photovoltaic cell is important in terms of passive cooling of the panel, whose efficiency decreases with increasing temperature and also because of its prolonged service life, as thermal expansion can cause mechanical stress to the individual cell layers. In addition, the energy stored in the PCM will allow it to be used in the next phase, e.g. for water heating. The results will be structured in terms of the assessment analysis of this innovative BIPV/T-TE-PCM façade toward improving thermal comfort and energy efficiency of buildings. |
| Duration: | 1.1.2020 – 31.12.2023 |
| SKYGLOW – Global Characterization of Skyglow | |
| Globálna charakterizácia svetelného znečistenia | |
| Program: | APVV |
| Responsible solver: | Mgr. Kocifaj Miroslav, DrSc. |
| Annotation: | In spite of the enormous progress in light pollution (LP) research since Garstang, subsequent theories are still limited to homogeneous skies, while the propagation of artificial light at night (ALAN) under broken cloud arrays remains largely unexamined. Due to its negative impacts, ALAN is currently one of the most pressing environmental concerns in the public eye. Thus major concerns were raised after experimental results showed that the predicted distributions and amplitudes of the ALAN differ from what we regularly observe in nature. Also, the mechanism of multiple scattering and optical distortion due to aerosols are both poorly described. This project will bring a fundamental understanding and satisfactory treatment of ALAN, while addressing the principal question: “How and to what extent the properties of both the artificially lit surface of Earth and the atmosphere can interact together, resulting in new means in the characterization and potential manipulation of ALAN”. We propose to 1) derive novel formulations and solutions to the light field in the nocturnal atmosphere with arbitrary cloud configurations; 2) uncover spectral “light-scattering and polarization fingerprints” that distinct types of clouds and aerosols can have in different parts of the sky; and 3) identify the manner in which both the atmosphere and light emissions from ground sources control ALAN. This could revolutionize the characterization of LP sources globally and have unexpected consequences in current developments in various fields. Overall, the project has great potential to open doors into a new research area with important applications in astronomy, lighting engineering, urban planning and also satellite remote sensing of aerosols at night, to which no competitive alternatives yet exist. The significance and novelty of the work will also lead to the acquisition of knowledge necessary to explain anomalous polarization features, or ALAN effects, due to compact and diffuse cities. |
| Duration: | 1.7.2019 – 30.6.2023 |
| Metamaterial – Optimal design of micro/nano structures for metamaterials | |
| Optimálny návrh mikro/nano konštrukcii pre metamateriály | |
| Program: | APVV |
| Responsible solver: | Prof. Ing. Sládek Ján, DrSc. |
| Duration: | 1.7.2019 – 30.6.2023 |
| ReDirCom – Research of direct component of daylighting in architectural and interior environment | |
| Výskum priamej zložky dennej osvetlenosti v architektonickom a interiérovom prostredí | |
| Program: | VEGA |
| Responsible solver: | doc. Ing. Peterková Stanislav, CSc. |
| Annotation: | Development in daylighting research is directed to better utilization of skylight and sunlight.Evaluation according to the most unfavourable condition is reasing and climatic approach of annual daylight utilization is introduced.Research of diffuse aylight availability has brought methodology of the standard interior daylighting evaluation.The availability of the direct component of the global illuminance which contributes to the dynamics ofvisual environment and influences physiological functions of human body is not yet explored. Sun radiation is the main source of life on the Earth.In the urban area the important role plays architectural formation of environment.The building and architecture are seen as a static element with given attributes.Newapproach requires solutions of adaptable and flexible forms based on the diversity. Project will search availability of direct illuminance, influence of sun radiation on the quality of the interiorenvironment and adaptable and flexible architectural forms. |
| Duration: | 1.1.2020 – 31.12.2022 |
| Flexoelectricity – A multiscale flexoelectric theory and a new method for real-time detection of microcracks in dielectric materials | |
| Multiškalova teória flexoelektricity a nové metódy pre detekciu mikrotrhlín v reálnom čase v dielektrických materiáloch | |
| Program: | APVV |
| Responsible solver: | Prof. Ing. Sládek Ján, DrSc. |
| Duration: | 1.10.2018 – 30.9.2021 |
| NCRUMKL – The mechanisms of targeted resonant attenuation of microwave signals | |
| Nežiadúci a cielený rezonančný útlm mikrovlnných komunikačných liniek | |
| Program: | Iné projekty |
| Responsible solver: | Mgr. Kocifaj Miroslav, DrSc. |
| Annotation: | |
| Duration: | 1.4.2019 – 30.6.2021 |
| Study of hydration process and microstructure development in multi-component cementitious binders | |
| Štúdium procesov hydratácie a vývoja mikroštruktúry v mnohozložkových cementových spojivách | |
| Program: | VEGA |
| Responsible solver: | Prof. Dr. Ing. Palou Martin-Tchingnabé |
| Annotation: | The present project deals with the development of advanced inorganic binders based on the multi-component cements containing supplementary cementitious materials (blast furnace slag, metakaolin and silica fume). An efficient use of the multi-component cements in high-performance concretes under normal and hydrothermal conditions (geothermal and oil depth wells) of application will be explored through the project. Materials will be preferentially prepared from the domestic raw materials resources. The project will focus on the study of chemistry, kinetics and mechanism of hydration in proposed systems. The interaction among particular supplementary cementitious materials, their activation process and the impact of synergetic effect upon the performance of final materials will be also investigated. In order to optimize the composition of systems the best, mechanical and physical properties will be determined as for the referential cement, corresponding binary and ternary mixtures as for the target four compounds systems. |
