Acta Polytechnica CTU Proceedings. 2022 ( vol. 32-39): Poslední příspěvky
Zobrazují se záznamy 261-280 z 290
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Heat transfer model verification for thermal monitoring system of integral bridges
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Thermal actions considered on abutments of integral bridges by the European standard (Eurocode 1) might be in variety of certain situations underestimated. Based on this assumption, thermal monitoring system has been ... -
Methylene blue test and adsorption capacity of clays
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This article presents results of experimental measurements focused on an ability of clay to adsorb Methylene Blue dye. This adsorption capacity is determined by a methylene blue test. Adsorption capacity could be a specific ... -
Microstructure modification of cement pastes using nanosilica
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The paper describes modifications of cement paste mixtures using nanosilica to affect their physical and chemical properties. Cement pastes from Portland cement CEM I 42.5R with three different substitution ratios of ... -
Enhanced service life of existing infrastructure buildings by use of concrete screw anchors as post-installed shear reinforcement
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)In the last decades, traffic on railways and roads has increased significantly in Central Europe. On the other hand, the existing infrastructure mainly origins from the late 1950s to the 1970s. This applies also for the ... -
High-performance concrete containing waste vitrified tiles
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This contribution deals with the possibility to use waste vitrified tiles (VT) in high-performance concrete. Silica powder normally used in high-performance concrete is replaced by waste vitrified tiles in 25, 50, 75 and ... -
Railway reinforced concrete infrastructure life management and sustainability index
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Infrastructure healthy enhancement for saving resources in operation procedures is one of the most important objectives for owners on their decision support system based on cost management. In this manner, finding the ... -
Influence on permeability and pore structure of polyolefin fiber reinforced concrete containing slag
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The purpose of this study is to assess the mechanical and microscopic properties of concrete containing different dosages of polyolefin fibers and slag through tests of compressive strength, resistivity, water absorption, ... -
Extent of corrosion damage for RC structures exposed to chloride-bearing environment
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)In industrialized countries, most of the reinforced concrete (RC) structures and infrastructures have more than 40 years, since they were built around 1960 − 1980, and were designed for a service life of 50 years. Consequently, ... -
Comparing the environmental performances of new and renovated school buildings
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Evaluating which is the best choice between renovating an existing construction or building a new structure in countries like Italy, where a huge post-war un-listed building heritage does not satisfy the current standards ... -
Innovative strengthening of RC columns using a layer of a fibre reinforced concrete
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Reinforced concrete structures that are influenced by degradation, overloading, the thawing and freezing cycles, abrasive damage and corrosion of reinforcement, should be repaired or strengthened. Each of those mentioned ... -
Properties of concrete using crushed stone powder with various specific surface areas
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Many countries use crushed stone and crushed sand as the aggregate for concrete. However, a large amount of crushed stone powder is produced as by-products in the manufacturing process. Unless effective utilization of ... -
Correlation of porosity and properties of recycled fine aggregate concrete with fly ash
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)In this paper, we presented the experimental discussion of samples of recycled aggregate concrete with replacement of natural fine aggregate by recycled fine aggregate. Three mix kinds were produced and, for each of these ... -
Prestressed ultra-high performance concrete (UHPC) beams for reusable structural systems: design and testing
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)With the aim to reduce the environmental footprint of buildings, this paper presents an original structural system concept for two-way slabs in residential and office buildings. The proposed system extends the best practice ... -
A revival in façades: Textile reinforced concrete panels are light, safe and aesthetically pleasing
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Textile reinforced concrete was developed in recent years into a construction technique that has its benefits and advantages in applications where conventional types of reinforcement have their limits. The current, minimum ... -
Effect of cracks on the service life of RC structures exposed to chlorides
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)To move towards a more sustainable concrete, the enhancement of its durability is strongly encouraged and, dealing in particular with reinforced concrete (RC), this mainly means to prevent the damage due to environmental ... -
Microstructural characterization of high-performance steel fiber reinforced geopolymer concrete
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Due to growing environmental and economic concerns associated with conventional building materials, research interest gravitates towards the development of novel environmentally friendly materials as alternatives to ... -
How design concepts influence carbon footprints of load bearing structures
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)In recent years, it has become essential to consider the total carbon footprint of a construction project. Commonly, the question has been: ’What is the best material to be used in this context?’ In this paper we argue ... -
An experimental study of reinforced concrete beamcolumn joint with partially high strengthened longitudinal bar
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)It is necessary to generate the yield position away from the column face to minimize damage to the beam-column joint during a large earthquake in a reinforced concrete building. The same efficacy can be realized using ... -
Analytical simulation on experimental seismic response of headed anchors embedded in reinforced concrete
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This paper deal with a series of dynamic response analyses, carried out to give numerical correlation of hysteretic behavior of cast-in-place anchorages obtained by the static loading and shake table tests. Specimens for ... -
Sustainable concrete production with recycled concrete wash water beneficiated with CO2
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)A significant amount of wastewater is generated through the cleaning of equipment utilized within the ready mixed concrete production cycle. The reuse of concrete wash water as mix water is limited by the negative material ...