Browsing by Author "Šimonová, Hana"
Now showing items 1-20 of 31
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Analýza betonového potrubí s využitím lomově-mechanických modelů
Bejček, MichalBakalářská práce se zabývá analýzou potrubí z prostého betonu s ohledem na problematiku navrhování. V úvodní části je obecně popsáno betonové potrubí včetně požadavků stanovených normami. Dále jsou shrnuty metody výpočtu ... -
Analýza objemových změn vybraných silikátových kompozitů
Kubeš, PavelTato diplomová práce se zabývá analýzou objemových změn vybraných silikátových kompozitů. V první části je představena problematika objemových změn betonu se zaměřením na smršťování, dále jsou představeny dva vybrané modely ... -
Complex multilevel fracture tests of concrete: basic mechanical fracture parameters of standard size specimens.
Lehký, David; Šimonová, Hana; Kucharczyková, Barbara; Daněk, Petr (EDP Sciences, 2020-10-05)The aim of the current research is to develop a complex multilevel approach for experimental–computational determination of mechanical fracture parameters of concrete as a typical quasi-brittle material. This includes ... -
Components of the Fracture Response of Alkali-Activated Slag Composites with Steel Microfibers
Šimonová, Hana; Frantík, Petr; Keršner, Zbyněk; Schmid, Pavel; Rovnaník, Pavel (MDPI, 2019-05-16)Knowledge of the mechanical and primarily fracture parameters of composites with a brittle matrix is essential for the quantification of their resistance to crack initiation and growth, and also for the specification of ... -
Development of shrinkage and fracture parameters in selected fine-grained cement-based composites
Kucharczyková, Barbara; Šimonová, Hana; Misák, Petr; Keršner, Zbyněk (EDP Sciences – Web of Conferences, 2017-05-24)The paper summarizes results of a pilot study aimed at the evaluation of an experimental investigation focused on determination of the material characteristics development of selected fine-grained cement-based composites ... -
Effect of curing environment on length changes of alkali-activated slag/cement kiln by-pass dust mixtures
Bílek, Vlastimil; Kalina, Lukáš; Šimonová, Hana (IOP Publishing, 2019-08-14)This paper investigates the combination of commonly used blast furnace slag (BFS) and quite non-traditional cement kiln by-pass dust (BD) for the preparation of alkali-activated binder. More specifically, the possibilities ... -
Effect of steel fibres dosage in alkali-activated slag mortars on acoustic emission obtained during three-point bending tests
Topolář, Libor; Šimonová, Hana; Schmid, Pavel; Rovnaník, Pavel (EDP Sciences – Web of Conferences, 2017-05-24)The acoustic emission phenomenon is directly associated with nucleation of cracks in structural materials during loading. This paper analyses acoustic emission signals captured during three-point bending fracture tests of ... -
Evaluation of Shrinkage, Mass Changes and Fracture Properties of Fine-aggregate Cement-based Composites during Ageing
Kucharczyková, Barbara; Šimonová, Hana; Keršner, Zbyněk; Daněk, Petr; Kocáb, Dalibor; Misák, Petr; Pőssl, Petr (Elsevier, 2017-06-02)The paper deals with the experimental determination of relative length changes development during cement based composite ageing. Special moulds with the dimensions 100 × 60 × 1000 mm were used for the measurements. These ... -
Experimental and numerical analysis of the fracture response of alkali-activated slag-based materials
Lipowczan, Martin; Lehký, David; Šimonová, Hana; Kucharczyková, Barbara (EDP Sciences, 2020-10-05)The paper deals with the experimental and numerical determination of mechanical fracture parameters of fine-grained composites based on the alkali-activated slag (AAS) at different ages of hardening. Two AAS composites, ... -
Fracture parameters of concrete after exposure to high temperatures: pilot tests
Šimonová, Hana; Halfar, Petr; Rozsypalová, Iva; Daněk, Petr; Keršner, Zbyněk (EDP Sciences, 2017-05-24)Experimental concrete panels were after an appropriate aging time loaded by high temperatures (550, 600, 800 and 1000 °C) in a furnace intended for fire tests of building materials. These panels were heated according to ... -
Fracture parameters of fine-grained composites based on the alkali-activated slag
Bílek, Vlastimil; Kucharczyková, Barbara; Šimonová, Hana; Kocáb, Dalibor; Keršner, Zbyněk (IOP Publishing, 2018-07-12)The paper deals with the experimental determination of fracture parameters of the composites based on the alkali-activated slag (AAS) at different ages. The main aim of the experimental investigation was to verify the ... -
Fracture properties of concrete specimens made from alkali activated binders.
