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Procházení Ústav chemie dle data publikování

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  • How Reliable is the Durability of RC Structures? 

    Teplý, Břetislav; Rovnaník, Pavel; Keršner, Zbyněk; Rovnaníková, Pavla (Czech Technical University in Prague, 2004-12-01)
    The goal of this paper is to show some trends and time profiles of the reliability index relevant to the Serviceability Limit State considering the design service life of RC structures.
  • Ecotoxicological Assessment of Sediment Leachates of Small Watercourses in the Brno City Suburban Area (South Moravia, Czech Republic) 

    Beklová, Miroslava; Čelechovská, Olga; Dobšíková, Radka; Haluzová, Ivana; Králová, Helena; Malá, Jitka; Modrá, Helena; Ostrá, Magdalena; Svobodová, Zdeňka (University of Veterinary and Pharmaceutical Sciences in Brno, 2010-03-01)
    Sediments of two small watercourses Leskava and Troubsky Brook in the Brno city suburban area were examined for their ecotoxicity. Using a standard procedure, extracts of the sediments were prepared for diagnostic tests. ...
  • Optical performance of colored crystalline solar cells for building energy efficient application 

    Čekon, Miroslav; Rovnaník, Pavel (Elsevier, 2015-10-17)
    The optical properties of building materials belong to the features that are currently taken into account more frequently. There are various reasons for dealing with those parameters. Some of them aim to achieve specific ...
  • 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 polyethylene glycol addition on metakaolin-based geopolymer 

    Mikhailova, Olesia; Rovnaník, Pavel (Elsevier, 2016-06-01)
    Polyethylene glycol is a non-toxic water soluble polymer often used in many industrial applications. The aim of this paper is to study the effect of polyethylene glycol with relative molecular weight ranging between 400–20000 ...
  • Thermal behaviour of metakaolin/fly ash geopolymers with chamotte aggregate 

    Rovnaník, Pavel; Halasová, Kristýna (MDPI, 2016-06-30)
    Geopolymers are generally appreciated for their good resistance against high temperatures. This paper compares the influence of thermal treatment with temperatures ranging from 200–1200 °C on the mechanical properties and ...
  • Blended alkali-activated fly ash / brick powder materials 

    Rovnaník, Pavel; Řezník, Bohuslav; Rovnaníková, Pavla (Elsevier, 2016-08-08)
    Aluminosilicate materials can be transformed into very compact binding material by the process called alkaline activation. The paper presents results of alkaline activation of fly ash and waste fine-grained brick body. ...
  • Immobilization of Heavy Metals in Natural Zeolite-blended Cement Pastes 

    Vyšvařil, Martin; Bayer, Patrik (Elsevier, 2016-09-26)
    This paper deals with the investigation of efficiency of natural zeolite-blended cement pastes for the immobilization of heavy metals. Natural zeolite was used to partially replace ordinary Portland cement (OPC) at rates ...
  • 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 ...
  • 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 ...
  • Effect of chitosan ethers on fresh state properties of lime mortars 

    Vyšvařil, Martin; Žižlavský, Tomáš (IOP Publishing, 2017-10-25)
    The fresh state properties of mortars are eminently important since determine the material workability and also have a great influence on its hardened state characteristics. In this paper, the behaviour of fresh lime mortars ...
  • Electrical properties of alkali-activated slag composite with combined graphite/CNT filler 

    Rovnaník, Pavel; Míková, Maria; Kusák, Ivo (IOP Publishing Ltd., 2017-10-25)
    Alkali-activated industrial by-products such as blast furnace slag are known to possess properties which are comparable to or even better than those observed for ordinary Portland cement. The combination of alkali-activated ...
  • Ternary binder based plasters with improved thermal insulating ability 

    Čáchová, Monika; Koňáková, Dana; Vejmelková, Eva; Vyšvařil, Martin (IOP Publishing, 2017-10-25)
    New kind of plasters with improved thermal insulating ability are presented in this article. Improvement was reached by utilization of lightweight expanded perlite with high porosity. The second used aggregate was silica ...
  • Effect of the preparation of lime putties on their properties 

    Soukupová, Eva; Tihlaříková, Eva; Neděla, Vilém; Rovnaníková, Pavla; Pavlík, Jaroslav (Springer Nature, 2017-12-08)
    In the study of lime as the basic component of historical mortars and plasters, four lime putties prepared from various kinds of lime of various granulometry and by various ways of preparation were evaluated. The rheological ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Effect of particle size of waste brick powder on the properties of alkaline activated materials 

    Brînduş-Simuţ, Jiřina; Vyšvařil, Martin; Bayer, Patrik; Keppert, Martin; Rovnaníková, Pavla (IOP Publishing, 2018-07-12)
    The properties of alkaline activated brick dust mixed with water glass with a silicate modulus (Ms) of 1.0 were studied in fresh mixtures as well as hardened products in connection with the particle size of the dust. The ...
  • Rheological and mechanical properties of alkali-activated brick powder based pastes: effect of amount of alkali activator 

    Vyšvařil, Martin; Vejmelková, Eva; Rovnaníková, Pavla (IOP Publishing, 2018-07-12)
    The rheological behaviour and mechanical properties of alkali-activated materials prepared by activation of a brick powder by alkaline solution (alkali + water glass) is presented in this paper. The effect of quantity of ...
  • Characterization of aerial lime-based mortars with addition of biopolymers 

    Žižlavský, Tomáš; Vyšvařil, Martin; Rovnaníková, Pavla (IOP Publishing, 2018-07-12)
    The paper studies the influence of addition of viscosity enhancing biopolymers (diutan gum, gellan gum, xanthan gum, carrageenan, and sodium salt of alginic acid) in the doses of 0.1%, 0.5% and 1% on the fresh state, and ...
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