Detail publikace

Fresh state properties of spongilite blended cement pastes

VYŠVAŘIL, M. ŽIŽLAVSKÝ, T. ROVNANÍKOVÁ, P.

Originální název

Fresh state properties of spongilite blended cement pastes

Typ

článek ve sborníku ve WoS nebo Scopus

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

Spongilite; cement mortar; fresh state; rheology; calorimetry; setting time; consistency;

Autoři

VYŠVAŘIL, M.; ŽIŽLAVSKÝ, T.; ROVNANÍKOVÁ, P.

Vydáno

8. 2. 2021

Nakladatel

American Institute of Physics

Místo

Melville, NY, USA

ISBN

978-0-7354-4066-1

Kniha

SPECIAL CONCRETE AND COMPOSITES 2020: 17th International Conference

ISSN

1551-7616

Periodikum

AIP Conference Proceedings

Ročník

2021

Číslo

2322

Stát

Spojené státy americké

Strany od

1

Strany do

6

Strany počet

6

URL

https://aip.scitation.org/doi/abs/10.1063/5.0041605

BibTex

@inproceedings{BUT169274,
  author="Martin {Vyšvařil} and Tomáš {Žižlavský} and Pavla {Rovnaníková}",
  title="Fresh state properties of spongilite blended
cement pastes",
  booktitle="SPECIAL CONCRETE AND COMPOSITES 2020: 17th International Conference",
  year="2021",
  journal="AIP Conference Proceedings",
  volume="2021",
  number="2322",
  pages="1--6",
  publisher="American Institute of Physics",
  address="Melville, NY, USA",
  doi="10.1063/5.0041605",
  isbn="978-0-7354-4066-1",
  issn="1551-7616",
  url="https://aip.scitation.org/doi/abs/10.1063/5.0041605"
}