| Duration: | 1.1.2017 – 31.12.2020 |
| V4-KOREA_RADCON – The Effect of Chemical Composition of Concrete on Its Long-term Performance in Irradiated Environment | |
| Vplyv chemického zloženia betónu na jeho dlhodobú trvanlivosť v (ionizujúcom) ionizovanom prostredí | |
| Program: | Iné projekty |
| Responsible solver: | Prof. Dr. Ing. Palou Martin-Tchingnabé |
| Duration: | 1.10.2017 – 30.9.2020 |
| Research on High Performance cementitious Composites under hydrothermal conditions for potential application in deep borewells | |
| Výskum vysokohodnotných cementových kompozitov za hydrotermálnych podmienok pre potenciálne využitie v hĺbkových vrtoch | |
| Program: | APVV |
| Responsible solver: | Prof. Dr. Ing. Palou Martin-Tchingnabé |
| Annotation: | The High Performance cementitious composites (HPCC) based on nontraditional binders are perspective for application in severe conditions of chemical, physical and mechanical hydrothermal load of geothermal, oil or gas wells. The development of such materials requires a systematic numerical simulation of bore wells taking into consideration temperatures, vapor pressure and deep of wells. The results of numerical simulation will be used to model the hydrothermal parameters of laboratory autoclave in order to set the suitable material compositions for the development of High Performance cementitious composites (HPCC).The project has three essential features:1. The numerical simulation of conditions in deep geothermal and oil wells for research and development of High Performance Cementitious Composites (HPCC) with exceptional chemical, physical and mechanical properties. Development of different variants of finite-element models of deep borehole structures and the specific programs to process the inputs and outputs of numerical simulations.2. Study of the chemical and physical processes leading to the formation of chemical bonds of the Non-traditional binders under hydrothermal conditions, including the evaluation of the pore structure, microstructure development and properties of High performance cementitious composites. 3. The use of laboratory autoclave under special conditions for synthesis of geopolymer zeolite and hydroceramics, such as hydroxyapatite for various applications in the power plant, chemical industry, the environment, agriculture, biomedicine, etc… |
| Project web page: | http://www.geomat.sav.sk/ |
| Duration: | 1.7.2016 – 30.6.2020 |
| SCC material and – Material and mechanical performance of heavyweight self compacting concrete (SCC) | |
| Materiálové zloženie a mechanické vlastnosti ťažkého a samozhutňujúceho sa betónu | |
| Program: | APVV |
| Responsible solver: | Prof. Dr. Ing. Palou Martin-Tchingnabé |
| Annotation: | Establishment of network of experts from Slovakia and Korea in Civil and Material Engineering to submitthe bilateral research within the present call. The main item is about self compacting concrete (SCC) andheavyweight concrete (HWC). The present project has a challenge to develop heavyweight concretewithout segregation and with characteristics of Self Compacting Concrete.Slovakia takes the material performance of baryte aggregate concrete. Korea takes the fracture behaviorof baryte aggregate concrete and. Both principal investigators from Korea and Slovakia will successfullyconduct this bilateral research. We expects this international research will bring some of significantresearch output to the society in the field of civil construction. |
| Duration: | 1.9.2018 – 31.12.2019 |
| Effectiveness of bended light guides under arbitrary sky conditions including broken cloud arrays | |
| Optické vlastnosti zalomených svetlovodov za podmienok nehomogénnej oblačnosti s ľubovoľným pokrytím oblohy | |
| Program: | VEGA |
| Responsible solver: | Mgr. Kocifaj Miroslav, DrSc. |
| Annotation: | A curved surface as well as bends of hollow light guides both cause the light field is transformed in a complex way between a light exit surface and light entrance surface. Most of light-guide models fail in reproducing illuminance patterns under varying atmospheric conditions including cloud fields formed into non-static arrays. The effect of broken clouds on light field bellow the light guide will be the first time treated in its complexity in this project. We will qualify and quantify the effect of bends and their positions on the light-pipe effectiveness, while the theoretical and numerical results will be applied in predictions of illuminance distribution at a workplane. The targeted optical experiments in a local atmosphere are aimed i) to prove the solution concept as well as ii) to identify the effects of different cloud types on light guide optical properties. This should improve the accuracy of optical modeling in different localities accepting prevailing types of clouds and turbidity conditions. |
| Duration: | 1.1.2016 – 31.12.2019 |
| Coupled problems of thermal and electromechanical fields in advanced materials with porous microstructure | |
| Viazané úlohy tepelných a elektromechanických polí v piezoelektrických materiáloch s poréznou mikroštruktúrou | |
| Program: | VEGA |
| Responsible solver: | Prof. RNDr. Sládek Vladimír, DrSc. |
| Annotation: | Main goal of this project is to analyze coupling phenomena of thermal, electric and mechanical fields in porous piezoelectric media. Various coupling effects are possible between the physical fields leading to possible new applications. Characterization of these effects will be performed via computer simulations. Two material models for piezoelectric media will be considered – dielectric piezoelectric model and semiconductor piezoelectric model. Effect of porosity on thermal, electric and mechanical response will also be investigated. Besides the well-developed numerical methods a novel formulation of scaled boundary finite element method (SBFEM) will be considered for the numerical analyses. Advantages of this method can be effectively utilized to predict the behaviour of porous piezoelectric media in multilayer or 3D axisymmetric problems. Research results may be useful for the optimal design of advanced piezoelectric sensors and devices to enhance their measurement capabilities or structural integrity. |
