DETERMINATION OF THE OPTIMAL COMPOSITION OF THE NEW HYDRAULIC BINDER PREPARED FROM METAKAOLIN, ANHYDRITE AND LIME

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F22%3A43925791" target="_blank" >RIV/60461373:22310/22:43925791 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22810/22:43925791 RIV/68407700:21110/22:00364133

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

DETERMINATION OF THE OPTIMAL COMPOSITION OF THE NEW HYDRAULIC BINDER PREPARED FROM METAKAOLIN, ANHYDRITE AND LIME

Popis výsledku v původním jazyce

This work investigates the preparation of a new hydraulic binder based on metakaolin, anhydrite and free lime,which may in the future become an alternative to Portland cement. A series of 26 mixtures with varying amountsof calcined metakaolin clay (50–80 wt.%), anhydrite (10–30 wt.%) and lime (5–35 wt.%) were prepared. Themixtures had the same water to binder ratio of 0.35 and contained a superplasticizer. The compressive strengthof the mixtures was assessed after 7 and 28 days. Furthermore, on selected 28-day samples of hardened bindersthe phase composition and porosity were determined and also scanning electron microscope images were taken.Compressive strengths exceeding 60 MPa after 7 and 28 days of wet storage were measured for the selectedoptimal compositions. These results are comparable to the characteristics of Portland cement. In addition, theseoptimal mixtures did not display any potentially dangerous expansive behaviour. Expansion behaviour wasobserved only for samples with high lime content, especially in the mixture containing 35 wt.% of lime.Furthermore, it was found that ettringite is the main crystalline phase in hardened binder mixtures.

Název v anglickém jazyce

DETERMINATION OF THE OPTIMAL COMPOSITION OF THE NEW HYDRAULIC BINDER PREPARED FROM METAKAOLIN, ANHYDRITE AND LIME

Popis výsledku anglicky

This work investigates the preparation of a new hydraulic binder based on metakaolin, anhydrite and free lime,which may in the future become an alternative to Portland cement. A series of 26 mixtures with varying amountsof calcined metakaolin clay (50–80 wt.%), anhydrite (10–30 wt.%) and lime (5–35 wt.%) were prepared. Themixtures had the same water to binder ratio of 0.35 and contained a superplasticizer. The compressive strengthof the mixtures was assessed after 7 and 28 days. Furthermore, on selected 28-day samples of hardened bindersthe phase composition and porosity were determined and also scanning electron microscope images were taken.Compressive strengths exceeding 60 MPa after 7 and 28 days of wet storage were measured for the selectedoptimal compositions. These results are comparable to the characteristics of Portland cement. In addition, theseoptimal mixtures did not display any potentially dangerous expansive behaviour. Expansion behaviour wasobserved only for samples with high lime content, especially in the mixture containing 35 wt.% of lime.Furthermore, it was found that ettringite is the main crystalline phase in hardened binder mixtures.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/FW01010195" target="_blank" >FW01010195: Pokročilé výrobní technologie pro strategické využití a skladování vedlejších energetických produktů (VEP)</a><br>

Návaznosti

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

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the 9th International Conference on Chemical Technology

ISBN

978-80-88307-11-2

ISSN

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e-ISSN

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Počet stran výsledku

6

Strana od-do

111-116

Název nakladatele

Czech Society of Industrial Chemistry

Místo vydání

Prague

Místo konání akce

Mikulov

Datum konání akce

25. 4. 2022

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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