The list of national projects SAS
Institute of Construction and Architecture
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
| Duration: |
1.1.2024 - 31.12.2027 |
| Program: |
VEGA |
| Project leader: |
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. |
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
| Duration: |
1.1.2024 - 31.12.2027 |
| Program: |
VEGA |
| Project leader: |
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. |
Comprehensive model of light pollution propagation into the ambient environment
Komplexný model šírenia svetelného znečistenia do okolitého prostredia
| Duration: |
1.7.2023 - 30.6.2027 |
| Program: |
SRDA |
| Project leader: |
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. |
Multiphysical effects in micro/nano structural elements in MEMS/NEMS devices
Multifyzikálne efekty v mikro/nano-konštrukčných prvkoch MEMS/NEMS zariadení
| Duration: |
1.1.2024 - 31.12.2027 |
| Program: |
VEGA |
| Project leader: |
Ing. Sátor Ladislav PhD. |
| Annotation: | The global aim of this project is to give a unified theoretical and numerical treatment of the micro/nano plate
and/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 develop
advanced numerical techniques, like the Moving Finite Element Method (MFEM) to solve the rather complex
boundary value problems. The numerical simulation of the effects of functional dependence of material
coefficients in multifield coupling and analyse the size-dependent effects can lead to deeper understanding of
physical processes in response of micro/nano structural plate/beamlike elements. |
Optical characterization of particles in exteriors and interiors
Optická charakterizácia častíc vo vonkajšom a vnútornom prostredí
| Duration: |
1.1.2024 - 31.12.2027 |
| Program: |
VEGA |
| Project leader: |
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. |
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
| Duration: |
1.7.2024 - 30.6.2028 |
| Program: |
SRDA |
| Project leader: |
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. |
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Štúdium vplyvu fyzikálno-mechanických faktorov recyklovaného kameniva na vlastnosti kompozitov konštrukčných betónov s maximalizáciou zníženia dopadu na životné prostredie
| Duration: |
1.1.2025 - 31.12.2025 |
| Program: |
DoktoGrant |
| Project leader: |
Ing. Czirák Peter |
The total number of projects: 7
