Fresh state properties of spongilite blended cement pastes
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26110%2F21%3APU139421" target="_blank" >RIV/00216305:26110/21:PU139421 - isvavai.cz</a>
Výsledek na webu
<a href="https://aip.scitation.org/doi/abs/10.1063/5.0041605" target="_blank" >https://aip.scitation.org/doi/abs/10.1063/5.0041605</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/5.0041605" target="_blank" >10.1063/5.0041605</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Fresh state properties of spongilite blended cement pastes
Popis výsledku v původním jazyce
In this paper, the behaviour of fresh cement pastes modified by two types of spongilite in various addition is assessed with the purpose of exploring a new application of this natural pozzolans as cement mortar additives. The rheological parameters (relative yield stress, plastic viscosity, thixotropy, and fluidity index) were correlated with flow table tests, initial and final setting time of cement pastes supplemented by calorimetric measurements. The fresh pastes behave generally as Hershel–Bulkley fluids with an evolution of the rheological parameters with admixture content. Both spongilites used had a thickening influence on cement pastes despite their different mineralogical composition. They caused an increase in viscosity and yield stress, and a decrease in the thixotropy of the pastes. The spongilites extends the initial and final setting times of cement pastes. As the spongilite content in the cement paste increased, the amount of hydration heat release decreased accordingly. In the pastes with the highest replacement of cement by spongilite (40%), the time of formation of AFm phase from C3A and ettringite was slightly prolonged.
Název v anglickém jazyce
Fresh state properties of spongilite blended cement pastes
Popis výsledku anglicky
In this paper, the behaviour of fresh cement pastes modified by two types of spongilite in various addition is assessed with the purpose of exploring a new application of this natural pozzolans as cement mortar additives. The rheological parameters (relative yield stress, plastic viscosity, thixotropy, and fluidity index) were correlated with flow table tests, initial and final setting time of cement pastes supplemented by calorimetric measurements. The fresh pastes behave generally as Hershel–Bulkley fluids with an evolution of the rheological parameters with admixture content. Both spongilites used had a thickening influence on cement pastes despite their different mineralogical composition. They caused an increase in viscosity and yield stress, and a decrease in the thixotropy of the pastes. The spongilites extends the initial and final setting times of cement pastes. As the spongilite content in the cement paste increased, the amount of hydration heat release decreased accordingly. In the pastes with the highest replacement of cement by spongilite (40%), the time of formation of AFm phase from C3A and ettringite was slightly prolonged.
Klasifikace
Druh
D - Stať ve sborníku
CEP obor
—
OECD FORD obor
20101 - Civil engineering
Návaznosti výsledku
Projekt
—
Návaznosti
S - Specificky vyzkum na vysokych skolach
Ostatní
Rok uplatnění
2021
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název statě ve sborníku
SPECIAL CONCRETE AND COMPOSITES 2020: 17th International Conference
ISBN
978-0-7354-4066-1
ISSN
1551-7616
e-ISSN
—
Počet stran výsledku
6
Strana od-do
1-6
Název nakladatele
American Institute of Physics
Místo vydání
Melville, NY, USA
Místo konání akce
Skalský dvůr
Datum konání akce
14. 10. 2020
Typ akce podle státní příslušnosti
CST - Celostátní akce
Kód UT WoS článku
000653725400001