Výsledky vyhledávání - "Jiří ŠVEC"

Akademický článek

Preparation of magnetic nanoparticles by one step synthesis with morphology of particles changed based on time of reaction and temperature treatment

Autor: Tomáš Solný, Petr Ptáček, Tomáš Opravil, Lucie Dlabajová, Matěj Březina, Jiří Másilko, Jiří Švec, Rajan Ambat

Publikováno v: Journal of Experimental Nanoscience, Vol 16, Iss 1, Pp 1-10 (2021)

In present study, nanosized iron oxides particles are synthetised by easy one step precipitation from Mohric salt (NH4)2Fe(SO4)2·6H2O reacting with sodium hydroxide solution in temperature up to 60 °C. When changing the time of reaction, the iron o

Externí odkaz: https://doaj.org/article/6dd8c72e90124b75ad54ccc0a2f14f94

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Akademický článek

Physico-Chemical Properties of Lithium Silicates Related to Their Utilization for Concrete Densifiers

Autor: Lukáš Kalina, Vlastimil Bílek, Martin Sedlačík, Vladislav Cába, Jiří Smilek, Jiří Švec, Eva Bartoníčková, Pavel Rovnaník, Josef Fládr

Publikováno v: Materials, Vol 16, Iss 6, p 2173 (2023)

Protection of concrete against aggressive influences from the surrounding environment becomes an important step to increase its durability. Today, alkali silicate solutions are advantageously used as pore-blocking treatments that increase the hardnes

Externí odkaz: https://doaj.org/article/04deed1fb4314ba4a848aeece336be89

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Akademický článek

Correlating Hydration of Alkali-Activated Slag Modified by Organic Additives to the Evolution of Its Properties

Autor: Vlastimil Bílek, Lukáš Kalina, Richard Dvořák, Radoslav Novotný, Jiří Švec, Jiří Másilko, František Šoukal

Publikováno v: Materials, Vol 16, Iss 5, p 1908 (2023)

This study investigates the relationships between the hydration kinetics of waterglass-activated slag and the development of its physical-mechanical properties, as well as its color change. To modify the calorimetric response of alkali-activated slag

Externí odkaz: https://doaj.org/article/81b51f795221468aa8066221be7472c3

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Akademický článek

Use of Isothermal and Isoperibolic Calorimetry to Study the Effect of Zinc on Hydration of Cement Blended with Fly Ash

Autor: Pavel Šiler, Iva Kolářová, Radoslav Novotný, Jiří Másilko, Jan Bednárek, Martin Janča, Jan Koplík, Jan Hajzler, Lukáš Matějka, Michal Marko, Jiří Švec, Martin Zlámal, Eva Kuzielová, Tomáš Opravil, František Šoukal

Publikováno v: Materials, Vol 13, Iss 22, p 5215 (2020)

Increasing utilization of secondary raw materials and alternative fuels results in increasing contents of metals in cements. Zinc is one of these elements. It comes to cement with secondary raw materials such as slag or fly ash or by the utilization

Externí odkaz: https://doaj.org/article/7c5ff042bb7949b98adebfdf9e0af842

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Simultaneous thermogravimetric and differential thermal analysis determination of products formed during hydration of blended Portland cement doped with zinc

Autor: Jiří Švec, Jan Koplík, Tomáš Opravil, Lukáš Matějka, M. Janča, Radoslav Novotný, Iva Kolářová, Jiří Másilko, Jan Hajzler, Pavel Šiler

Publikováno v: Journal of Thermal Analysis and Calorimetry. 142:1749-1758

With the increasing use of secondary raw materials and alternative fuels in the cement production industry, the amount of present trash elements rapidly increases. Most of these problematic elements affect the quality of produced clinker or blended c

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::02d8c4a3a82bbc7b92c00418b6f218cf
https://doi.org/10.1007/s10973-020-10253-5

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