• Quality Control of the Anchoring of Steel Bridge Barriers by Non-Destructive Testing 

  Komárková, Tereza; Láník, Jaromír; Anton, Ondřej (MDPI, 2020-01-07)

  Traffic barriers represent one of the basic road safety features. There are several types of traffic barriers based on the material from which they are made of and their location. Bridge structures are usually fitted with ...

• Characteristic Curve and Its Use in Determining the Compressive Strength of Concrete by the Rebound Hammer Test 

  Kocáb, Dalibor; Misák, Petr; Cikrle, Petr (MDPI, 2019-08-23)

  During the construction of concrete structures, it is often useful to know compressive strength at an early age. This is an amount of strength required for the safe removal of formwork, also known as stripping strength. ...

• 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 ...

• 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. ...

• Cost-Effective High-Performance Concrete: Experimental Analysis on Shrinkage 

  Kucharczyková, Barbara; Kocáb, Dalibor; Daněk, Petr; Terzijski, Ivailo (MDPI, 2019-08-26)

  This paper focuses on the experimental determination of the shrinkage process in Self-Compacting High-Performance Concrete (SCC HPC) exposed to dry air and autogenous conditions. Special molds with dimensions of 100 mm × ...

• 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 ...

• Detection of reinforcement in the non-traditional building structures - historical statues 

  Anton, Ondřej; Vítek, Lubomír; Heřmánková, Věra; Komárková, Tereza; Cikrle, Petr (IOP Publishing, 2018-07-16)

  During restoration and maintenance of historical buildings, statues and sculptures are often neglected elements in the pre-construction condition surveys, especially in case they are not part of the supporting structure ...

• Experimental Analysis of the Development of Elastic Properties and Strength under Different Ambient Temperature During the Hardening of Concrete 

  Kocáb, Dalibor; Daněk, Petr; Misák, Petr; Topolář, Libor; Pőssl, Petr (Elsevier, 2017-07-20)

  This paper focuses on the experimental assessment of the degree to which continued exposure to low ambient temperatures influences the concrete modulus of elasticity and compressive strength. The elastic modulus is not a ...

• 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 ...

• Influence of freeze-thaw cycles on fracture parameters values of lightweight concrete 

  Kucharczyková, Barbara; Keršner, Zbyněk; Pospíchal, Ondřej; Misák, Petr; Vymazal, Tomáš (Elsevier Ltd., 2010-06-06)

  Freezing and thawing resistance is very important characteristic also in the case of lightweight concrete. The paper deals with the influence of periodic freeze-thaw cycles on lightweight concrete fracture parameters values. ...

• Methodology for the quantification of concrete sustainability 

  Teplý, Břetislav; Vymazal, Tomáš; Rovnaníková, Pavla (EDP Sciences, 2018-06-26)

  LCA is a method that evaluates the life cycle of a structure from the point of view of its impact on the environment. Consideration is given also to energy and raw material costs, as well as to environmental impact throughout ...

• 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 ...

• Study of a different carbonation intensity on the internal surface of cracks and inside concretes with dense aggregate and concrete recyclate 

  Stehlík, Michal; Knapová, Jana; Mácová, Petra (IOP Publishing, 2018-07-16)

  The paper focuses on the experimental physical-chemical analysis of different carbonation intensity by TG/DTG and FTIR method on the selected surfaces of concretes with aggregate and with concrete recyclate, with and without ...

• Destructive and non-destructive assessment of the frost resistance of concrete with different aggregate 

  Kocáb, Dalibor; Kucharczyková, Barbara; Daněk, Petr; Vymazal, Tomáš; Hanuš, Petr; Halamová, Romana (IOP Publishing, 2018-07-12)

  The paper focuses on determining the frost resistance of concrete using selected destructive and non-destructive test methods. The experiment was performed with four specially made concretes, which differed only in 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 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 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 bond strength by pull-off and direct tensile strength of concrete damaged by elevated temperatures 

  Rozsypalová, Iva; Daněk, Petr; Karel, Ondřej (IOP Publishing, 2018-07-16)

  This paper presents the results of an experimental study of selected characteristics of concrete following its exposure to high temperatures. The monitored parameter was the influence of high temperatures on the bond ...

• Differences in the accuracy of test methods in the field of testing aggregate and determination of their causes 

  Uxa, René; Vymazal, Tomáš (IOP Publishing, 2018-07-16)

  The article is based on the authors’ many years of experience in providing laboratory proficiency testing including organization of proficiency testing by interlaboratory comparison. In the introduction are compared the ...

• Early-age behaviour of cement-based self-leveling flooring compounds 

  Kucharczyková, Barbara; Kocáb, Dalibor (IOP Publishing, 2018-07-16)

  The article deals with the cement-based flooring compounds, especially with the behaviour during the early solidification process. A touch-less laser sensor and a cone-shaped mould were used for the measurement of the ...

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