Impact of oven drying and sample dimensions on calcite content in cement pastes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F21%3A00352536" target="_blank" >RIV/68407700:21110/21:00352536 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1063/5.0069707" target="_blank" >http://dx.doi.org/10.1063/5.0069707</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0069707" target="_blank" >10.1063/5.0069707</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Impact of oven drying and sample dimensions on calcite content in cement pastes

Popis výsledku v původním jazyce

In order to follow the progress of cement hydration by analytical methods, the ongoing hydration reaction needs to be stopped by removing free water from the samples. There are several water removal techniques, affecting in varying degrees the chemical composition of cement-based materials. Oven drying is one of the most widely used drying techniques because of its high effectiveness and easy availability. Nevertheless, elevated temperatures may speed up hydration processes and support carbonation. This paper aims to investigate the impact of oven drying and sample dimensions on the amount of calcite generated in the cement pastes. The cement pastes are prepared with a water-to-cement ratio of 0.4 and are stored in water for 28 days. The hydration stoppage methods applied thereafter include oven drying at 50 °C, 80 °C, and 110 °C. Their impact on the chemical composition and microstructure development, with emphasis on the calcite content in the studied cement pastes, is analyzed by means of thermal analysis (DSC/TG), X-ray diffraction analysis, and these results were complemented by mercury intrusion porosimetry.

Název v anglickém jazyce

Impact of oven drying and sample dimensions on calcite content in cement pastes

Popis výsledku anglicky

In order to follow the progress of cement hydration by analytical methods, the ongoing hydration reaction needs to be stopped by removing free water from the samples. There are several water removal techniques, affecting in varying degrees the chemical composition of cement-based materials. Oven drying is one of the most widely used drying techniques because of its high effectiveness and easy availability. Nevertheless, elevated temperatures may speed up hydration processes and support carbonation. This paper aims to investigate the impact of oven drying and sample dimensions on the amount of calcite generated in the cement pastes. The cement pastes are prepared with a water-to-cement ratio of 0.4 and are stored in water for 28 days. The hydration stoppage methods applied thereafter include oven drying at 50 °C, 80 °C, and 110 °C. Their impact on the chemical composition and microstructure development, with emphasis on the calcite content in the studied cement pastes, is analyzed by means of thermal analysis (DSC/TG), X-ray diffraction analysis, and these results were complemented by mercury intrusion porosimetry.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA20-14506S" target="_blank" >GA20-14506S: Metody pro zastavení hydratace cementu, vápna a sádry</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

AIP Conference Proceedings 2429

ISBN

978-0-7354-4139-2

ISSN

0094-243X

e-ISSN

1551-7616

Počet stran výsledku

6

Strana od-do

"020032-1"-"020032-6"

Název nakladatele

AIP Conference Proceedings

Místo vydání

New York

Místo konání akce

Kazimierz Dolny

Datum konání akce

1. 9. 2021

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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