Paddle Mixer for Viscoplastic Materials and Pastes

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F24%3A00376168" target="_blank" >RIV/68407700:21220/24:00376168 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.15255/CABEQ.2024.2289" target="_blank" >https://doi.org/10.15255/CABEQ.2024.2289</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.15255/CABEQ.2024.2289" target="_blank" >10.15255/CABEQ.2024.2289</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Paddle Mixer for Viscoplastic Materials and Pastes

Popis výsledku v původním jazyce

A modified paddle mixer suitable for the homogenization of viscoplastic fluids and pastes, such as contemporary concrete mixtures, was developed to enhance homogeneity of the product, a crucial step in ensuring desired mechanical properties. In addition to the improvement in flow characteristics, this study presents the basic dimensionless characteristics in regression form, along with the measurement of the Metzner–Otto constant. These characteristics are essential for the use of the paddle mixer as an onsite rheometer, enabling rapid and straightforward evaluation of the desired rheological properties of the prepared mixture. The performance of the paddle mixer was assessed through homogenization experiments and power input measurements at various rotation speeds. The paddle mixer displayed creeping flow behavior up to a Re value of 50. The geometry of the paddle mixer was modified to achieve homogeneity throughout the volume, significantly influencing mixing mainly in the axial region of the mixer. To compensate for the non-Newtonian behavior, the Metzner–Otto approach was employed. Under creeping flow conditions and for pastes displaying flow index above 0.5, the paddle mixer can be characterized by a Metzner-Otto constant of 54.

Název v anglickém jazyce

Paddle Mixer for Viscoplastic Materials and Pastes

Popis výsledku anglicky

A modified paddle mixer suitable for the homogenization of viscoplastic fluids and pastes, such as contemporary concrete mixtures, was developed to enhance homogeneity of the product, a crucial step in ensuring desired mechanical properties. In addition to the improvement in flow characteristics, this study presents the basic dimensionless characteristics in regression form, along with the measurement of the Metzner–Otto constant. These characteristics are essential for the use of the paddle mixer as an onsite rheometer, enabling rapid and straightforward evaluation of the desired rheological properties of the prepared mixture. The performance of the paddle mixer was assessed through homogenization experiments and power input measurements at various rotation speeds. The paddle mixer displayed creeping flow behavior up to a Re value of 50. The geometry of the paddle mixer was modified to achieve homogeneity throughout the volume, significantly influencing mixing mainly in the axial region of the mixer. To compensate for the non-Newtonian behavior, the Metzner–Otto approach was employed. Under creeping flow conditions and for pastes displaying flow index above 0.5, the paddle mixer can be characterized by a Metzner-Otto constant of 54.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20301 - Mechanical engineering

Projekt

<a href="/cs/project/GA21-24070S" target="_blank" >GA21-24070S: Model segregace vláken v závislosti na reologických vlastnostech čerstvého HPC</a><br>

Návaznosti

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

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Chemical and Biochemical Engineering Quarterly

ISSN

0352-9568

e-ISSN

1846-5153

Svazek periodika

38

Číslo periodika v rámci svazku

2

Stát vydavatele periodika

HR - Chorvatská republika

Počet stran výsledku

8

Strana od-do

145-152

Kód UT WoS článku

001272592500004

EID výsledku v databázi Scopus

2-s2.0-85200205186