| Duration: | 1.1.2016 – 31.12.2019 |
| Multifyzkálne do – Multiphysical problems in functionally graded materials plates | |
| Multifyzikálne problémy v doskách z funkcionálne gradientných materiálov | |
| Program: | APVV |
| Responsible solver: | Prof. RNDr. Sládek Vladimír, DrSc. |
| Annotation: | The project deals with a unified theoretical and numerical treatment of the plate bending in interactions with various physical fields with including some possible chemical changes. Besides the classical theory of thin plates (Kirchhoff-Love theory, KLT), we shall consider also the first and third order shear deformation plate theories (FSDPT and TSDPT). Moreover, the materials of the plates are allowed to be functionally graded (FGM), hence the governing equations are partial differential equations with variable coefficients. According to the physical fields affecting the response of the plate, we shall deal with the following groups of coupling effects in bending problems for FGM plates: (i) dynamic effects, (ii) thermo-elastic coupling effects, (iii) electro-magneto-elastic coupling effects, (iv) thermo-electro-magneto-chemo-elastic coupling effects. A unified approach based on the variational principles of thermodynamics will be applied to derivation of governing equations and formulation of boundary conditions for considered multi-field problems. The study of coupling effects will be performed via computer simulations. For this purpose, advanced numerical techniques have to be developed. We plan to elaborate strong formulations with element-free approximations for spatial variations of field variables. |
| Duration: | 1.7.2015 – 30.6.2019 |
| EIOK – Research of solar energy influences and integrated envelopes on the quality of the environment in buildings and cities | |
| Energetické vplyvy slnečného žiarenia a integrovaných obvodových konštrukcií na kvalitu prostredia v budovách a mestách | |
| Program: | VEGA |
| Responsible solver: | doc. Ing. Peterková Stanislav, CSc. |
| Annotation: | Potential of solar energy is less utilised in building performance. Daylight and sunlight as natural energy sources should be utilised for good illumination of work places and their protection against glare and overheating. Building envelopes decide about measure of interaction of indoor environment and exterior conditions. Finding thismeasure is project subject. Buildings have a large areas of envelops exposed by sun energy. The exploitation of horizontal and vertical envelopes other way like for production electricity and hot water is looking for. Project will search functions of building integrated envelopes in complex, their dynamic relations between exterior conditions and indoor environment quality and formulate criteria and design requirements. Irradiance data measured at Institute of Construction and Architecture in Bratislava will be applied. |
| Duration: | 1.1.2017 – 1.1.2019 |
| LP – Anthroposphere and light pollution | |
| Antroposféra a svetelný smog | |
| Program: | Iné projekty |
| Responsible solver: | Mgr. Kocifaj Miroslav, DrSc. |
| Annotation: | |
| Project web page: | http://otvorenaakademia.sav.sk/vyskumne-programy/medzi-zemou-a-vesmirom/vt-6-antroposfera-a-svetelny-smog/ |
| Duration: | 1.1.2018 – 31.12.2018 |
| Modellintg of post-buckling behaviour and strength of thin-walled cold formed columns | |
| Modelovanie pokritického pôsobenia tenkostenných za studena tvarovaných prvkov | |
| Program: | VEGA |
| Responsible solver: | Ing. Kriváček Jozef, CSc. |
| Duration: | 1.1.2015 – 31.12.2018 |
| Monitoring of the hygrothermal regime of the UNESCO object of St Jame\’s Church in Levoči and national herritage object St Martin\’s Cathedrale in Bratislava | |
| Monitorovanie tepelno – vlhkostného režimu UNESCO pamiatky kostola sv. Jakuba v Levoči a národnej pamiatky katedrály sv. Martina v Bratislave | |
| Program: | VEGA |
| Responsible solver: | Ing. Matiašovský Peter, CSc. |
| Annotation: | The project deals with the monitoring of hygrothermal regime of two monuments, namely an object nationalheritage, St. Martin’s Cathedral in Bratislava and an UNESCO monument, the St. James Church in Levoča.Monuments are located in different geographical positions. Both objects are built from materials having a porousstructure. In the pores may be found the air, water wapour, water or ice, depending on environmental conditions.A change in thermal conductivity of the porous structure is utilized for monitoring. |
| Duration: | 1.1.2016 – 31.12.2018 |
| Multiscale model – Multiscale modelling of coupled fields in composite materials | |
| Multiškálové modelovanie viazaných polí v kompozitných materiáloch | |
| Program: | APVV |
| Responsible solver: | Prof. Ing. Sládek Ján, DrSc. |
| Annotation: | Multiscale modeling is applied for composite materials to predict material properties or system behavior based on knowledge of the microstructure. It is very powerful computational tool for modeling of composite structures, where microstructure level cannot be applied for the whole structure due to size memory limits of available top computers. A new class of hybrid/mixed finite elements and scaled boundary finite element method are aimed to be developed for evaluation effective material properties on the representative volume element and for macro structure analyses. Both methods are applied to heat conduction problems, where microstructure effect should be considered in numerical analyses. Multiscale approach and Cowin & Nunziato model are used to analyze crack problems in composites with voids. The present project extends knowledge of crack behaviour in magneto-electro-elastic solids with voids. The influence of initial electron density and porosity on the stress intensity factor and electric displacement intensity factor for crack problems in electrically conducting piezoelectric composite with voids is investigated. |
