Residual physical properties of thermally loaded alkali activated slag

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F24%3A00382495" target="_blank" >RIV/68407700:21110/24:00382495 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1088/1742-6596/2911/1/012028" target="_blank" >http://dx.doi.org/10.1088/1742-6596/2911/1/012028</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1742-6596/2911/1/012028" target="_blank" >10.1088/1742-6596/2911/1/012028</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Residual physical properties of thermally loaded alkali activated slag

Popis výsledku v původním jazyce

One of possible application fields of Alkali activated aluminosilicates (AAA) lies in their higher thermal stability compared to Portland cement based systems. AAA may be thermally loaded just moderately (e.g. thermal insulating foams) or more intensively (refractory AAA concrete; ceramics derived from AAA). Thermal loading is obviously causing number of physical and chemical alterations in the material which are reflected by development of functional properties of the material – primarily by its strength. Blast furnace slag is one of the traditional precursors for alkali activated materials. As the first step of the research, the effect of activator composition and dosage (mix of potassium silicate and potassium hydroxide) on the mechanical properties of activated slag was examined in broad range of Si/Al and Al/K ratios. Secondly the selected mixtures were thermally loaded to 200, 600, 800, 1000 and 1200 °C and their residual physical characteristics were determined. The heating to 200 °C caused strengthening of the all materials due to curing of geopolymeric structure. Later, at higher temperatures, the strength decreased alongside with gradual dehydroxylation and shrinkage of the material. However the loading at 1200 °C caused – in some mixtures – significant strengthening due to crystallization of new mineral phases.

Název v anglickém jazyce

Residual physical properties of thermally loaded alkali activated slag

Popis výsledku anglicky

One of possible application fields of Alkali activated aluminosilicates (AAA) lies in their higher thermal stability compared to Portland cement based systems. AAA may be thermally loaded just moderately (e.g. thermal insulating foams) or more intensively (refractory AAA concrete; ceramics derived from AAA). Thermal loading is obviously causing number of physical and chemical alterations in the material which are reflected by development of functional properties of the material – primarily by its strength. Blast furnace slag is one of the traditional precursors for alkali activated materials. As the first step of the research, the effect of activator composition and dosage (mix of potassium silicate and potassium hydroxide) on the mechanical properties of activated slag was examined in broad range of Si/Al and Al/K ratios. Secondly the selected mixtures were thermally loaded to 200, 600, 800, 1000 and 1200 °C and their residual physical characteristics were determined. The heating to 200 °C caused strengthening of the all materials due to curing of geopolymeric structure. Later, at higher temperatures, the strength decreased alongside with gradual dehydroxylation and shrinkage of the material. However the loading at 1200 °C caused – in some mixtures – significant strengthening due to crystallization of new mineral phases.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20504 - Ceramics

Projekt

<a href="/cs/project/GA23-04772S" target="_blank" >GA23-04772S: Fyzikální a chemické procesy v alkalicky aktivované keramice vystavené vysokým teplotám</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2024

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Journal of Physics: Conference Series 2911

ISBN

—

ISSN

1742-6588

e-ISSN

1742-6596

Počet stran výsledku

6

Strana od-do

—

Název nakladatele

IOP Publishing Ltd.

Místo vydání

Bristol

Místo konání akce

Miskolctapolca

Datum konání akce

4. 9. 2024

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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