Fresh state properties of spongilite blended cement pastes
The result's identifiers
Result code in 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>
Result on the web
<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>
Alternative languages
Result language
angličtina
Original language name
Fresh state properties of spongilite blended cement pastes
Original language description
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.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
—
OECD FORD branch
20101 - Civil engineering
Result continuities
Project
—
Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
SPECIAL CONCRETE AND COMPOSITES 2020: 17th International Conference
ISBN
978-0-7354-4066-1
ISSN
1551-7616
e-ISSN
—
Number of pages
6
Pages from-to
1-6
Publisher name
American Institute of Physics
Place of publication
Melville, NY, USA
Event location
Skalský dvůr
Event date
Oct 14, 2020
Type of event by nationality
CST - Celostátní akce
UT code for WoS article
000653725400001