| Duration: | 1.7.2015 – 31.12.2018 |
| Influence of repeated and long – term loading on interaction of parameters at reconstruction of reinforced concrete elements | |
| Vplyv opakovaného a dlhodobého namáhania na parametre interakcie pri sanácií železobetónových prvkov | |
| Program: | VEGA |
| Responsible solver: | Ing. Križma Martin, PhD. |
| Duration: | 1.1.2015 – 31.12.2018 |
| High porous inorganic materials for thermal insulating applications | |
| Vysokoporézne anorganické materiály pre tepelno-izolačné aplikácie | |
| Program: | VEGA |
| Responsible solver: | Ing. Kuzielová Eva, PhD. |
| Annotation: | The main aim of the project is the investigation of new inorganic foam concrete materials, which represent novelsubstances for energetically efficient construction materials. In our preliminary experiments, the foam with unique microstructure and bulk density below 200 kg m-3 was obtained (reported values for foam concretes: 400 – 1600 kg m-3). The key process of the preparation of the highly porous materials is the transformation of the wet foam into the dry foam connected to the change of initial gas/liquid to gas/solid/liquid interface. Preparation of stable dry foam with convenient mechanical properties requires better understanding of foam destabilizationmechanisms in the presence of solid particles. The main goal of the project is therefore the study of adsorptionmechanism of surfactants on the surface of solid particles in the water and their self-arrangement on the bubblesurfaces as a function of the particle size, chemical composition of cements, surfactant type and components concentration. |
| Duration: | 1.1.2015 – 31.12.2018 |
| GenSkyCEF – Generalized skyglow model and its application to retrieval of city emission function | |
| Zovšeobecnený model jasu/žiary nočnej oblohy a jeho aplikácia pri získavaní emisnej funkcie miest | |
| Program: | APVV |
| Responsible solver: | Mgr. Kocifaj Miroslav, DrSc. |
| Annotation: | For over a decade excessive night lighting has been recognized as a serious, wasteful problem that led to formulation of research priorities in fighting the intrusion of light pollution. Recently a special attention is paid to atmospheric optics and its environmental impacts.It is well recognized that clouds are the greatest modulators of downwelling diffuse radiation. Nevertheless, they remain the largest source of uncertainty in characterizing the light field under night-sky conditions. This is the first time a research project will treat these problems comprehensively by embracing statistically relevant cloud configurations. Concurrently, an interrelationship between radiance distributions and aerosol optics would be addressed theoretically, numerically, and experimentally following data gathering at a location surrounded by various sources of pollution, such as public transportation or factories in industrialized zones. These sources produce particles of different composition and morphology.Apart from clouds and aerosols, the temporal and spatial changes of a light field are determined by the bulk emission function of ground-based light sources (in this project City Emission Function is abbreviated CEF). However, for most of these sources it is becoming increasingly difficult to obtain the radiant intensity distribution as a function of zenith angle. Although knowledge of such emission patterns is extremely important for skyglow modelling, too little attention has been paid to the characterization of CEF. Therefore, following the radiative transfer principles we will develop a remote sensing technique for determining the mean emission function for a city. |
| Duration: | 1.7.2015 – 31.12.2018 |
| Multiscale modeling of layered, fibre reinforced and porous magnetoelectric materials | |
| Multiškálové modelovanie vrstevnatých, vláknami vystužených a poréznych magnetoelektrických materiálov | |
| Program: | SASPRO |
| Responsible solver: | Dr. Ing. Wünsche Michael |
| Duration: | 1.9.2015 – 31.8.2017 |
| Synthesis and characterization of chemically bonded phosphate ceramic binders | |
| Syntéza a charakterizácia chemicky viazaných fosfátových keramických spojív | |
| Program: | VEGA |
| Responsible solver: | Prof. Dr. Ing. Palou Martin-Tchingnabé |
| Annotation: | The proposed project deals with the chemistry, kinetics and mechanism of hydration of chemically bonded phosphate ceramic binders under hydrothermal curing conditions.Also, the project deals with the study of in-situ hydration process and the determination of chemical bond characters of hydration products in severe environments with cumulated effects of temperature, pressure (hydrothermal) and chemical aggression.The project focuses on examining the process of formation of stable hydrated structure during hydrothermal synthesis of specific binders in relation with changes in the microstructure, pore structure, resistance against hydrothermal effects with chemical aggression. The analysis of the chemistry, kinetics and mechanism of these processes will offer significant information about the behaviors of the new binders in application conditions found primarily in oil, gas or geothermal wells. |
| Duration: | 1.1.2014 – 31.12.2016 |
| Computational methods for fracture analyses of quasicrystal materials | |
| Vypočtové metódy pre riešenie úloh lomovej mechaniky v kvázikryštalických materiáloch | |
| Program: | VEGA |
| Responsible solver: | Prof. Ing. Sládek Ján, DrSc. |
