Publication detail

Mechanical fracture properties of alkali-activated slag with graphite filler

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

Original Title

Mechanical fracture properties of alkali-activated slag with graphite filler

Type

abstract

Language

English

Original Abstract

Alkali-activated slag is a building material which is considered an alternative to ordinary Portland cement based materials. 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 mechanical fracture properties of alkali-activated slag composite is investigated. Graphite powder was added in the amount of 5, 10 and 15% with respect to the slag mass. Modulus of elasticity, fracture toughness and fracture energy were determined using standard three-point bending test on prismatic specimens with central notch. The course of fracture tests was also monitored by acoustic emission (AE) method. Compressive strength was determined on the fragments remaining after the fracture tests. Results showed that addition of graphite caused a decrease in compressive strength, fracture toughness and fracture energy but modulus of elasticity increased. Addition of graphite also caused a decrease in AE events and increase in amplitude of signals. This implies that mortars with graphite filler are more brittle than the reference mortar, and lower number of much larger cracks is formed during the fracture test.

Keywords

Fracture test; alkali-activation; slag; graphite; acoustic emission

Authors

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

Released

8. 11. 2016

Publisher

Technical University of Košice

Location

Košice

ISBN

978-80-553-2643-6

Book

SPACE 2016

Pages from

1

Pages to

2

Pages count

2

BibTex

@misc{BUT129736,
  author="Pavel {Rovnaník} and Hana {Šimonová} and Libor {Topolář} and Zbyněk {Keršner}",
  title="Mechanical fracture properties of alkali-activated slag with graphite filler",
  booktitle="SPACE 2016",
  year="2016",
  pages="1--2",
  publisher="Technical University of Košice",
  address="Košice",
  isbn="978-80-553-2643-6",
  note="abstract"
}