Residual physical properties of thermally loaded alkali activated slag

Result code in 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>

Result on the web

<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>

Result language

angličtina

Original language name

Residual physical properties of thermally loaded alkali activated slag

Original language description

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.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20504 - Ceramics

Project

<a href="/en/project/GA23-04772S" target="_blank" >GA23-04772S: Physical and chemical processes in alkali activated ceramics exposed to high temperatures</a><br>

Continuities

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

Publication year

2024

Confidentiality

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

Article name in the collection

Journal of Physics: Conference Series 2911

ISBN

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ISSN

1742-6588

e-ISSN

1742-6596

Number of pages

6

Pages from-to

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Publisher name

IOP Publishing Ltd.

Place of publication

Bristol

Event location

Miskolctapolca

Event date

Sep 4, 2024

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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