| Annotation: | The main goal of this project is to bring the physically consistent development of the Local Integral Equation (LIE) formulations together with their implementation by using domain-type approximations of the primary field variables for modeling of fracture of quasicrystals. The considered applications concern the multi-field interaction of phonon and phason displacements. The material anisotropy and continuously non-homogeneous media are considered. The existing elasticity theory of quasicrystals should be extended into problems of thermoelasticity of quasicrystals to utilize special thermal properties of quasicrystals. Both stationary and dynamic boundary value problems are analyzed in the project. Some typical crack defect problems in two-dimensional (2D) octagonal quasicrystals are analyzed. It is shown that the asymptotic fields in the crack-tip vicinity in a continuously nonhomogeneos medium is the same as in a homogeneous one. The stress intensity factors for various material gradation and under mechanical and thermal loads are evaluated. The research results can be helpful for optimal gradation of constituents to enhance the structural integrity of the advanced composite. |
| Duration: | 1.1.2013 – 31.12.2016 |
| Research of envelope construction influences on luminous and thermal environment in attic spaces. | |
| Výskum vplyvu obalových konštrukcií na zmeny svetelného a tepelného prostredia v podkrovných priestoroch. | |
| Program: | VEGA |
| Responsible solver: | doc. Ing. Peterková Stanislav, CSc. |
| Duration: | 1.1.2014 – 31.12.2016 |
| SIMDAYAS – Simulation of daylight in artificial sky | |
| Simulovanie denného svetla v umelej oblohe | |
| Program: | APVV |
| Responsible solver: | doc. Ing. Peterková Stanislav, CSc. |
| Duration: | 1.10.2013 – 12.12.2016 |
| – | |
| Experimentálna a teoretická analýza sorpcie vodnej pary v stavebných materiáloch | |
| Program: | APVV |
| Responsible solver: | Ing. Matiašovský Peter, CSc. |
| Duration: | 1.1.2015 – 31.12.2015 |
| Optical characterization of non-spherical atmospheric particles and retrieval of their microphysical properties | |
| Optická charakterizácia mikrofyzikálnych vlastností atmosférických častíc nesférického tvaru | |
| Program: | VEGA |
| Responsible solver: | Mgr. Kocifaj Miroslav, DrSc. |
| Duration: | 1.1.2012 – 31.12.2015 |
| Moisture transfer and accumulation in building materials under service conditions | |
| Prenos a akumulácia vlhkosti v stavebných materiáloch pri prevádzkových podmienkach | |
| Program: | VEGA |
| Responsible solver: | prom. fyz. Koronthályová Oľga, CSc. |
| Annotation: | The objectives of the research project are: Experimental determination and modelling of an influence of carbonation and presence of some salts on parameters of moisture transport and accumulation – water vapour diffusion, capillary transport of liquid water and water vapour sorption – for chosen building materials. An analysis of the pore structure and mineralogical changes in tested building materials. A quantification of importance of the noticed changes of moisture transport and accumulation parameters for numerical simulation of hygro-thermal performance of building structures. |
| Duration: | 1.1.2013 – 31.12.2015 |
| Progressive ternary blended cement systems with high-performance properties for material technologies and hydrothermal conditions | |
| Progresívne ternárne zmesové cementové systémy s vysokoužitkovými vlastnosťami pre materiálové technológie a hydrotermálne podmienky | |
| Program: | VEGA |
| Responsible solver: | RNDr. Krajči Ľudovít, PhD. |
| Annotation: | Definition of calcined kaolin sand and diatomite for use in cement composites. Optimization of composition of cement ternary systems. Study of ternary mixtures hydration, evolution of phase composition and development of pore structure. Investigation of mutual interactions of components in ternary systems. Specification of synergic effect measure. Study of pozzolana efficiency. Determination of basic properties of mixtures. Assessment of long-term corrosion resistance in aggressive environment. Definition of contribution to improvement of cement composite performance connected with assignment of added value what is given by the increase of efficiency measure of pozzolanic reaction. Definition of optimal parameters of composite mixtures of cement and non-traditional binders using natural materials as well as parameters of hydrothermal technology used for manufacturing these composites. Development of methods for mathematical modeling of composite mixtures and prognosis of utility properties of materials. |
| Duration: | 1.1.2012 – 31.12.2014 |
| Determination of parameters of interaction at strengthening of reinforced concrete elements with regard to rheological properties | |
| Stanovenie parametrov interakcie pri zosilňovaní železobetónovýych prvkov so zohľadnením reologických vlastností | |
| Program: | VEGA |
| Responsible solver: | Ing. Križma Martin, PhD. |
| Annotation: | Experimental and theoretical analysis of the characteristics of the serviceability limit states of damaged and consecutively repaired linear reinforced concrete elements. The employed methods of repair – the combination of cracks grouting and the application of FRP strips or the over-concreted slab. The specification of criteria for the ultimate limit state by the strain work for the respective loading modes – step-by-step increasing load with unloading, simulated moving load and long-term load, along with the separation of the effects of shear forces and bending moments on the resultant values. The analysis of the degradation in adhesion between the strengthening elements and the initial damaged surface in the case of FRP strips application. In the case of strengthening by means of the coupling slab the analysis of two coupling methods (toothing/plugs employment) will be made. Improvement of the calculation methods – the FEM (modified programme ATENA) will be used at modelling of the cracks development taking into account the loading mode of the element. |
| Duration: | 1.1.2012 – 31.12.2014 |
| Influence of imperfections on resistance of structural members and load-bearing structures of machines | |
| Vplyv imperfekcií na odolnosť konštrukčných prvkov a nosných konštrukcií strojov | |
| Program: | VEGA |
| Responsible solver: | Ing. Sadovský Zoltán, DrSc. |
| Duration: | 1.1.2012 – 31.12.2014 |
| Numerical simulations of multifield problems in multiphase porous media | |
| Numerické simulácie interakcií polí vo viacfázových poréznych médiach | |
