Publication detail

Electrical and Self-Sensing Properties of Alkali-Activated Slag Composite with Graphite Filler

ROVNANÍK, P. KUSÁK, I. BAYER, P. SCHMID, P. FIALA, L.

Original Title

Electrical and Self-Sensing Properties of Alkali-Activated Slag Composite with Graphite Filler

Type

journal article in Web of Science

Language

English

Original Abstract

The electrical properties of concrete are gaining their importance for the application in building construction. In this study, graphite powder was added to alkali-activated slag mortar as an electrically conductive filler in order to enhance the mortar’s conductive properties. The amount of graphite ranged from 1% to 30% of the slag mass. The effect of the graphite powder on the resistivity, capacitance, mechanical properties, and microstructure of the composite was investigated. Selected mixtures were then used for the testing of self-sensing properties under compressive loading. The results show that the addition of an amount of graphite equal to up to 10% of the slag mass improved the electrical properties of the alkali-activated slag. Higher amounts of filler did not provide any further improvement in electrical properties at lower AC frequencies but caused a strong deterioration in mechanical properties. The best self-sensing properties were achieved for the mixture with 10wt% of graphite, but only at low compressive stresses of up to 6 MPa.

Keywords

alkali-activated slag; graphite; electrical resistivity; self-sensing; compressive strength; microstructure

Authors

ROVNANÍK, P.; KUSÁK, I.; BAYER, P.; SCHMID, P.; FIALA, L.

Released

16. 5. 2019

Publisher

MDPI

Location

Švýcarsko

ISBN

1996-1944

Periodical

Materials

Year of study

12

Number

1

State

Swiss Confederation

Pages from

1

Pages to

16

Pages count

16

URL

https://www.mdpi.com/1996-1944/12/10/1616

Full text in the Digital Library

http://hdl.handle.net/11012/178353

BibTex

@article{BUT157014,
  author="Pavel {Rovnaník} and Ivo {Kusák} and Patrik {Bayer} and Pavel {Schmid} and Lukáš {Fiala}",
  title="Electrical and Self-Sensing Properties of Alkali-Activated Slag Composite with Graphite Filler",
  journal="Materials",
  year="2019",
  volume="12",
  number="1",
  pages="1--16",
  doi="10.3390/ma12101616",
  issn="1996-1944",
  url="https://www.mdpi.com/1996-1944/12/10/1616"
}