Information Page of SAS Organisation

Institute of Construction and Architecture

International projects

ISIDEL - Integrated Solutions for daylighting and electric lighting
Integrované riešenia pre denné a umelé osvetlenie
Program: IEA
Project leader: doc. Ing. Darula Stanislav CSc.
Annotation:Lighting accounts for about 19% of the total energy consumption. Research in the field of energy savings for lighting includes daylighting, artificial lighting, lighting control and new technologies to meet the needs of building occupants. The trend in research in this area is to integrate daylight, artificial light and their control in dependence on the light availability and building operation requirements. The main areas of the project are: - Facades of buildings and technologies for and daylighting artificial lighting with emphasis on the visual and non-visual needs of human as well as diversity and factors of the international market. The consortium will address the areas of tasks: - A. User perspective and requirements; - B. Integration and optimization of daylight and electric lighting; - C. Design support for practitioners (Tools, Standards, Guidelines); D. Lab and field study performance tracking. The project has the following main objectives: - find out a link between user requirements and energy consumption; - imitation of daylight; user-oriented lighting for high efficiency systems; orientation on the market and lighting and facade industry.
Project web page:http://task61.iea-shc.org/description
Duration: 1.1.2018 - 30.6.2021

PMS - Programa en Estudios Metropolitanos (Metropolitan Studies Programme)
Program metropolitných štúdií
Program: Iné
Project leader: Mgr. Kocifaj Miroslav PhD.
Annotation:Participants: The National Council of Science and Technology and different public research institutes of México: CENTROMET, MORA, CIDESI, INFOTEC, CENTROGEO, COLEF, and CIDE.
Duration: 1.9.2014 -

SkyMeAPP - SkyMeAPP
SkyMe APP
Program: UNESCO
Project leader: Mgr. Kocifaj Miroslav PhD.
Annotation:SkyMeAPP is a citizen science project developed by an international scientific committee and supported by UNESCO and Museo de la Luz, and it is a part of the initiatives to celebrate the proclamation of the International Day of Light 2018. SkyMe APP is an interdisciplinary project that will help to have valuable data to study light pollution and all its consequences. SkyMe is a mobile application that allows the general public to support scientific research on light pollution while generating an approach to this environmental problem and encouraging interest in the various efforts that have been made to date to control this type of pollution worldwide.
Project web page:http://www.skymeapp.com/
Duration: 8.11.2017 -

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: Multilaterálne - iné
Project leader: Prof.Dr.Ing. Palou Martin-Tchingnabé
Annotation:The project deals with the long-term durability of concrete structures in an environment exposed to nuclear radiation. The chemical composition of concrete composites is one of the key factors that significantly influence the aging of concrete (properties) and hence the structural integrity (durability) of concrete and reinforced concrete structures. Current topics that directly affect the operation of nuclear power plants are safety, the lifetime of nuclear power plants (NPP) and the selection of building materials for the construction of new NPP units. In nuclear power plants, concrete is exposed to strong neutron radiation and gamma radiation from an energy generating reactor, and therefore the choice of its components due to their chemical composition must reflect not only the ability to withstand radiation but also other aspects related to the durability of concrete exposed to radiation. The project is a multidisciplinary integrating procedure of numerical simulation of aging of heterogeneous composite materials in ionizing environment; experimental verification based on current knowledge and newly designed aggregates and mineral admixtures as well as design of multi-component cements. The main result of this project is the proposed method of evaluation, which links mechanical and chemical changes of irradiated minerals with long-term durability of concrete structures exposed to radiation. Samples of new concrete composites will be irradiated and the effect of type and intensity of nuclear radiation on mechanical and chemical changes depending on the chemical composition of the concrete components will be investigated. • The main goal of this project, as it follows from the analysis of the current issue, is to find out the relationships between the chemical composition of individual concrete components and the durability of concrete structures in an environment with long-term ionizing radioactive radiation. • Another objective is to assess the impact of chemical, mechanical and physical changes induced by radioactive radiation on the mechanical properties of concrete structures.
Duration: 1.10.2017 - 30.9.2020


National projects

SKYGLOW - Global Characterization of Skyglow
Globálna charakterizácia svetelného znečistenia
Program: APVV
Project leader: Mgr. Kocifaj Miroslav PhD.
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

