Detail publikace

Mechanical fracture properties of alkali-activated slag with graphite filler

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

Originální název

Mechanical fracture properties of alkali-activated slag with graphite filler

Typ

abstrakt

Jazyk

angličtina

Originální abstrakt

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.

Klíčová slova

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

Autoři

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

Vydáno

8. 11. 2016

Nakladatel

Technical University of Košice

Místo

Košice

ISBN

978-80-553-2643-6

Kniha

SPACE 2016

Strany od

1

Strany do

2

Strany počet

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"
}