| Program: | APVV |
| Responsible solver: | Prof. RNDr. Sládek Vladimír, DrSc. |
| Duration: | 1.5.2011 – 31.10.2014 |
| inteligentné kom – Optimal design of smart composite materials | |
| Optimálny návrh inteligentných kompozitných materiálov | |
| Program: | APVV |
| Responsible solver: | Prof. Ing. Sládek Ján, DrSc. |
| Duration: | 1.5.2011 – 31.10.2014 |
| PMOHAM – Probabilistic modelling of hygro-thermal performance of buildings | |
| Pravdepodobnostné modelovanie tepelno-vlhkostného správania budov | |
| Program: | APVV |
| Responsible solver: | Ing. Sadovský Zoltán, DrSc. |
| Annotation: | The main objective of the project is probabilistic modelling of the building energy consumption, hygro-thermal state in the building envelope and hygro-thermal state in the building interior. For the development of a new energy consumption and hygro-thermal performance prediction methodology based on probabilistic approach, merging current knowledge in the building physics field – heat, air and moisture transport and in the structural reliability field is assumed. Particular solution steps: collection and statistical analysis of the input material parameters and boundary conditions, selection and modification of suitable deterministic models and algorithms of the hygro-thermal performance of buildings for the use in the probabilistic solution, definitions of the limit states – criteria of acceptable hygro-thermal building performance, solutions of the probability of not exceedance of the limit states, comparison of the results obtained with the available in situ measurements and recommendations for the practical use. |
| Duration: | 1.5.2011 – 31.10.2014 |
| Unified system of sky luminance patterns characterizing daylight availability and conditions in urban spaces | |
| Všeobecný model oblohových jasov pre charakterizovanie dostupnosti denného svetla v mestských lokalitách | |
| Program: | APVV |
| Responsible solver: | Mgr. Kocifaj Miroslav, DrSc. |
| Duration: | 1.5.2011 – 31.10.2014 |
| Research of quantitative and qualitative daylighting characteristics in buildings | |
| Výskum kvantitatívnych a kvalitatívnych charakteristík denného osvetlenia v budovách | |
| Program: | VEGA |
| Responsible solver: | doc. Ing. Peterková Stanislav, CSc. |
| Duration: | 1.1.2011 – 31.12.2013 |
| Wind – Wind action in structural engineering | |
| Účinky vetra na stavebné konštrukcie | |
| Program: | APVV |
| Responsible solver: | Doc. Ing. Tesár Alexander, DrSc. |
| Duration: | 1.5.2011 – 31.10.2013 |
| CEKOMAT II – Development of CE for research and development of composite materials for structural applications – 2nd stage | |
| Budovanie CE na výskum a vývoj konštrukčných kompozitných materiálov – 2. etapa | |
| Program: | Štrukturálne fondy EÚ Výskum a vývoj |
| Responsible solver: | Ing. Matiašovský Peter, CSc. |
| Duration: | 1.7.2010 – 31.12.2012 |
| Effective moisture capacity of building materials under dynamic conditions | |
| Efektívna vlhkostná kapacita stavebných materiálov v dynamických podmienkach | |
| Program: | VEGA |
| Responsible solver: | prom. fyz. Koronthályová Oľga, CSc. |
| Annotation: | The objective of the research project is experimetal determination and modeling of real effective moisture capacity of chosen building materials at cyclic variations of relative humidity, for different relative humidity ranges and for different relative humidity variations dynamics (cycle period). Development of a generalized sorption hysteresis effect model considering material microstructure. Implementation of the model into numerical calculation tool for simulation of hygrothermal performance of building materials and structures. |
| Duration: | 1.1.2010 – 31.12.2012 |
| Serviceability characteristics of strengthened damaged reinforced concrete linear elements | |
| Charakteristiky použiteľnosti zosilnených poškodených železobetónových lineárnych prvkov | |
| Program: | VEGA |
| Responsible solver: | Ing. Križma Martin, PhD. |
| Annotation: | Theoretic-experimental analysis of characteristics defining serviceability limit states of the damaged and consecutively strengthened reinforced concrete structural elements with flanged cross-section. Grouting of cracks of the damaged elements and their consecutive strengthening by means of FRP strips or by the over-concreted coupling slab. Verification of strengthening methods under step-by-step increasing load with unloading, under moving and long-term load. Reliability assessment of the elements by the amount of the strain work. Comparison of the experimental results with the substitutive numerical model for selected elements in dependence on the loading mode |
| Duration: | 1.1.2009 – 31.12.2011 |
| Interactive buckling of thin-walled structural elements | |
| Interaktívna strata stability tenkostenných prvkov konštrukcií | |
| Program: | VEGA |
| Responsible solver: | Ing. Sadovský Zoltán, DrSc. |
| Annotation: | A vast amount of research work has been recently devoted to the development of methods specifically aimed at the design of thin-walled members and structures, as it is shown in the aims of workgroup ECCS – TWG 7.5. According to these goals, the proposed research project is focused on the analysis of behavior and strength of perfect and real cold-formed thin-walled members with different types of cross-sections, loading and end conditions. Special emphasis is placed on effective utilization and improvement of known numerical methods as well as on design approaches for practical application. A new aspect of the study is an introduction of initialgeometrical imperfections using an integral – energy measure of the imperfections instead of the traditionally used amplitude, which represents a local measure. |
| Duration: | 1.1.2009 – 31.12.2011 |
| Modern bionic structures and materials | |
| Moderné bionické konštrukcie a materiály | |
| Program: | VEGA |
| Responsible solver: | Doc. Ing. Tesár Alexander, DrSc. |
| Duration: | 1.1.2009 – 31.12.2011 |
| Natural aluminosilicates based on active amorphous SiO2 as component of newcement binders with high qualitative parameters of cement composites | |