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
Project leader: Prof. Ing. Sládek Ján DrSc.
Annotation:Scientific base of the structural health monitoring (SHM) systems should be developed to prevent catastrophic failure of structures, decrease maintenance cost and guide construction. The SHM is especially important for high performance structures, where failure would lead to disasters. It requires a real-time monitoring of micro-cracks in structures. Usually piezoelectric materials are utilized in SHM as sensors. Conventional piezoelectric materials contain toxic lead and they have lower thermal stability. Therefore, the goal of the project is to design lead-free piezoelectric metamaterials with a functionality and piezoelectric response comparable to those of lead-oxide based piezoelectrics. While the piezoelectric property is non-zero only for select materials (noncentrosymmetric),the flexoelectricity is in principle non-zero for all materials. Flexoelectricity is a phenomenon widely existing in all dielectric materials. It couples the strain gradient developed in a dielectric material with its polarization. To utilize the flexoelectric effect the strain gradients have to be large and they are generated easily only at the nanoscale. A reliable computational method based on gradient theory has to be developed. Both material parameters higher order elastic and flexoelectric coefficients are determined on the base of atomistic model. The governing equations with the corresponding boundary conditions are derived from the variational principle. The FEM formulation is developed from the governing equations of gradient theory. The C1-continuous elements are applied to guarantee the continuity of variables and their derivatives in the element boundaries. Experimental methods are applied to verify new theoretical and computational approaches in flexoelectricity.
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
Project leader: Mgr. Kocifaj Miroslav PhD.
Duration: 1.4.2019 - 30.6.2021

Metamaterial - Optimal design of micro/nano structures for metamaterials
Optimálny návrh mikro/nano konštrukcii pre metamateriály
Program: APVV
Project leader: Prof. Ing. Sládek Ján DrSc.
Annotation:Advanced metamaterials for health monitoring of structures are analysed in the project for optimal design. The piezoelectric response is observed in metamaterials if large strains are occurred in structures. Large strains are observed mainly in nano-sized structures. The classical continuum mechanics cannot be applied for such structures, since it is indifferent to the material microstructure. The intrinsic limitations of classical elasticity are overcome in advanced continuum models. The nano-sized structures with flexoelectric properties can be analysed successfully. For this purpose, the key task is to determine the higher-order elastic and flexoelectric coefficients in flexoelectric gradient theory. Due to missing experimental methods to obtain these coefficients, a numerical experiments are employed. Unknown flexoelectric coefficient is obtained by fitting the results by gradient theory with microsctructural analysis. Microstructure is not modelled in the gradient theory. The variational principle is applied to derive the governing equations with bearing in mind the constitutive equations leading to both the direct and converse flexoelectricity phenomena. The finite element method (FEM) and meshless formulations are developed to solve problems of flexoelectricity. The mixed FEM is developed in theproject, where the C0 continuous interpolation is applied independently for displacement and displacement gradients. Similarly the electric potential and electric intensity vector are approximated by C0 elements. The kinematic constraints between strains and displacements are satisfied by collocation at some cleverly chosen internal points in elements. The attention is paid also to treatment of surface stress effect important in nano-sized structures. The former elegant mathematical theory incorporating surface stresses in elasticity given by Gurtin and Murdoch is extended here to piezoelectricity.
Duration: 1.7.2019 - 30.6.2023

Study of hydration process and microstructure development in multi-component cementitious binders
Štúdium procesov hydratácie a vývoja mikroštruktúry v mnohozložkových cementových spojivách
Program: VEGA
Project leader: 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
Project leader: Prof.Dr.Ing. Palou Martin-Tchingnabé
Annotation:Chemical composition of concrete constituents is one of the key factors that heavily influences ageing features/properties, thus structural integrity (durability and service-ability) of concrete structures. The current topics of today, which affect directly economies of many countries, are the service life extension of operating nuclear power plants (NPPs), and the selection of building materials for construction of new NPP units. In NPPs, the concrete is exposed to strong neutron and gamma-ray radiation around the energy-generating core, and therefore, the selection of its constituents with respect to their chemical composition needs to reflect the activation limits and other ageing related aspects. The main objective of this project is to assess the effect of radiation-induced mechanical and volumetric changes on structural integrity of concrete structures in irradiated environment. A set of commonly used and newly proposed minerals for concrete aggregate as well as multicomponent cement will be assembled. The most prominent minerals present in concrete will be irradiated and the effect of mechanical and chemical changes on load carrying capacity/performance of the minerals will be investigated. The database comprising the irradiated minerals will be substantially expanded with experiments on non-irradiated minerals under various temperature and humidity regimes. Based on the experimental data, numerical models describing mechanical behavior of the minerals will be used in future structural analyses. The main result of this project is a proposed assessment method which interconnects mechanical and chemical changes of irradiated minerals with long-term performance of concrete structures exposed to radiation.
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
Project leader: 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

Projects total: 11