Viscosimetry of cement pastes - Analytical and numerical solutions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F21%3A00348389" target="_blank" >RIV/68407700:21110/21:00348389 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1063/5.0042095" target="_blank" >https://doi.org/10.1063/5.0042095</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1063/5.0042095" target="_blank" >10.1063/5.0042095</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Viscosimetry of cement pastes - Analytical and numerical solutions

Popis výsledku v původním jazyce

The paper briefly summarizes theory needed for analytical and numerical solutions applied in viscosimetry of cement pastes. Practical lab or field tests (such as slump-flow tests) are compared with viscosity characterization in a rotational rheometer. Analytical solutions and numerical approaches are verified on experimental data gained on three different mixtures varying in water to binder ratio and in the presence of an additive. It was found that simple analytical estimates are not appropriate in most cases. Numerical models are highly dependent on the constitutive parameters that are extracted from rheometers. Two simple model variants were studied and conclusions on the suitability of the models drawn for the cement pastes. In specific cases (simple cement pastes without additives) the agreement with experimental data was found. For a cement paste with thixotropic additive simple models fail and other more complex model would be appropriate.

Název v anglickém jazyce

Viscosimetry of cement pastes - Analytical and numerical solutions

Popis výsledku anglicky

The paper briefly summarizes theory needed for analytical and numerical solutions applied in viscosimetry of cement pastes. Practical lab or field tests (such as slump-flow tests) are compared with viscosity characterization in a rotational rheometer. Analytical solutions and numerical approaches are verified on experimental data gained on three different mixtures varying in water to binder ratio and in the presence of an additive. It was found that simple analytical estimates are not appropriate in most cases. Numerical models are highly dependent on the constitutive parameters that are extracted from rheometers. Two simple model variants were studied and conclusions on the suitability of the models drawn for the cement pastes. In specific cases (simple cement pastes without additives) the agreement with experimental data was found. For a cement paste with thixotropic additive simple models fail and other more complex model would be appropriate.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/FW01010521" target="_blank" >FW01010521: Mikrostrukturální modifikace samozhutnitelných betonů pro snížení tlaků na bednění</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

SPECIAL CONCRETE AND COMPOSITES 2020: 17th International Conference

ISBN

978-0-7354-4066-1

ISSN

0094-243X

e-ISSN

0094-243X

Počet stran výsledku

7

Strana od-do

—

Název nakladatele

AIP Publishing

Místo vydání

Melville, NY

Místo konání akce

Skalský Dvůr

Datum konání akce

14. 10. 2020

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000653725400031