Browsing by Author "Šimonová, Hana"
Now showing items 1-17 of 17
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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 ... -
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 ... -
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 ... -
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. ... -
Numerical study of thin HPC overlay for orthotropic bridge deck
Miarka, PetrDiplomová práce porovnává tři různé betonové směsi pro celkové ztužení ortotropní mostovky a zkoumá jejich vliv na redukci napětí ve zvoleném svarovém přípoji. Práce uvažuje se standartní zatěžovací situaci mostu, ale také ... -
Pilot evaluation of a fracture process zone in a modified compact tension specimen by X-ray tomography
Klon, Jiří; Seitl, Stanislav; Šimonová, Hana; Keršner, Zbyněk; Kumpová, Ivana; Vavřík, Daniel (Italian Group of Fracture, 2017-10-03)In the case of quasi-brittle material, there is a zone of non-linear behaving material, near the crack tip. A major part of this zone forms a so-called fracture process zone (FPZ), where mechanisms of material toughening ... -
Shrinkage, weight loss and fracture parameters of selected polymer-modified cement mortars during ageing
Kucharczyková, Barbara; Šimonová, Hana; Keršner, Zbyněk; Kocáb, Dalibor (VŠB – Technical University of Ostrava, 2017-06-01)Results of pilot experiments focused on monitoring of shrinkage, weight loss and mechanical fracture properties of two selected polymer-modified cement mortars (PCM) during their aging are presented in the paper. Comparison ... -
Stanovení únavových charakteristik betonu s využitím lomově-mechanických parametrů
Šimonová, HanaPředmětem disertační práce je problematika stanovení únavových charakteristik vybraných cementových kompozitů. Nejprve se uvádí historie únavy kovů, jsou objasněny některé základní pojmy. Součástí práce je shrnutí dosavadního ... -
Tentative Characterization of Old Structural Concrete through Mechanical Fracture Parameters
Šimonová, Hana; Daněk, Petr; Frantík, Petr; Keršner, Zbyněk; Veselý, Václav (Elsevier, 2017-06-02)Structural concrete of the building of Vítkovice railway station from 1970s is characterized via mechanical fracture parameters. In this paper, six core-drilled cylindrical specimens with diameter of 75 mm were provided ... -
Vyhodnocení lomově-mechanických parametrů betonu po vystavení vysokým teplotám
Bejček, MichalDiplomová práce se zabývá vyhodnocením vybraných lomově-mechanických parametrů betonu, který byl vystaven vysokým teplotám (požáru). V úvodní teoretické části jsou shrnuty obecné principy lomové mechaniky s důrazem na ...