| Prírodné aluminosilikáty založené na aktívnom amorfnom SiO2 ako zložka nových zmesných cementových spojív s vysokými kvalitatívnymi parametrami cementových kompozitov | |
| Program: | VEGA |
| Responsible solver: | RNDr. Krajči Ľudovít, PhD. |
| Annotation: | The study of interaction of natural aluminosilicate with amorphous SiO2 content (diatomite clay) with Portland cement. The course of hydration, formation of phase composition and basic utility properties of relevant cement composites. Verification of activity of original diatomite clay and transformed (calcined) diatomite clay in cement systems in comparison with calcined kaolin sand containing active metakaolin. Checking of pozzolan effectiveness in innovative binder with active diatomite and metakaolin on base of Portland cement. Appreciation of mutual interactions and contribution to quality improvement of final cement systems under contemporary definition of added value. Optimalization of new binder composition on principle of activity effectiveness of pozzolans in systems on Portland cement basis. |
| Duration: | 1.1.2009 – 31.12.2011 |
| Modelling and numerical simulations of multifield effects in structural elements of piezomaterials | |
| Modelovanie a numerické simulácie interakčných javov v konštrukčných prvkoch z piezomateriálov | |
| Program: | VEGA |
| Responsible solver: | Prof. RNDr. Sládek Vladimír, DrSc. |
| Annotation: | The main goal of this project is to bring the physically consistent development of the Local Integral Equation (LIE) formulations together with their implementation by using domain-type approximations of the primary field variables. The considered applications concern the multi-field problems including mutual interactions of elastic deformations, electro-magnetic and thermal fields; investigation of transient dynamic problems; study of cracks for damage of materials; consideration of material anisotropy and continuously non-homogeneous media. Beside the consideration of the initial-boundary value problems in general continuum theory, we shall deal also with special structural elements such as plates and/or shells considered within the Mindlin-Reissner theory. The attention will be paid also to the study of convergence of accuracy, to numerical stability, and computational efficiency of the derived formulations. Various mesh-free approximations will be used for the numerical implementation of the LIEs with performing tests in numerical experiments. The main handicap of mesh-free formulations is the time consuming evaluation of the shape functions at integration points. To eliminate this disadvantage, we plan to develop analytical integrations under certain assumptions to reduce substantially the time needed for creation of the system matrix of discretized equations. |
| Duration: | 1.1.2009 – 12.12.2011 |
| Centre for applied research of composite materials for deep geothermy | |
| Centrum aplikovaného výskumu kompozitných materiálov pre hĺbkovú geotermiu | |
| Program: | Štrukturálne fondy EÚ Výskum a vývoj |
| Responsible solver: | Ing. Matiašovský Peter, CSc. |
| Duration: | 25.9.2009 – 31.8.2011 |
| WALFOAM – Development of alluminium foam panel for ceiling cooling and wall heating | |
| Vývoj panelu z hliníkovej peny pre stropné chladenie a stenové vykurovanie | |
| Program: | APVV |
| Responsible solver: | Ing. Mihálka Peter, PhD., |
| Annotation: | Aim of the project is to develop heating/cooling panel for ceiling cooling and wall heating and to design technology for its manufacturing. Base material of the panel is aluminium foam in which, the pipe register for heating/cooling medium is integrated. |
| Duration: | 1.9.2009 – 31.8.2011 |
| CAPACINS – Capillary active thermal insulation system for building renovation | |
| Kapilárne aktívny tepelnoizolačný systém pre obnovu budov | |
| Program: | APVV |
| Responsible solver: | Ing. Matiašovský Peter, CSc. |
| Duration: | 1.6.2008 – 30.6.2011 |
| Development of cement composites from electric and electronic plastic waste for application in the building industry | |
| Vývoj cementových kompozitov z plastovej drviny z elektrických a elektronických odpadov pre aplikácie v stavebníctve | |
| Program: | Mechanizmus EHP |
| Responsible solver: | Ing. Matiašovský Peter, CSc. |
| Duration: | 1.5.2009 – 30.4.2011 |
| Creation of CE for research and development of composite materials for structural engineering, construction and medical applications | |
| Vytvorenie CE na výskum a vývoj konštrukčných kompozitných materiálov pre strojárske, stavebné a medicínske aplikácie. | |
| Program: | Štrukturálne fondy EÚ Výskum a vývoj |
| Responsible solver: | Ing. Matiašovský Peter, CSc. |
| Duration: | 1.5.2009 – 28.2.2011 |
| Modern architect – Modern architecture as heritage: low energy renewal | |
| Moderná architektúra ako pamiatka: energeticky úsporná obnova | |
| Program: | APVV |
| Responsible solver: | Prof.Ing.arch. Dulla Matúš, DrSc. |
| Annotation: | Modernity distanced itself from historical architecture by stressing temporality and opening the wide range of building types, structures and materials. Today it is entirely functional and subjected to utility changes. This is entirely new situation for modern heritage conservation. The research project will focus on problems that appear in this field and will provide solutions. Proposed investigation deals with modern architecture (in Slovakia) and relates to the wider understanding of modernity (DOCOMOMO), which spanning from interwar modern architecture in Slovakia to second half of the 20th century late modern architecture. Specificities of modern authenticity and structure of values will be defined. Characteristic types of distinct periods will be investigated. Database of building structures, materials and building envelopes (facade and roof envelopes, structures of openings) will be elaborated. Investigation on characteristic materials and details regarding limits of their substitutions will be provided. Possibilities of enhancing utility and energy-saving performance by change or supplementary insulation protection regarding conservation values will be defined. |
