Prohlížení Acta Polytechnica CTU Proceedings. 2022, vol. 33 dle názvu
Zobrazují se záznamy 73-92 z 98
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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. ... -
Sustainability of concrete pavements considering traffic and de-icing agents
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)In concrete pavements, special conditions, that increase the likeliness of damaging reactions, as for example an alkali-silica reaction (ASR), prevail. Especially to the superposition of microstructural degradation caused ... -
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 ... -
Technical effectiveness of cement-based mortar for high-reflective building envelope through building energy simulations: preliminary results
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)In areas with high levels of solar radiation, decreasing the amount of solar energy absorbed by the building envelope is useful to reduce the need of air conditioning and "heat island" effects. Most high-reflective products, ... -
Tensile behavior of newly developed undercut anchor in cracked and uncracked concrete
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The authors have been designing a post-installed anchor that fixes itself into concrete material by expanding the anchor tip in an upward direction, and conducted tensile loading tests to confirm its fundamental dynamic ... -
The role of conceptualization in the evaluation of sustainable concrete
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Improvement of the sustainability of concrete materials will be realized through the development of analytical tools that facilitate sustainable design and evaluation. However, these processes may be dependent on how ... -
The status of sustainable concrete codes in the United States
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)As the focus on embodied carbon within the built environment has grown in the U.S., local jurisdictional codes have increasingly proposed and implemented code language that requires the use of concrete mixtures that have ... -
Thin concrete overlays wit carbon reinforcement on deteriorated concrete pavements
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)In many countries, concrete pavements are normally built as Jointed Plain Concrete Pavements. Due to a lack of alternatives, repairing deteriorated concrete pavements usually requires the replacement of the complete pavement ...