Browsing Ústav fyziky by Author "Hoduláková, Michaela"
Now showing items 1-7 of 7
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Analysis of temperature degraded concrete at high temperature by applying of non-linear characteristics
Pazdera, Luboš; Topolář, Libor; Hoduláková, Michaela; Dvořák, Richard; Mikulášek, Karel (IOP Publishing, 2018-07-12)Concrete structures are commonly exposed to thermal loads as a result of the structure, ambient conditions, the heat of hydration, or exposure to fire. Therefore, there has been a growing interest in the research of advanced ... -
The Application of Acoustic Emission Technique to Monitor the Early Setting Process of Cement Pastes
Hoduláková, Michaela; Topolář, Libor; Kucharczyková, Barbara (EDP Sciences, 2019-12-12)The obtained physico-mechanical properties (mainly flexural and compressive strength) of cement-based composite materials depend on various factors (type of mixture, its composition, standard hardening process, proper ... -
The Assessment of Cement Mortars after Thermal Degradation by Acoustic Non-destructive Methods
Topolář, Libor; Štefková, Daniela; Hoduláková, Michaela (IOP Publishing, 2017-10-25)Thanks, the terrorist attacks on the worldwide interest in the design of structures for fire greatly increased. One of the advantages of concrete over other building materials is its inherent fire-resistive properties. The ... -
The Effect of Specimen Size on Acoustic Emission Parameters and Approximate Position of Defects Obtained during Destructive Testing of Cementitious and Alkali-Activated Degraded Fine-Grained Materials
Topolář, Libor; Kocáb, Dalibor; Hrubý, Petr; Jakubka, Luboš; Hoduláková, Michaela; Halamová, Romana (MDPI, 2023-05-04)Two sizes of test samples were selected to investigate the effect of size on the level of degradation. The smaller test specimens had dimensions of 40 × 40 × 160 mm, and the larger ones had dimensions of 100 × 100 × 400 ... -
The experimental comparison of parameters signals of acoustic emission during destructive test on composites based on cement
Hoduláková, Michaela; Kocáb, Dalibor; Topolář, Libor; Kucharczyková, Barbara (MATEC Web of Conferences, 2018-10-29)The paper reports the analysis of acoustic emission signals captured during compressive strength tests of fine-grained cement-based composites of various composition. Acoustic emission monitoring belongs to a non-invasive ... -
Flexure response of thermal loaded concrete specimens by acoustic emission method
Pazdera, Luboš; Topolář, Libor; Mikulášek, Karel; Smutný, Jaroslav; Hoduláková, Michaela; Chobola, Zdeněk; Seelmann, Herbert (EDP Sciences – Web of Conferences, 2017-05-24)The response to fire of concrete structural members depends on the thermal, mechanical, and deformation properties of concrete. These properties vary significantly with temperature depending on the composition and ... -
The use of the acoustic emission method for the monitoring of changes in the internal structure of polymer-cement mortars when testing the static compressive modulus of elasticity
Kocáb, Dalibor; Topolář, Libor; Kucharczyková, Barbara; Hoduláková, Michaela; Daněk, Petr (EDP Sciences – Web of Conferences, 2017-05-24)The paper focuses on the experimental determination of the dynamic and static compressive modulus of elasticity of selected polymer-cement mortars and their comparison. The dynamic modulus of elasticity was determined by ...