Zobrazeno 1 - 10
of 120
pro vyhledávání: '"Vlastimil Bílek"'
Publikováno v:
Acta Polytechnica, Vol 63, Iss 6 (2023)
This paper deals with the monitoring of the internal structure behaviour of an alkaliactivated slag (AAS) paste. The slag was activated with a 4M solution of sodium hydroxide. The behaviour of the internal structure of the paste was regularly monitor
Externí odkaz:
https://doaj.org/article/d2715dce97414ad59c777855d330a372
Publikováno v:
Buildings, Vol 13, Iss 12, p 2969 (2023)
The present research compared the behaviours of lightweight mortars based on ordinary Portland cement (OPC), calcium sulphoaluminate cement (CSAC), and calcium aluminate cement (CAC) containing expanded perlite and subjected to elevated temperatures.
Externí odkaz:
https://doaj.org/article/88611fa2bbd64b58a05a859b5362e33a
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
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
Autor:
Petr Hrubý, Lukáš Kalina, Vlastimil Bílek, Sarka Keprdova, Jiří Másilko, Iveta Plšková, Jan Koplík, Libor Topolář
Publikováno v:
Materials, Vol 15, Iss 4, p 1344 (2022)
Alkali-activated systems (AAS) represent an ecologically and economically sustainable inorganic binder as an alternative to ordinary Portland cement (OPC). One of the main benefits of AAS is their durability in aggressive environments, which can be e
Externí odkaz:
https://doaj.org/article/750ac3065af34c8c86fe97e785e0ebde
Autor:
Vlastimil Bílek, Petr Hrubý, Valeriia Iliushchenko, Jan Koplík, Jakub Kříkala, Michal Marko, Jan Hajzler, Lukáš Kalina
Publikováno v:
Materials, Vol 15, Iss 1, p 231 (2021)
The very early stages of alkaline activation of slag control its rheology and setting, but also affect its hydration, which occurs later. Simultaneously, these parameters are dictated by the nature and dose of the alkaline activator. Therefore, we in
Externí odkaz:
https://doaj.org/article/a3791ebbe2dd485f8b9f9e078636b570
Autor:
Hana Šimonová, Barbara Kucharczyková, Vlastimil Bílek, Lucie Malíková, Petr Miarka, Martin Lipowczan
Publikováno v:
Applied Sciences, Vol 11, Iss 1, p 259 (2020)
A typical example of an alternative binder to commonly used Portland cement is alkali-activated binders that have high potential as a part of a toolkit for sustainable construction materials. One group of these materials is alkali-activated slag. The
Externí odkaz:
https://doaj.org/article/3bb37d7bac9142ab9f4ea77ba191347f
Publikováno v:
Materials, Vol 13, Iss 16, p 3646 (2020)
Hybrid systems represent a new sustainable type of cement combining the properties of ordinary Portland cement and alkali-activated materials. In this study, a hybrid system based on blast furnace slag and Portland clinker was investigated. The econo
Externí odkaz:
https://doaj.org/article/adabae3a9ca94c679a25ea88813f59e7
Publikováno v:
Materials, Vol 11, Iss 9, p 1770 (2018)
Cement kiln by-pass dust (CKD) is a fine-grained by-product of Portland clinker manufacturing. Its chemical composition is not suitable for returning back into feedstock and, therefore, it has to be discharged. Such an increasing waste production con
Externí odkaz:
https://doaj.org/article/b0c6ddaf79154521ba10e800c7a3d284
Publikováno v:
Materials, Vol 9, Iss 6, p 462 (2016)
Significant drying shrinkage is one of the main limitations for the wider utilization of alkali-activated slag (AAS). Few previous works revealed that it is possible to reduce AAS drying shrinkage by the use of shrinkage-reducing admixtures (SRAs). H
Externí odkaz:
https://doaj.org/article/dc61d8b91acb4b00b5b78a2e5e48a077