Low Energy Cements Prepared from Modified SO3 Doped Clinkers

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26232511%3A_____%2F21%3AN0000077" target="_blank" >RIV/26232511:_____/21:N0000077 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/978-981-16-7160-9_75" target="_blank" >http://dx.doi.org/10.1007/978-981-16-7160-9_75</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/978-981-16-7160-9_75" target="_blank" >10.1007/978-981-16-7160-9_75</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Low Energy Cements Prepared from Modified SO3 Doped Clinkers

Popis výsledku v původním jazyce

Clinkers doped with optimized combinations of SO3 and Li2O or CuO or MgO were synthetized in laboratory furnace at 1350 °C. Clinkers were characterized by light and scanning electron microscopy. Chemical and phase composition of clinkers is discussed with respect to early hydration properties of cements. Hydration of cement pastes was monitored by isothermal calorimetry and reaction kinetics correlated with early strengths. Flexural and compressive strengths of cements were determined after 2, 7, 28, 90 and 365 days of hydration according to EN 196 on mortars. At high CuO contents, Cu-rich phases form inclusions in C2S. The limited incorporation of MgO into the structure of clinker phases is represented in the form of inclusions in C3S. Due to formation of Cu(OH)2, hydration slows down significantly, while Li salts accelerate early hydration. For the studied modified SO3 doped cements, there is a good correlation between heat development during the first 2 days and strength development during 1 year. Proposed four low-energy cements based on SO3 doped clinkers burned at 100 °C lower temperature meet the requirement for CEM I strengths.

Název v anglickém jazyce

Low Energy Cements Prepared from Modified SO3 Doped Clinkers

Popis výsledku anglicky

Clinkers doped with optimized combinations of SO3 and Li2O or CuO or MgO were synthetized in laboratory furnace at 1350 °C. Clinkers were characterized by light and scanning electron microscopy. Chemical and phase composition of clinkers is discussed with respect to early hydration properties of cements. Hydration of cement pastes was monitored by isothermal calorimetry and reaction kinetics correlated with early strengths. Flexural and compressive strengths of cements were determined after 2, 7, 28, 90 and 365 days of hydration according to EN 196 on mortars. At high CuO contents, Cu-rich phases form inclusions in C2S. The limited incorporation of MgO into the structure of clinker phases is represented in the form of inclusions in C3S. Due to formation of Cu(OH)2, hydration slows down significantly, while Li salts accelerate early hydration. For the studied modified SO3 doped cements, there is a good correlation between heat development during the first 2 days and strength development during 1 year. Proposed four low-energy cements based on SO3 doped clinkers burned at 100 °C lower temperature meet the requirement for CEM I strengths.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20500 - Materials engineering

Projekt

<a href="/cs/project/GA19-05762S" target="_blank" >GA19-05762S: Hydratace a vlastnosti reaktivních vysocebelitických cementů</a><br>

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název statě ve sborníku

CIGOS 2021, Emerging Technologies and Applications for Green Infrastructure

ISBN

978-981-16-7159-3

ISSN

2366-2557

e-ISSN

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Počet stran výsledku

9

Strana od-do

743-751

Název nakladatele

Springer, Singapore

Místo vydání

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Místo konání akce

Ha Long, Vietnam

Datum konání akce

28. 10. 2021

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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