Browsing Ústav fyziky by Author "Schmid, Pavel"
Now showing items 1-9 of 9
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Effect of carbon nanotubes on the mechanical fracture properties of fly ash geopolymer
Rovnaník, Pavel; Šimonová, Hana; Topolář, Libor; Schmid, Pavel; Keršner, Zbyněk (Elsevier, 2016-06-01)Fly ash geopolymer is amorphous aluminosilicate material which is considered as alternative to Portland cement concrete. One of the limiting factors of its utilization is an increased shrinkage and related deterioration ... -
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 ... -
Electrical and Self-Sensing Properties of Alkali-Activated Slag Composite with Graphite Filler
Rovnaník, Pavel; Kusák, Ivo; Bayer, Patrik; Schmid, Pavel; Fiala, Lukáš (MDPI, 2019-05-16)The electrical properties of concrete are gaining their importance for the application in building construction. In this study, graphite powder was added to alkali-activated slag mortar as an electrically conductive filler ... -
Experimental evaluation of the effect of carbon fibres on acoustic emission parameters obtained during compressive strength tests of alkaliactivated slag composites
Topolář, Libor; Rovnaník, Pavel; Schmid, Pavel (IOP Publishing, 2018-07-12)The generation of acoustic emission signals is directly associated with formation of cracks in materials during loading. This paper deals with possibilities of acoustic emission method application as the tool for the ... -
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 ... -
Properties of concrete intended for further testing measured by the Impact-Echo and the ultrasonic pulse method
Karel, Ondřej; Dvořák, Richard; Rozsypalová, Iva; Schmid, Pavel (IOP Publishing, 2018-07-16)The aim of the paper is non-destructive measurement of differently degraded specimens by high temperature intended for further testing of joints of stainless steel helical reinforcement glued into the groove and differently ... -
Self-sensing performance of metakaolin geopolymer with carbon nanotubes subjected to repeated compressive loading
Mizerová, Cecílie; Rovnaník, Pavel; Kusák, Ivo; Schmid, Pavel (IOP Publishing, 2021-12-21)Alkaline activated binders showing enhanced piezoresistive properties have recently attracted increased interest in research of their application in smart self-sensing components. This study is focused on metakaolin ... -
Self-Sensing Properties of Fly Ash Geopolymer Doped with Carbon Black under Compression
Mizerová, Cecílie; Kusák, Ivo; Topolář, Libor; Schmid, Pavel; Rovnaník, Pavel (MDPI, 2021-08-04)The development of smart materials is a basic prerequisite for the development of new tech-nologies enabling the continuous non-destructive diagnostic analysis of building structures. Within this framework, the piezoresistive ... -
Testing the Influence of the Material Bonding System on the Bond Strength of Large-Format Tiles Installed on Concrete Substrate under Mechanical Loading
Topolář, Libor; Kocáb, Dalibor; Šlanhof, Jiří; Schmid, Pavel; Daněk, Petr; Nováček, Jaroslav (MDPI, 2020-07-17)The paper describes an experiment focusing on the way the material system influences the bond strength of large-format tiles installed on concrete substrate during mechanical loading under conditions that correspond to ...