Šimonová, Hana; Kucharczyková, Barbara; Topolář, Libor; Bílek, Vlastimil; Keršner, Zbyněk (IOP Publishing, 2017-09-15)The aim of this paper is to quantify crack initiation and other fracture properties – effective fracture toughness and specific fracture energy – of two types of concrete with an alkali activated binder. The beam specimens ... -
Fracture response of alkali-activated slag mortars reinforced by carbon fibres
Šimonová, Hana; Topolář, Libor; Schmid, Pavel; Keršner, Zbyněk; Rovnaník, Pavel (IOP Publishing, 2018-07-12)The paper reports a study of the effect of carbon fibres on the mechanical fracture parameters of alkali-activated slag mortars. The carbon fibres were added in the amount of 1, 2 and 3%, respectively with respect to the ... -
The influence of fibre pre-treatment on the mechanical properties of the geopolymer composites
Korniejenko, Kinga; Figiela, Beata; Šimonová, Hana; Kucharczyková, Barbara; Duarte Guigou, Martin; Lach, Michal (EDP Sciences, 2020-10-14)This article aims to analyse the long-term influence of the pretreatment method on mechanical properties such as the compressive strength of geopolymer composites reinforced with short natural fibres (length of around 5 ... -
Mechanical Fracture and Fatigue Characteristics of Fine-Grained Composite Based on Sodium Hydroxide-Activated Slag Cured under High Relative Humidity
Šimonová, Hana; Kucharczyková, Barbara; Bílek, Vlastimil; Malíková, Lucie; Miarka, Petr; Lipowczan, Martin (MDPI, 2021-01-08)A typical example of an alternative binder to commonly used Portland cement is alkali-activated binders that have high potential as a part of a toolkit for sustainable construction materials. One group of these materials ... -
Mechanical fracture characterization of alkali-activated slag mortars with standardized and natural sand
Šimonová, Hana; Kucharczyková, Barbara; Bílek, Vlastimil; Kocáb, Dalibor (EDP Sciences, 2020-03-05)This paper is focused on the development of the physical, mechanical and fracture characteristics of alkali-activated slag (AAS) mortars during ageing. The two AAS mortars were selected for the purpose of the experiment. ... -
Mechanical Properties of Short Polymer Fiber-Reinforced Geopolymer Composites
Korniejenko, Kinga; Wei-Ting, Lin; Šimonová, Hana (MDPI, 2020-09-01)The article describes the state of the art in reinforced geopolymers, taking into consideration various types of polymer fiber reinforcements, such as polypropylene, polyethylene, or polylactic acid. The description is ... -
Mixed-mode crack propagation in a semi-circular disc under bending made of an environmental-friendly concrete
Malíková, Lucie; Miarka, Petr; Šimonová, Hana (Elsevier, 2020-12-01)The paper is devoted to investigations on the crack deflection angle under mixed-mode loading conditions. Several semi-circular disc configurations with an inclined crack under three-point bending are suggested and its ... -
Modelling of interfacial transition zone effect on resistance to crack propagation in fine-grained cement-based composites
Šimonová, Hana; Vyhlídal, Michal; Kucharczyková, Barbara; Bayer, Patrik; Keršner, Zbyněk; Malíková, Lucie; Klusák, Jan (Italian Group of Fracture, 2017-07-03)In this paper, the attention is paid to investigation of the importance of the interfacial transition zone (ITZ) in selected fine-grained cement-based composites for the global fracture behaviour. This is a region of cement ... -
Multi-parameter fracture mechanics: crack path in a mixed-mode specimen
Malíková, Lucie; Šimonová, Hana; Kucharczyková, Barbara; Miarka, Petr (Gruppo Italiano Frattura, 2019-07-02)A mixed-mode geometry has been chosen to investigate a crack propagation using the multi-parameter fracture mechanics concept. The socalled Williams’ series expansion is used for the crack-tip stress field approximation. ...