The nature of kaolinitic clays and their impact on the performance of SCM

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F23%3A00372818" target="_blank" >RIV/68407700:21110/23:00372818 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1088/1742-6596/2628/1/012032" target="_blank" >https://doi.org/10.1088/1742-6596/2628/1/012032</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1742-6596/2628/1/012032" target="_blank" >10.1088/1742-6596/2628/1/012032</a>

Jazyk výsledku

angličtina

Název v původním jazyce

The nature of kaolinitic clays and their impact on the performance of SCM

Popis výsledku v původním jazyce

Nowadays, metakaolin is currently widely used as a supplementary cementitious material in the concrete industry. However, there are significant differences between kaolinitic clays, which can be used for the production of metakaolin. They can vary in the granulometry as well in the mineralogical composition (more precisely the content of varying impurities can differ widely). The main aim of this article is to assess the impact of mentioned variation on the thermal activation of such kaolinitic clays. For this purpose, four clays from the Czech Republic were chosen and examined. Primarily, their characterization composed of XRD, DSC, granulometry, and specific surface area was studied. Then these clays were thermally activated at temperatures from 500°C to 650°C. Afterwards, the changes in determined properties were investigated. Then the samples of blended cement pastes with a replacement level of 15% were produced, and basic physical and mechanical properties were determined. It was proved that for particular clays, different temperature treatments were optimal, which further lead to varying results of the mechanical performance of blended cement-based pastes. Such variation can be linked to the phase composition of studied clays.

Název v anglickém jazyce

The nature of kaolinitic clays and their impact on the performance of SCM

Popis výsledku anglicky

Nowadays, metakaolin is currently widely used as a supplementary cementitious material in the concrete industry. However, there are significant differences between kaolinitic clays, which can be used for the production of metakaolin. They can vary in the granulometry as well in the mineralogical composition (more precisely the content of varying impurities can differ widely). The main aim of this article is to assess the impact of mentioned variation on the thermal activation of such kaolinitic clays. For this purpose, four clays from the Czech Republic were chosen and examined. Primarily, their characterization composed of XRD, DSC, granulometry, and specific surface area was studied. Then these clays were thermally activated at temperatures from 500°C to 650°C. Afterwards, the changes in determined properties were investigated. Then the samples of blended cement pastes with a replacement level of 15% were produced, and basic physical and mechanical properties were determined. It was proved that for particular clays, different temperature treatments were optimal, which further lead to varying results of the mechanical performance of blended cement-based pastes. Such variation can be linked to the phase composition of studied clays.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

<a href="/cs/project/GA22-16577S" target="_blank" >GA22-16577S: Možnosti využití tepelně aktivovaných jílů jako částečné náhrady cementu</a><br>

Návaznosti

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

Rok uplatnění

2023

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 2628 (2023)

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

Poprad

Datum konání akce

6. 9. 2023

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—