Prohlížení Acta Polytechnica CTU Proceedings. 2022, vol. 33 dle názvu
Zobrazují se záznamy 42-61 z 98
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Feasibility experiments of seismic concrete block walls without joint mortar
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The authors developed two types of block systems consisting only of main block and key block without joint mortar in consideration of seismic performance and workability. Two types of block systems have different key block ... -
Fire spalling sensitivity of concrete made with recycled concrete aggregates (RCA)
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The fire spalling of concrete is a complex phenomenon, which can affect the integrity of the structures during a fire. This thermal instability is associated with a complex coupled chemo-thermo-hydro-mechanical mechanism ... -
Forced carbonation of recycled concrete aggregates
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The production of concrete, especially the contained cement clinker, causes a high proportion of the manmade gaseous air pollution. Studies show that the decarbonation of limestone effects roughly 8% of worldwide CO2 ... -
Fracture behavior of multiple adhesive postinstalled anchors subjected to shear force
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)In this study, experiments were conducted on post-installed anchors subjected to shear force in order to enhance applicability when post-installed anchors were used for seismic reinforcement. Furthermore, since there were ... -
Fundamental properties and durability of slope protection spray mortar reinforced with bamboo fibers
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)In order to enhance resistance against cracking and durability, short fibers such as steel and organic fibers have been conventionally mixed into spray mortar used for slope protection. In this research, fundamental ... -
Glued timber concrete composite walls using ultra-high-performance concrete
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)This paper gives a short introduction of the development of cross laminated timber (CLT) concrete composite walls with a glued connection. In the composite walls, prefabricated ultra-high-performance concrete (UHPC) lamellas ... -
High thermal conductivity concrete for energy piles
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Research is increasingly focusing on thermal properties of concrete with the aim of reducing the heat exchange between buildings and environment. On the other hand, concretes with high thermal conductivity could have ... -
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 ... -
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 ... -
Improvement mechanism of recycled concrete using C-S-H type accelerator and modifying recycled aggregate by carbonation technology
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)In Japan, there is concern that concrete blocks due to demolition will increase with the renewal of concrete structures. Although it has been used for roadbed materials as recycling, in recent years, aggregates are removed ... -
Influence of steel fibers on the fatigue behavior of high-performance concretes under cyclic loading
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Due to the advancement of high-performance concretes, the development of filigree constructions has been improved in the last decades. However, as the demand to create more filigree designs increases, the vulnerability to ... -
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, ... -
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 ... -
Interfacial bond behavior of adhesively-bonded timber/cast in situ concrete (wet bond process)
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The goal of this research was to study the strength of the interfacial bond between cast-in-situ concrete and engineered timber (cross-laminated timber (CLT)). Double lap specimens were manufactured using fresh concrete ... -
Lateral load bearing characteristics of light gauge steel and lightweight concrete shear walls
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)In China, there is a new structural system named light gauge steel and lightweight concrete (LSLC) structure, which used lightweight concrete as structural material in composite way with cold-formed steel. Here, the shear ... -
Life cycle assessment of carbon concrete composites: a circular economy path beyond climate mitigation?
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Sustainable construction and materials play an ever-important role to stay within our planetary boundaries. In support, innovative carbon concrete composites (CCC) promise significant raw material savings by integral design. ... -
Life cycle management of concrete structures based on sustainability indicators
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)A concrete structure should be sufficiently planned, designed, executed and maintained to ensure its requirements during the life cycle. However, structures suffering from serious deterioration in structural members and ... -
Limitations of life cycle assessment of green concretes - a state-of-the-art review
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)There have been numerous researches focusing on the alternatives to conventional concrete regarding environmental benefits and trade-offs. For this purpose, nowadays, the Life Cycle Assessment (LCA) is widely used. Until ... -
Load transfer mechanism of concrete screws
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)Even though the market and development for concrete screws has been increasingly rising in recent years, the load transfer mechanism of concrete screws has not yet been fully investigated. Therefore, different tests of ... -
Long span post-tensioned box girder bridge in Bratislava
(České vysoké učení technické v PrazeCzech Technical University in Prague, 2022)The paper describes an analysis and detailed design of the 470 m long D4 motorway bridge in the Slovak capital Bratislava. This bridge is a part of 2 932.50 m long D4 motorway crossing of the Danube River and its surrounding ...