Publication detail

Crack Initiation of Alkali-activated Slag Based Composites with Graphite Filler

ŠIMONOVÁ, H. TOPOLÁŘ, L. ROVNANÍK, P. SCHMID, P. KERŠNER, Z.

Original Title

Crack Initiation of Alkali-activated Slag Based Composites with Graphite Filler

Type

conference paper

Language

English

Original Abstract

The alkali-activated slag is an alternative building material to ordinary Portland cement based materials. This type of material is effective in reducing CO2 emissions and energy consumption. Addition of graphite powder increases its electric conductivity, hence, introducing new functionality to building materials such as self-sensing and self-heating properties. In this study, the effect of graphite filler on the crack initiation of alkali-activated slag composite is investigated. The graphite powder was added in the amount of 5, 10 and 15% with respect to the slag mass. Beam specimens with an initial stress concentrator were tested in three-point bending at the age of 28 days. The load versus crack mouth crack opening displacement (F–CMOD) diagrams were recorded during the fracture tests and subsequently evaluated using the Double-K fracture model. This model allows the quantification of two different levels of crack propagation: initiation, which corresponds to the beginning of stable crack growth, and the level of unstable crack propagation. The course of fracture tests was also monitored by acoustic emission (AE) method.

Keywords

Fracture test, crack initiation, double-K model, alkali-activation, slag, graphite, acoustic emission

Authors

ŠIMONOVÁ, H.; TOPOLÁŘ, L.; ROVNANÍK, P.; SCHMID, P.; KERŠNER, Z.

Released

22. 1. 2018

Publisher

Trans Tech Publications

Location

Switzerland

ISBN

978-3-0357-1096-0

Book

Key Engineering Materials: Non-Traditional Cement and Concrete

ISBN

1013-9826

Periodical

Key Engineering Materials (print)

Year of study

761

State

Swiss Confederation

Pages from

57

Pages to

60

Pages count

4

BibTex

@inproceedings{BUT141925,
  author="Hana {Šimonová} and Libor {Topolář} and Pavel {Rovnaník} and Pavel {Schmid} and Zbyněk {Keršner}",
  title="Crack Initiation of Alkali-activated Slag Based Composites with Graphite Filler
",
  booktitle="Key Engineering Materials: Non-Traditional Cement and Concrete",
  year="2018",
  journal="Key Engineering Materials (print)",
  volume="761",
  pages="57--60",
  publisher="Trans Tech Publications",
  address="Switzerland",
  doi="10.4028/www.scientific.net/KEM.761.79",
  isbn="978-3-0357-1096-0",
  issn="1013-9826"
}