Publication detail

Fresh state properties of spongilite blended cement pastes

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

Original Title

Fresh state properties of spongilite blended cement pastes

Type

conference paper

Language

English

Original Abstract

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.

Keywords

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

Authors

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

Released

8. 2. 2021

Publisher

American Institute of Physics

Location

Melville, NY, USA

ISBN

978-0-7354-4066-1

Book

SPECIAL CONCRETE AND COMPOSITES 2020: 17th International Conference

ISBN

1551-7616

Periodical

AIP Conference Proceedings

Year of study

2021

Number

2322

State

United States of America

Pages from

1

Pages to

6

Pages count

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"
}