Publication detail

Rheological and mechanical properties of alkali-activated brick powder based pastes: effect of amount of alkali activator

VYŠVAŘIL, M. VEJMELKOVÁ, E. ROVNANÍKOVÁ, P.

Original Title

Rheological and mechanical properties of alkali-activated brick powder based pastes: effect of amount of alkali activator

Type

conference paper

Language

English

Original Abstract

The rheological behaviour and mechanical properties of alkali-activated materials prepared by activation of a brick powder by alkaline solution (alkali + water glass) is presented in this paper. The effect of quantity of alkaline activator on the rheological and mechanical properties of brick pastes prepared from two types of brick dust was monitored. The rheological investigation included the characterization of flow properties and viscoelastic properties of the fresh mixtures. Compression and bending strengths were determined at 7, 28, 56 and 90 days. These materials have a low yield stress and a high viscosity strongly influenced by the amount of alkali activator. The fresh brick pastes become liquid more easily with increasing amount of alkali activator. The rising amount of alkali activator leads to a decrease of the material cohesion. The results of rheological and mechanical properties investigation showed considerable differences in behaviour of particular types of brick dust.

Keywords

brick powder; alkaline activation; rheology; yield stress; viscosity; strength; geopolymerization

Authors

VYŠVAŘIL, M.; VEJMELKOVÁ, E.; ROVNANÍKOVÁ, P.

Released

12. 7. 2018

Publisher

IOP Publishing

ISBN

1757-8981

Periodical

IOP Conference Series: Materials Science and Engineering

Year of study

379

Number

1

State

United Kingdom of Great Britain and Northern Ireland

Pages from

1

Pages to

8

Pages count

8

URL

http://iopscience.iop.org/article/10.1088/1757-899X/379/1/012011

Full text in the Digital Library

http://hdl.handle.net/11012/137356

BibTex

@inproceedings{BUT148887,
  author="Martin {Vyšvařil} and Eva {Vejmelková} and Pavla {Rovnaníková}",
  title="Rheological and mechanical properties of alkali-activated brick powder based pastes: effect of amount of alkali activator",
  booktitle="International Conference Building Materials, Product and Technologies",
  year="2018",
  journal="IOP Conference Series: Materials Science and Engineering",
  volume="379",
  number="1",
  pages="1--8",
  publisher="IOP Publishing",
  doi="10.1088/1757-899X/379/1/012011",
  issn="1757-8981",
  url="http://iopscience.iop.org/article/10.1088/1757-899X/379/1/012011"
}