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Acta Polytechnica CTU Proceedings
ISSN 2336-5382 · Czech Technical University in Prague · 1,274 articles in the index
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Journal Article
51st and 52nd Conference Foundation Engineering Brno 2023 and 2024
51st and 52nd CONFERENCE FOUNDATION ENGINEERING BRNO 2023 and 2024 The traditional yearly conference of Foundation Engineering Brno is organized by the Czech Geotechnical Society. This is the largest annual event in the field, where researches, academicians, designers, investors and contractors…
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Journal Article
Calibration of the hardening soil model in excalibre
The hardening soil model is one of the most commonly used constitutive models in engineering practice. This model is based on multi-surface plasticity and combines the well-known Mohr-Coulomb failure criterion, a hardening shear surface and a cap yield surface into a single model. The stress-strain…
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Journal Article
Innovative approaches to a solution for surface deformations on earth structures of linear traffic construction
The modification of the slopes of linear transport structures includes humus and grassing which is intended to improve their resistance to erosion. Nevertheless, these slopes are increasingly affected by landslides of the surface layers with the key factors being extreme precipitation fluctuations…
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Journal Article
A geotechnical investigation for an office building in the foothills of the Bohemian Forest
An office building with a partial basement on an undeveloped plot within Polná na Šumave was proposed. The municipality is located on the border of Boletice Military Training Area which had some specific security measures that had to be respected during the investigation. The detailed geotechnical…
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Journal Article
Derivation of soil shear modulus from push and pull tests of micropiles
The article presents a method for earning soil shear modules from the results of micropile loading tests. The micropile is first loaded with a push force and then with a pull force. The shear modules are derived from two graphs of the dependence of micropile displacements on the loading forces. One…
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Journal Article
Effect of tangent and secant elastic constants on CCBO stress evaluation in transversely isotropic rock
The Compact Conical Borehole Over-coring (CCBO) method is employed for the determination of the three-dimensional stress state in rock environments. The method utilises a strain gauge cell to quantify the deformation of over-cored rock, the deformation characteristics of which are evaluated in the…
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Journal Article
Modelling diaphragm walls using a time-dependent elasto-plastic material model
This paper utilizes an advanced time-dependent elastoplastic material model for the modelling of diaphragm walls via the Finite Element Method (FEM). After describing the timedependent behaviour of concrete, the Shotcrete material model is specified, and calibration of the material model in…
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Journal Article
Landslide mapping using drone-based method
The article focuses on the possibilities of landslide mapping using photogrammetric and LiDAR measurements from a drone. The measurements are then evaluated and compared with conventional methods.
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Journal Article
Special foundation of new buildings in Nové Sady Street in Brno
The construction of the TITANIUM building was started in 2008 near the main railway station in Brno, along the left side of Nové Sady Street. This was followed by the southern extension and expansion of the IN SADY building, then the northward extension of the TITANIUM X and CENTROPOLIS buildings…
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Journal Article
An evaluation of primary lining deformation using measurements with FBG sensors during a tunnel excavation
The paper presents an evaluation of data gathered with the FBG (Fiber Bragg Gratings) instrument for primary lining deformation measurement, which was installed into primary lining of adit during construction. The evaluation is related to the initial shape of primary lining, and its deflection…
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Journal Article
Optimization of light-burnt magnesia content in MOC-based construction composites
This study examines the effect of the content of industrial-grade magnesium oxide (MgO-I) powder, which contains various impurities, on the properties of quartz sand-filled MOC composites. Samples were prepared with MgO-I excessive content ranging from 50.0 to 100.0 wt.% relative to the…
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Journal Article
Life cycle assessment of composite concrete columns made of high-performance concrete skin with recycled aggregate concrete core
Concrete and cement production are among the largest industrial sources of CO2 emissions. Reducing their carbon footprint relies on enhancing concrete durability and promoting the use of recycled materials. This study explores a hybrid structural concept combining a high-performance concrete (HPC)…
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Journal Article
Reaction kinetics and early strength development of alkali-activated recycled red-brick composite
Six alkali-activated (AAC) mortars were studied, prepared with ground blast furnace slag (GBFS) and KOH, with sand fully replaced by recycled red brick aggregate (RBA). The raw materials were characterised by X-ray fluorescence, and reaction kinetics were examined using isothermal calorimetry…
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Journal Article
Stabilization of toxic ions with manganese-modified sorbents
In this study, a possible improvement of adsorption properties due to the manganese (Mn) modification was tested on natural zeolites. Modification method consisted of the synproportionation reaction of KMnO4 and (CH3COO)2Mn and deposition of resulting MnOx on the adsorbent surface at elevated…
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Journal Article
Phase composition, microstructure and properties of refractory foams as insulation materials for high-temperature thermal energy storage
High-alumina refractory foams (insulating firebricks) are suitable insulation materials for high-temperature thermal energy storage aggregates. In this contribution we present analytical approaches for estimating the effective properties (density, specific heat, thermal conductivity and elastic…
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Journal Article
The difference in the carbonation process of β and γ dicalcium silicate
The carbonation curing of cementitious materials has received growing attention in recent years, especially in light of efforts to reduce carbon dioxide emissions. It enables the rapid hydration of conventional binders, such as ordinary Portland cement, and also offers great potential for…
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Journal Article
Performance of pumice-lime mortars reinforced with natural fibers
The preservation of cultural heritage structures requires restoration materials that balance historical authenticity with modern performance standards. Lime-based mortars, which are traditionally composed of lime hydrate or hydraulic lime, have long been favoured for their breathability…
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Journal Article
Natural hydraulic lime mortars with goat and bovine hair fibers for sustainable conservation of heritage structures
The natural hydraulic lime-based mortars were modified by the addition of egg albumen and the incorporation of animal hair fibres, specifically goat and bovine, to experimentally assess the influence of natural fibres on their structural, hygric, thermal, and mechanical properties. The primary…
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Journal Article
Properties of cement-based mortars with alternative aggregate
Concrete and all cement-based composites constitute a crucial material base necessary for ensuring modern, fast and intensive constriction. In general, common building composites contain about 70–80 % of filling materials in their volume. Given the gradual depletion of non-renewable resources and…
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Journal Article
Study of processes taking place during carbonation of ladle furnace slag
This work focuses on the study of the processes taking place during the carbonation of ladle furnace slag (LFS). The main phases present in LFS, namely γ-C2S, β-C2S, C4AF, C12A7, and in addition α′-C2S, were first synthesized in a pure form. Afterwards, the carbonation activity was studied for all…
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