Prohlížení Acta Polytechnica CTU Proceedings. 2022, vol. 33 dle názvu
Zobrazují se záznamy 66-85 z 98
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Natural fiber-reinforced light-weight cement blocks prepared from waste for sustainable development
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Low density of the light-weight cement blocks offers an advantage in terms of dead load reduction, which is advantageous in structural design-reduction of size and numbers of load-carrying structural components is possible. ... -
Optimizing the acid resistance of concrete with granulated blast-furnace slag
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Concrete structures exposed to high levels of chemical attacks are assigned to exposure class XA3, which recommends separate concrete protection or a special expert solution to ensure durability. Due to the partial ... -
Parapet structure from special shaped TRC blocks
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The paper describes innovative parapet solution based on special shaped blocks made form textile-reinforced concrete - TRC. The blocks are designed for a placement at the parapet of building with a flat roof. The solution ... -
Physical properties of portland cement based concrete exposed at a depth of 3520 m in the Nankai Trough
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Concrete is widely used in large-scale construction of submarine infrastructure because of its high strength, durability, and ease of handling. However, knowledge of its durability in deep seawater is lacking. In the deep ... -
Predicting leakage of the VERCORS mock-up and concrete containment buildings - a digital twin approach
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)EDF operates a nuclear power generation fleet made up of 56 reactors. This fleet contains 24 reactors designed as double-walled concrete containment building. The inner concrete containment vessel has no metallic liner and ... -
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 ... -
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 ... -
Quantifying uncertainties in the sustainability evaluation of concrete materials considering regional characteristics in Japan
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)In the evaluation of concrete sustainability, what constitutes "sustainable" to one region may vary from another. This often leads to methodological forms of uncertainties that makes the evaluation process more complex. ... -
Quantitative analysis of the strength generating C-S-H-phase in concrete by IR-spectroscopy
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The C-S-H-phase is the most important strength generating phase in concrete and other cementitious materials. The analysis of C-S-H is therefore an important instrument of innovations in the field of concrete and its ... -
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 ... -
Rational and sustainable procedure in the design of bridges using pre-stressed concrete beams a theoretical practical method
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Currently there is not a direct procedure for the design of this bridge system, the procedure is still based on trial and error, there are no studies that give us both the optimum number of beams and other characteristics ... -
RC deck - stiffened arch existing bridges: simulated design and structural analysis
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The 20th century is known as the age that gave birth to the largest reinforced concrete structures. Many applications of this new material were realized at that time, both from a theoretical and practical point of view. ... -
Reduction of dissolved oxygen in minimizing corrosion
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Concrete structures are susceptible to corrosion especially when exposed to marine environment. In order to minimize the corrosion in reinforced concrete, reduction of dissolved Oxygen (DO) in mixing water is recommended. ... -
Research focused on low carbonation of concrete under old cement-based render
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)In-situ research and laboratory study of the concrete of old bridges shows that despite the low strength classes of concrete and the long time of exposure to CO2, it is possible to moderate the depth of their carbonation. ... -
Stability of concrete containing blast-furnace slag following exposure to cyclic elevated temperature
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Concrete is widely used in constructions such as industrial floors or airducts in steel- and casting industry where it is often exposed to long-term or cyclic elevated temperatures. For these applications, thermal stability ... -
Stainless steel-FRCM system for strengthening of RC beams: towards a sustainable strengthening technique
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Fabric-Reinforced Cementitious Matrix (FRCM) systems for strengthening concrete structures are an alternative to traditional techniques. The FRCM system is a composite material consisting of two or more layers of cement-based ... -
Strength and durability characteristics of self compacting concrete (SCC) with recycled aggregate and manufactured sand
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The investigations on self compacting concrete (SCC) with recycled coarse aggregate and Manufactured sand (M-Sand) were performed in this current study. The SCC mixtures were produced with the recycled coarse aggregate of ... -
Structural flexural strengthening through material bonded to the concrete substrate
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This article proposes an alternative method for the structural design of reinforced concrete elements strengthened in bending by metallic plates or fiber-reinforced polymer (FRP) bonded to the concrete substrate. It is ... -
Study for re-ASR behaviour of recycled concrete using ASR generated concrete and considering countermeasure technology
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)It is predicted that the concrete volume to be discarded will increase due to the renewal of the concrete structures and the increase in the returned concrete from construction site. The use of this concrete block as ... -
Suggestion of ultimate strength formulas of partial frame pile cap composed of exterior column, foundation beam and pile
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Currently, there is no research and few valid experiments of pile caps. And shear failure mechanism of a pile, exterior column and foundation beam and pile caps in RC structure is not resolved yet under bi-lateral loading. ...