| Project web page: | http://www.register.ustarch.sav.sk/ |
| Duration: | 1.6.2008 – 31.12.2010 |
| PCPS – Precision control of piezoelectric systems | |
| Presné riadenie piezoelektrických systémov | |
| Program: | APVV |
| Responsible solver: | Prof. Ing. Sládek Ján, DrSc. |
| Duration: | 1.6.2008 – 31.12.2010 |
| LITRATU – Research of light transport through tubular skylights | |
| Výskum prenosu svetla tubusovými svetlovodmi | |
| Program: | APVV |
| Responsible solver: | doc. Ing. Peterková Stanislav, CSc. |
| Duration: | 1.6.2008 – 31.12.2010 |
| Daylight utilization research for improving the energy performance of buildings | |
| Výskum využiteľnosti denného osvetlenia pre zlepšenie energetickej prevádzky budov | |
| Program: | VEGA |
| Responsible solver: | doc. Ing. Peterková Stanislav, CSc. |
| Duration: | 1.1.2008 – 31.12.2010 |
| – | |
| PODKLADY PRE NAVRHOVANIE KONŠTRUKCIÍ NA ÚČINKY ZAŤAŽENIA SNEHOM | |
| Program: | Iné projekty |
| Responsible solver: | Ing. Sadovský Zoltán, DrSc. |
| Annotation: | |
| Project web page: | http://www.telecom.gov.sk/index/index.php?ids=82867 |
| Duration: | 1.3.2010 – 30.11.2010 |
| Parameters determining the moisure buffer value of building hygroscopic materials | |
| Parametre určujúce vlhkostnú tlmiacu hodnotu hygroskopických stavebných materiálov | |
| Program: | VEGA |
| Responsible solver: | prom. fyz. Koronthályová Oľga, CSc. |
| Annotation: | The interaction between indoor climate and indoor hygroscopic surfaces can be characterized and predicted by a new-established parameter – moisture buffer value. The moisture buffer value depends on material parameters: hygroscopic capacity, given by the sorption curve slope in the considered relative humidity range, water vapour permeability as well as on the regime of relative humidity changes, especially its time period.The fact that the sorption isotherm can be more or less hysteretic and the water vapour permeability is function (often non-linear) of moisture content cause that the measured “practical” moisture buffer value can differ from the theoretical one.The project object is to determine the effects of hysteresis and material parameters moisture dependence on the practical moisture buffer value at different relative humidity ranges and at different humidity changes regimes. |
| Duration: | 1.1.2007 – 31.12.2009 |
| Mitigation of failure risk of composite under impact, explosion and kinematic excitation | |
| Znižovanie rizika porušenia kompozitných sústav pri nárazoch, výbuchoch a kinematických budeniach | |
| Program: | VEGA |
| Responsible solver: | Prof.,Ing. Juhásová Emília, DrSc. |
| Annotation: | |
| Duration: | 1.1.2007 – 31.12.2008 |
| Innovative binder based on cement and modified kaolin with high durability and ecological contribution to life environment. | |
| Inovatívne spojivo na báze cementu a upraveného kaolínu s vysokou trvanlivosťou a ekologickým prínosom pre životné prostredie | |
| Program: | VEGA |
| Responsible solver: | RNDr. Krajči Ľudovít, PhD. |
| Duration: | 1.1.2006 – 1.12.2008 |
| Commision of S.G.A. for building industry, architecture, mining and geotechnique | |
| Mechanické a fyzikálne vlastnosti cementových kompozitov s obsahom organického kameniva | |
| Program: | VEGA |
| Responsible solver: | Ing. Križma Martin, PhD. |
| Annotation: | |
| Duration: | 1.1.2006 – 1.12.2008 |
| Numerical and experimental investigation of fracture behaviour of structural elements made from functionality gradient materials | |
| Numerické a experimentálne vyšetrovanie lomových vlastností konštrukcií z funkcionárne gradientných materiálov | |
| Program: | VEGA |
| Responsible solver: | Prof. Ing. Sládek Ján, DrSc. |
| Duration: | 1.1.2006 – 1.12.2008 |
| Optimized bionics structures and materials with behaviour control | |
| Optimálne bionické konštrukcie a materiály s riadeným pôsobením | |
| Program: | VEGA |
| Responsible solver: | Doc. Ing. Tesár Alexander, DrSc. |
| Duration: | 1.1.2006 – 1.12.2008 |
| Synthesis and properties of new inorganic polymer cements based on clay materials and slag | |
| Syntéza a vlastnosti nových anorganických polymérnych cementov založených na ílových materiáloch a troske | |
| Program: | VEGA |
| Responsible solver: | Ing. Živica Vladimír, DrSc. |
| Duration: | 1.1.2006 – 1.12.2008 |
| Behaviour of steel structure containing cracks due to repeated buckling of its thin – walled components | |
| Pôsobenie oceľovej konštrukcie obsahujúcej trhliny následkom opakovaného vybočovania jej tenkostenných častí. | |
| Program: | VEGA |
| Responsible solver: | Ing. Kriváček Jozef, CSc. |
| Duration: | 1.1.2005 – 1.12.2007 |
| Reliability – based optimalization of structuries | |
| Spoľahlivostná optimalizácia konštrukcií | |
| Program: | VEGA |
| Responsible solver: | Ing. Sadovský Zoltán, DrSc. |
| Duration: | 1.1.2005 – 1.12.2007 |
| – – Research of the year – round changes of solar and daylight availability for the computer evaluation of sustainable buildings | |
| Výskum celoročných zmien slnečných a svetelných dostupností pre počítačové posudzovanie trvalo udržateľných budov | |
| Program: | VEGA |
| Responsible solver: | doc. Ing. Peterková Stanislav, CSc. |
| Duration: | 1.1.2005 – 1.12.2007 |
| Research of the daylight conditions in Slovakia for the effective building design on the CIE standards and measurements at Bratislava | |
| Výskum svetelných pomerov na Slovensku pre efektívny návrh budov na základe oblohových normálov CIE a meraní v Bratislave | |
| Program: | Iné projekty |
| Responsible solver: | doc. Ing. Peterková Stanislav, CSc. |
| Duration: | 1.1.2002 – 31.12.2004 |
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| Experimentálna a teoretická analýza sorpcie vodnej pary v stavebných materiáloch | |
| Program: | APVV |
| Responsible solver: | Ing. Matiašovský Peter, CSc. |
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| Multiškálové modelovanie vrstevnatých, vláknami vystužených a poréznych magnetoelektrických materiálov | |
| Program: | SASPRO |
| Responsible solver: | Dr. Ing. Wünsche Michael |