Browsing Ústav fyziky by Author "Pazdera, Luboš"
Now showing items 1-7 of 7
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The Acoustic Emission Parameters Obtained during Three-point Bending Test on Thermal-stressed Concrete Specimens
Topolář, Libor; Kucharczyková, Barbara; Kocáb, Dalibor; Pazdera, Luboš (Elsevier, 2017-06-02)Fire response of concrete structural members depends on thermal, mechanical, and deformation properties of concrete. These properties vary significantly with temperature and also depend on the composition and characteristics ... -
Analysis of Acoustic Emission Signals Recorded during Freeze-Thaw Cycling of Concrete
Topolář, Libor; Kocáb, Dalibor; Pazdera, Luboš; Vymazal, Tomáš (MDPI, 2021-03-05)This manuscript deals with a complex analysis of acoustic emission signals that were recorded during freeze-thaw cycles in test specimens produced from air-entrained concrete. An assessment of the resistance of concrete ... -
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 ... -
Efect of Chemical Aggressive Media on the Flexural Properties of Cured-In-Place Pipes Supported by Microstructure Observation and Acoustic Emission
Hodul, Jakub; Majerová, Jana; Drochytka, Rostislav; Dvořák, Richard; Topolář, Libor; Pazdera, Luboš (MDPI, 2020-07-08)The cured-in-place pipe (CIPP) method is currently the most frequently used approach for the renovation of piping without digging; this technology is suitable for pipes made from all types of material. The authors of this ... -
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 ... -
Nondestructive Testing of Advanced Concrete Structure during Lifetime
Pazdera, Luboš; Topolář, Libor; Smutný, Jaroslav; Timčaková, Kristýna (Hindawi Publishing Corporation, 2015-07-08)The paper reports on measurements and analysis of the measurements during hardening and drying of specimens using selected acoustic nondestructive testing techniques. An integrated approach was created for better understanding ... -
Using acoustic emission methods to monitor cement composites during setting and hardening
Topolář, Libor; Pazdera, Luboš; Kucharczyková, Barbara; Smutný, Jaroslav; Mikulášek, Karel (MDPI AG, 2017-04-28)Cement-based composites belong among the basic building materials used in civil engineering. Their properties are given not only by their composition but also by their behaviour after mixing as well as by the methods of ...